MBF COMPANY CONFIDENTIAL FIELD INFORMATION BULLETIN
SERVICE GROUP(S): MICRO,MINI,LARGE     MFG: ALL

 NACS  TYPE(S): N022                   MFG. MODEL(S): UPS, MISC
CATEGORY: LINE CONDITIONER             DESC: A/C POWER CONDITIONER

                   *** TABLE OF CONTENTS AS OF 02/01/91 ***                     

FIB 00001.TOPAZ UPS for MAI/Basic Four - General Information..........07/09/90
FIB 00002.TOPAZ UPS -  Voltage Adjustments............................06/24/86
FIB 00003.UPS information for the Basic Four 2000 and 3000 systems....07/07/87
FIB 00004.TOPAZ UPS Battery Testing/Replacement - Revised 3/26/90.....03/26/90
FIB 00005.Deleted.....................................................03/21/90
FIB 00006.Power Conditioning Devices..................................08/09/89
FIB 00007.Topaz UPS Covers no Longer Refurbished, Use Customer's......09/08/89
FIB 00008.Testing.for UPS batteries with 'open' cells - revised 2/14/902/14/90
FIB 00009.Battery Connections for Topaz Model 84130-01AA..............03/06/90
FIB 00010.Spare Batteries Won't Fit In All Models of Topaz UPS........07/06/90
FIB 00011.Wiring of Line-Conditioner PCBA on -54 Units................07/09/90
FIB 00012.Line Fuse Part Numbers for 115 Volt UPS Models..............07/16/90
FIB 00013.Exide UPS...................................................01/07/91
LINE CONDITIONER-ALL-UPS, MISC----------------------Table Of Contents Pg01 of 01
FIB 00001                                                             07/09/90


           *** TOPAZ UPS for MAI/Basic Four - General Information ***

MAI/Basic Four is selling Topaz UPS (Uninterruptible Power Supplies) of two
capacities with some Systems as an optional feature.

The purpose of the Topaz UPS is to provide AC power back-up to the Systems
during a power failure for 10 to 20 minutes.  This period of time will allow the
customer to stop operating and properly shutdown the system.

The UPS provides AC back-up when the commercial AC power is interrupted.  The
UPS includes 2 maintenance-free batteries, a battery charger and a static
inverter to convert battery power to AC power.  When the commercial AC power is
available, it powers the load directly and maintains the battery in a charged
state.  When the commercial AC power fails, the inverter is automatically turned
on to supply power to the load.

INSTALLATION:

The UPS should be connected to the power line for at least 16 hours prior to
system installation to recharge the batteries.  The internal charger operates
only when the UPS power switch is set to the ON position.

Plug ONLY the following 2 units to the UPS output receptacles:

    o  1 System Cabinet (SPx, PCx, GPx 2xx-3xx-4xx)
    o  1 Basic Four Console Terminal (4309, 4310, 4312, 4313, 4314, etc)

The unit should provide at least 10 minutes of back-up power with above load.
Do not plug any more units to the UPS to prevent overload during inverter
operation.  The  Topaz UPS is not of sufficient capacity to provide backup
power for MPx or GPx Sr.  Other larger UPS units will offered.

MAINTENANCE:

Field Maintenance is limited to:
    o  Recharge the batteries
    o  Replace the batteries (may/may not be covered by Maintenance Agreement)
    o  Replace the complete unit (without the batteries)

Most of the problems in the field are caused by discharged or defective
batteries.  An attempt should be made to recharge the batteries during 16 or
more hours, or to replace the batteries before replacing the complete unit.  The
internal charger will not operate when the batteries are totally discharged.
When this condition exists, replace the batteries or use an external charger.

NOTE:  If the UPS is connected to an AC outlet which is switched through a
       timer or otherwise disconnected from AC line when the System is not in
       use, the UPS must also be switched OFF during those periods of AC power
       interruption.  The UPS will otherwise switch to power-fail operation and
       discharge its batteries in approximately 30 minutes, even though no load
       (System) is actually operating.  This will shorten battery life, and
       cause the batteries to require complete re-charging after each period of
       AC loss.  The available backup capacity is very limited during the first
       8 to 10 hours of the re-charge process.


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB001 Pg001


Spare Parts:

Description                                           ICN        Vendor P/N
----------------------------------------------------  --------   -------------
UPS 1350 VA without line cond., without batteries     MM535076    84130-01A
UPS 1350 VA with line conditioner, without batteries  MM536076    84130-54
UPS  400 VA without line cond., without batteries     MM533071    84462-01
UPS  400 VA with line conditioner, without batteries  MM536071    84462-54
Battery, 12 volts, 30 Amp-hours Gell type             MM533080    PS12300

SPECIFICATIONS:
                         117 VOLT 60 HZ MODELS     220/240 VOLT 50 HZ MODELS 
Input Voltage Range:  + 20% -15% (144-102 volts)   (264-187)or(288-204) Volts
     Output Voltage:  120V, +/- 3.5V at 60 Hz.     Nominal +/- 7.0 Volts

TRANSFER VOLTAGE
   Line to Inverter:   96 Vac +/- 1 Vac            176 Vac or 196 Vac +/- 2 Vac
   Inverter to Line:  101 Vac maximum              190 Vac or 209 Vac maximum

    Output Capacity:   400 Volt-Amperes, (current limits at 550 Volt-Amperes)
                      1350 Volt-Amperes, (11.25 Amps at 120 Volts)

          Batteries:  Type:  Lead-acid, gel-type, maintenance free.
            Voltage:  24 volts (nominal).  2 batteries (12 volts each) connected
                      in series.

Time required to re-charge the batteries:  16 hours to recharge 90%.
                                           48 hours to recharge 100%.

        Power Cord:  6 foot power cord with NEMA plug type 5-15P (standard plug)
 Output Receptacle:  4 output receptacles NEMA type 5-15R (standard receptacle)
      Above power cord/receptacle info refers to 117 Vac 60 Hz models only

Automatic shutdown:  when batteries discharge to 19.0 +/- .5 V.
                     when current limiting continuously, after exceeding 550
                     Volt-Amperes (4.5 A @ 120V) (400 VA) or 1625 Watts (1350VA)
       Unit Weight:  66.5 lb (30.2 kg.) (400 VA)
                     90.0 lb (40.8 kg ) (1350 VA)
           Storage:  Units should be connected to the power line, with the power
                     switch on, for 48 hours prior to storage to fully recharge
                     the batteries.  They should be removed from storage and
                     recharged every 90 days.

CONTROLS AND INDICATORS.

Power switch

With the power switch in the ON position, power will be present at the output
receptacles delivered from either the power line or the inverter, depending on
the input voltage.  When the power switch is operated from OFF to ON, power will
be initially delivered to the output by the inverter.  If the line voltage is
normal, transfer to line will take place within about 3 seconds.

The power switch is also used to restore operation when the inverter has shut
down because of a continuous overload.  When this occurs, switching to OFF and
then to ON will restart the inverter.

Indicator Light

The indicator light on the power switch is on when the power is present at the
output receptacles.


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB001 Pg002


Audible Alarm

A beeper sounds, once every 8 seconds, when the system is operating from battery
power.  If the outage persists until the batteries are discharged, the beeper
will continue to sound until the power switch has been turned off.


ORIGINATOR: JAVIER VAN OORDT Revised by J. VanderHeyden
MODIFIED BY: Norm Jones


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB001 Pg003


FIB 00002                                                             06/24/86

                        *** TOPAZ UPS -  Voltage Adjustments ***

CAUTION: * The batteries in the U.P.S have a very high short circuit
           current capacity! Personal injury can result during service
           by unqualified personal.

         * High Voltages can be present inside this unit with or without
           A.C.power connected, The red indicator will light whenever
           the output recepttcle is energized.

ADJUSTMENT           COMPONENT      LIMITS 60HZ          LIMITS 50HZ
---------------------------------------------------------------------------

Low A.C. line           R31        102 +or- 1 VAC       187 +or- 2 VAC(220)
    Transfer:                                           195 +or- 2 VAC(230)
                                                        204 +or- 2 VAC(240)
---------------------------------------------------------------------------
Inverter Output                                                              
Voltage (no load):      R89        120 +or- 1 VAC       220-240 +or- 2 VAC
---------------------------------------------------------------------------
Battery Check
      Voltage:          R85        27.6 +or- 0.1 VDC    27.6 +or- 0.1 VDC
---------------------------------------------------------------------------
Inverter
Frequency:              R13        60 +or- 0.5 HZ       50 +or- 0.5 HZ
---------------------------------------------------------------------------

No attempt should be made by the field engineer to adjust R85 or R13.
These resisters are factory adjusted for optimum operation. Maladjustment
of these resisters can result in sever damage to the unit.

To adjust R89: (All units disconnected from the U.P.S.)

        1. Set On/Off switch to Off.

        2. Unplug U.P.S. from the power line.

        3. Remove the four screws that secure the top cover from the sides
           of the U.P.S.

        4. Connect a voltmeter between the Hot and Neutral terminals at the
           output receptacle. Do not use the Ground terminal.

        5. Set the On/Off switch to On.

        6. While observing the inverter output on the voltmeter, set the
           voltage adjust pot. R89. For 120VAC operation - set R89 for
           120VAC. For 240VAC operation - set R89 for 240VAC. There should
           not be any load connected to the U.P.S. during this adjustment.

To adjust R31: (Batteries must be connected)

        NOTE: There is a normal time delay between varying R31, and any
              observed result.

        1. This adjustment normally requires an output adjustable trans-
           former.

        2. Adjust this transformer for the lower limit at which the

LINE CONDITIONER-ALL-UPS, MISC----------------------FIB002 Pg001


           switch to battery should occur, i.e.: For 120VAC operation -
           limit is at 102VAC, +or- 1 volt: For 240VAC operation - limit
           is 204VAC, +or- 2 volts.

        3. If it is necessary to adjust R31 and no adjustable transformer
           is available, wait until the time of day when electricity usage
           is at its peak. This will assure you that the adjustment will be
           made at some level below the normal voltage supply. (During time
           of peak usage, voltage supply levels can easily reach 110VAC.)

   Procedure:

        1. Wait until peak- usage period or install varible transformer.

        2. Turn R31 fully clockwise. Wait until transfer to line occurs.
           (Fan stops turning)

        3. Slowly adjust R31 counter-clockwise until transfer to Inverter
           occurs. (Fan starts turning)

        4. If an adjustable transformer was used during the above adjustment
           disconect it - you are finished. Proceed to step 5 only if an
           adjustable transformer was NOT used.

        5. Slowly turn R31 clockwise until transfer to line reoccurs.
           (Fan stops turning)

           Preforming step 5 will assure operation down to just above the
           level of peak usage.

           Remember, the higher R31's thershold of adjustment is, the more
           sensitive the U.P.S. will become during times of peak electricity
           usage.


ORIGINATOR: Pete Koehler


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB002 Pg002


FIB 00003                                                             07/07/87

        *** UPS information for the Basic Four 2000 and 3000 systems ***

 The UPS (Uninterruptible Power Supply) that MAI Basic Four sells for the MAI
2000/3000 system is not a Line Conditioner.  The UPS is a Battery Backup Unit.

 The purpose of the UPS is to allow you to do a proper shutdown, in the case of
a power outtage without loosing any critical files.

 The MAI 2000 and the MAI 3000 do not use the same kind of UPS.

 Listed below are the Uninterruptable Power Supplies available for both systems.

For the MAI 2000 system

o  Part Numbers:  400578-003  120v /60 Hz     400 VA   MM533070
                  400578-004  220v /50 Hz     400 VA
                  400578-006  230v /50 Hz     400 VA
                  400578-007  240v /50 Hz     400 VA

For the MAI 3000 system

o  Part Numbers:  400651-001  120v /60 Hz     1300 VA   MM535075
                  400651-002  220v /50 Hz     1300 VA
                  400651-003  230v /50 Hz     1300 VA
                  400651-004  240v /50 Hz     1300 VA

Note:   If you want to use a Line Conditioner, it is recomended to put the line
        conditioner first followed by the UPS and last the CPU.

Power         Line
Outlet        Cond.        UPS          CPU
 ____         ____         ____         ____                                 
|    |       |    |       |    |       |    |                                
|    |-------|    |-------|    |-------|    |
|____|       |____|       |____|       |____|                                

ORIGINATOR: C. Figueroa


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB003 Pg001


FIB 00004                                                             03/26/90

        *** TOPAZ UPS Battery Testing/Replacement - Revised 3/26/90 ***

Reference:   MM533071/400578      UPS, Topaz 400 VA w/o batteries.
             MM535076/400651      UPS, Topaz 1300 VA w/o batteries.
             MM533080/105-00002   Battery, Topaz UPS, 12 VDC

The Topaz UPS is no longer available with batteries, this FIB addresses
field battery troubleshooting and replacement procedures.

The batteries should be considered first when the inverter fails to turn on or
when the inverter shuts down automatically after running only briefly.       

Two 12-volt batteries connected in series provide 24-volt DC power to the
inverter. Normal batteries being discharged by an operating inverter
eventually reach the 19-volt automatic shutdown level.  The discharge rate
when operating in power-fail mode is approximately 80 - 100 Amps.  The
batteries are rated at 30 Amp/hours.

The internal charger (27.6 volts output) will trickle charge partially
discharged batteries until they reach full charge --this takes approximately
16 hours. The charger will not attempt to charge fully discharged batteries
(below 19 volts.)

Batteries fully discharged may be removed and recharged externally using a
12-volt automotive battery charger as indicated elsewhere in this FIB, or
replaced if defective.

NOTE: It is important to review the procedures in this FIB prior to performing .
      battery replacements. Also it is important to place the UPS in a good
      work environment (sufficient lighting & space) prior to working on it.


                          ***** REQUIRED HARDWARE *****

1. Battery load tester

   100 Amp. Automotive Battery Tester - DAYTON type 4Z581B - purchase locally
   from W. W. GRAINGER - price approximately $60.00 - or substitute equivalent .
   load tester from mail-order automotive parts/accessory outlet (J. C. WHITNEY
   catalog number 13-5467A is equivalent at a similar price if you are not in
   a location convenient to W. W. GRAINGER.)

2. Capacitor charge/discharge resistor

   100 ohm 10 watt resistor, 16 AWG wire, and alligator clips

3. Replacement battery terminal bolts - 4 required per battery set

   1/4" carriage bolts - 1/4 20 threads, 3/4" long

4. Automotive 12V battery charger, MAXIMUM CHARGING RATE OF 6 AMPS


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB004 Pg001             
These hardware items will have to be purchased locally. Possible sources are:

      100 ohm resistor.....Radio Shack
      wire.................Radio Shack
      alligator clips......Radio Shack
      6 AMP 12V charger....Sears/auto parts store                            
      1/4" carriage bolts..hardware store


                 ***** TESTING THE BATTERIES BACKUP POWER *****

The best test for the batteries is to force the UPS inverter into operation
under normal load and measure the backup time available. Proceed as follows:

o  Recharge the batteries on the internal charger for at least 16 hours before
   testing.

o  Verify load of the devices connected to the UPS. Do not exceed recommended
   maximum:

   -  400VA UPS, maximum load: 325W, typical load: 1 2000 CCA and 1 terminal.
   - 1300VA UPS, maximum load: 1000W, typical load: 1 3000 CCA and 1 terminal.

NOTE: IF THE SYSTEM IS A MULTI-USER UNIX/UNOS ENVIRONMENT (SPx, GPx, etc),
      ENSURE THAT IT IS 'SHUTDOWN' PRIOR TO THIS TEST.

o  Remove AC power cord to simulate a power failure condition and measure
   backup time available:

   -  400VA UPS, minimum backup time: 20 minutes at maximum load.
   - 1300VA UPS, minimum backup time:  8 minutes at maximum load.

Replace the batteries if the backup power available is below the minimum or if
the UPS fails to go into inverter mode. Useful general information:  Average
operating time on fully-charged batteries with NO LOAD is 30 minutes.  If the
UPS is to be attached to an AC circuit that will be interrupted by a timer or
manually turned OFF when the UPS-attached system is also turned OFF, the UPS
itself must also be turned OFF to prevent it from discharging its batteries
during these normal periods of power-interruption.


                  ***** REMOVING THE BATTERIES FROM UPS *****

1. Turn the UPS ON/OFF switch to OFF, unplug the A.C. cord from wall
   receptacle, and remove the cover.


          ****************** WARNING ***********************
          High voltages can be present inside the UPS with
          or without the AC input cord connected.

          ****************** WARNING ***********************
          The batteries have a high short-circuit capacity.
          Mistakes in connecting or disconnecting can cause
          severe burns. Eye protection and rubber gloves
          should always be worn when working with batteries.
          Remove all jewelry from your hands.

          ******* SPECIAL WARNING FOR THE 1300 VA UPS *******
          When replacing the cover, position the paper insulator

LINE CONDITIONER-ALL-UPS, MISC----------------------FIB004 Pg002


          over the terminals on the large cables near the regulator
          to prevent a short circuit between terminals and cover.            


To remove the batteries, follow the following instructions, DO NOT follow
the instructions affixed to the UPS cover.


                           UPS Top View
                     _________________________
                    |            |            |
                    |            |            |
            Rear    | +        - | +        - |    Front
                    | 1        2 | 3        4 |
                    |____________|____________|

                    Figure 1.  Battery Posts
NOTE: Model 84130-54 (and possibly other models with surge suppression) with
      surge suppression PCBA has this PCBA mounted in the battery tray area,
      and it must be removed prior to battery removal. Remove the two PCBA
      mounting screws, tag and remove the five wires attached to the PCBA,
      remove PCBA and position wires out of the way of the batteries.

Follow the following disconnect sequence:

1. Disconnect post # 1 and insulate the wire that was removed from this post.
2. Disconnect post # 2 and slide left battery out.
3. Disconnect post # 3 and slide right battery out. Post 4 can be disconnected
   after the battery is removed.

To prevent arcing while working on the unit and when reinstalling the wires:

1. Discharge filter capacitors using a 100 ohm, 5 watt resistor by touching
   the battery output leads that were connected to posts 2 and 3.

2. Recharge capacitors before reconnecting the last wire (post # 1) by
   connecting the 100 ohm resistor in series between the wire and the battery
   post.


               ***** TESTING THE BATTERIES REMOVED FROM UPS *****

This section is divided in 2 parts. Part 1 is to test the batteries before
recharging to eliminate defective batteries. Part 2 is to test the batteries
after recharging.


PART 1- TESTING BATTERIES BEFORE RECHARGING:                                 
1. Allow the batteries to stabilize for at least 30 minutes before taking
   voltage measurement.

2. Measure individual battery voltage without a load using a Digital Voltmeter:

   o  If voltage is less than 11.95 volts, the battery has been discharged
      beyond a safe level and is probably defective. It should be replaced.

   o  If voltage is greater than 11.95 volts, the battery may be recharged and
      tested under load.  Recharging may be able to restore normal operation.

PART 2 - TESTING THE BATTERIES AFTER RECHARGING:                             

LINE CONDITIONER-ALL-UPS, MISC----------------------FIB004 Pg003


1. Recharge the batteries for 16 hours using the internal UPS charger or
   using an external charger as indicated elsewhere on this FIB.


2. INDIVIDUAL batteries should be tested under load to obtain reliable results.
   Use the Automotive Battery Load Tester (Item 1 of Required Hardware above).

3. Observing polarity, connect Tester across the battery.  Observe the meter
   on the Tester.  The indicated Voltage should be well into the green range
   marked "GOOD".

4. Transfer the momentary-switch on the Tester to connect the load accross
   the battery.  Hold the switch transferred for about 3 seconds after it
   stops bouncing.  It should remain steady during this period.  Observe the
   reading.  Do not exceed ten (10) seconds of continuous load-testing during
   any sixty (60) second period.  Re-test only as needed to ensure that the
   clips are making good contact with the battery terminals.                 

   o  If voltage indicated is below the Green 'GOOD' range, the battery is
      defective.  It should be replaced.

   o  If voltage indicated is in the Green 'GOOD' range, the battery is fully
      charged and capable of 100 Amps discharge rate.  It should operate
      correctly in the UPS.


                      ***** RECHARGING THE BATTERIES *****                   
The batteries may be recharged using the UPS internal battery charger or may
be removed and recharged externally using a 12-volt automotive battery charger
as indicated elsewhere in this FIB.


Recharging with the internal battery charger:
--------------------------------------------                                 
o  Remove all the loads from the UPS output receptacle.

o  Plug the UPS to the AC power line, and turn the UPS ON/OFF switch to ON.

o  The red indicator light should illuminate when the charger is working.

o  Time required to recharge the batteries:
   -  16 hours to recharge 90% (minimum required).
   -  48 hours to recharge 100%

o  If the indicator will not light, the charger is not working probably due to
   very low battery voltage. The practical solution is to replace the
   batteries or recharge them externally.

Recharging the batteries with an external charger:
-------------------------------------------------
o  Batteries should be removed from the UPS to be charged individually.

o  Use a 12-volt automotive battery charger rated at 6 Amps or less to
   recharge the batteries for about 10 hours, or follow manufacturers
   recommendations concerning the time required to recharge the batteries.

o  Do not use battery chargers with a capacity larger than 6 Amps because
   larger currents may cause battery explosion.

   +++ CHARGING CURRENT MUST NOT EXCEED 6 AMPS. +++
   +++ CHARGING VOLTAGE MUST NOT EXCEED 14.4 VOLTS +++

LINE CONDITIONER-ALL-UPS, MISC----------------------FIB004 Pg004


                       ***** RECONNECTING BATTERIES *****

The 1/4" carriage bolts (1/4-20 threads, 3/4" long) should be used to replace
the 3/4" long, 1/4-20 bolts used for connecting the wires to the battery posts.
Insert the carriage bolts from the inside of the battery cavity in the UPS.
This will allow easy handling of the wires, flat washer, and nut from the
outside of the battery cavity and the carriage bolts will not spin as the nuts
are tightened.


                           UPS Top View
                     _________________________
                    |            |            |
                    |            |            |
            Rear    | +        - | +        - |    Front
                    | 1        2 | 3        4 |
                    |____________|____________|

                    Figure 2.  Battery Posts

Follow the following reconnect procedure:

1. Reconnect the wire removed from post 4 prior to installing in the UPS.
2. Insert the batteries in the UPS.
3. Connect battery posts 3, and 2.
4. To prevent a spark, connect the 100 ohm resistor between battery post 1
   and the wire, wait 10 seconds, then connect the wire to post 1.
5. If the surge suppression PCBA was removed, reconnect wires, remount PCBA.


ORIGINATOR: JAVIER VAN OORDT
MODIFIED by: Norm Jones/John Tank/John VanderHeyden


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB004 Pg005


FIB 00005                                                             03/21/90

                                *** Deleted ***
ORIGINATOR: N. Jones


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB005 Pg001


FIB 00006                                                             08/09/89

                       *** Power Conditioning Devices ***

 This Field Information Bulletin addresses Power Conditioning devices in a
 manner consistent with the MBF marketing approach. However prior to
 discussing Power Conditioning devices, the need for correct wiring and
 grounds must be addressed. These devices do a good job but they are not
 magic, they must have correct wiring and grounding for them to work properly.
 If the input wiring and grounding is not correct the Power Conditioning
 Devices may in fact make matters worse.

 The input AC wiring should be verified according to ENVIRONMENTAL HANDBOOK  
 FIB 12 (Building Wiring Verification) prior to installing any Power
 Conditioning Device.


 THE ABCs OF POWER PROTECTION
 ----------------------------                                                

 AC power conditioning devices can be grouped into five categories. These
 categories will be referred to as A, B, C, D, & E throughout this FIB. These
 are:

 [ A ] Surge Protector: Shields computer equipment from high intensity
                        impulses, or spikes greater than 250V (above or below
                        ground potential).

                        These devices may use a variety of components such as
                        MOVs (Metal Oxide Varisters), Silicon Avalanche Diodes
                        (frequently referred to as Transorbs), and Gas Tubes.

 [ B ] Isolation Transformer: Establishes a new neutral-to-ground reference,
                              therefore eliminates neutral-to-ground noise
                              (frequently referred to as 'COMMON MODE NOISE').

 [ C ] Power Line Filter: Reduces oscillatory noise such as transients or
                          hash which are of a higher frequency than the 60HZ
                          AC sine wave.

 [ D ] Voltage Regulator: Brings varying input AC voltage into specification.
                          The switch mode power supplies in MBF 1200 systems
                          through the Advanced Series systems will tolerate a
                          wide voltage range, and a [ D ] should not be
                          necessary.

                          These may be Ferroresonant Transformers or Tap
                          Switching devices.

 [ E ] Battery Backup: Provides a source of standby power in the event of a
                       black-out or severe brown-out.                        

                       These include Standby UPS (switches to battery backup
                       after AC loss sensed), On-Line UPS (battery supplies
                       AC power at all times), and RUPS (battery powered
                       motor generator)

 A "COMPLETE" power conditioning system would include all of these components
 ([A], [B], [C], [D], and [E]). The components may be separate or have several
 of them combined into a single package.


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB006 Pg001


   An example of combining packages is the Power Protection Pak offered by MBF
   for the SPx and DSxx systems which consists of:

                    1) a Power Conditioner: [A] [B] [C] device
                    2) a UPS:                   [A] [E] device
                    3) the switching power supply:  [D] device

                    combined they form: [A] [B] [C] [D] [E]


 DESCRIPTION OF MBF POWER PROTECTION PRODUCTS
 --------------------------------------------                                

           UNINTERRUPTABLE POWER SUPPLIES (STAND-BY UPS) [A] AND [E]

 MBF offers two UPS models, a 325W and a 1000W UPS. These cover systems      
 ranging from the MAI 1200 to the MAI 4000. They are NOT rated for use on MPx
 or Advanced Series systems.

 These stand-by UPS units contain spike protection (the original models sold
 did not contain spike protection) as well as battery back-up.

 Some system configurations may require multiple UPSs (such as a 4000 system).

             MARKET CODE   DESCRIPTION
             -----------   -----------------------------------               
             ZA034AA       UPS w/Spike Suppression, 325W
             ZA035AA       UPS w/Spike Suppression, 1000W


                     POWER CONDITIONERS [A], [B], and [C]

 MBF offers three power conditioner models; 4 AMP (.48 KVA), 8.3 AMP (1 KVA),
 and 13 AMP (1.5 KVA)

 These units combine a surge protector [A], an isolation transformer [B], and
 a power line filter [C] in a single package.

             MARKET CODE   DESCRIPTION
             -----------   -----------------------------------               
             ZA041AA       Power Conditioner, 4A
             ZA042AA       Power Conditioner, 8.3A
             ZA043AA       Power Conditioner, 13A


             SURGE PROTECTORS FOR WORKSTATIONS AND PERIPHERALS [A]

 MBF offers eight different surge protector models.  These are recommended for
 use only with workstations (DS 500, 1200) and peripherals.

 Surge protectors:

 MARKET CODE   DESCRIPTION
.-----------   -----------------------------------------------------------------
 QN016AA       CL6 Clip Strip - six outlet strip with surge protection, master
               on/off switch and 6' cord

 QN021AA       DS2 Surge Sentry - two outlet wall unit with surge protection,
               and status light

 QN022AA       DS4 Surge Sentry - four outlet surge protector with master on/off
               switch, 6' cord, resettable circuit breaker and status light

LINE CONDITIONER-ALL-UPS, MISC----------------------FIB006 Pg002


 QN023AA       DS6 Surge Sentry - six outlet surge protector with master on/off
               switch, 6' cord, resettable circuit breaker and status light

 QN006AA       DSD Surge Sentry & Dropout Protector - Four outlet protector with
               master on/off switch, resettable circuit breaker, surge
               protection status light, and status indicator light. In the event
               of a voltage drop, the unit keeps power off until the user
               restores it by pressing the reset button. This manual restore
               requirement prevents damage to equipment as a result of surges or
               spikes that occur when power is automatically restored after a
               blackout or brownout.

 QN014AA       DSLP Surge Sentry FAX Protector - One outlet surge protector with
               two additional RJ11 jacks to protect data lines from damage.
               Includes status indicator light and 6' cord.

 QN015AA       DS4LP Surge Sentry Modem Protector - Four outlet surge protector
               with 2 additional RJ11 jacks to protect data lines from damage.
               Includes status indicator light and 6' cord.

 QN012AA       DSDLP Surge Sentry Disk and Modem Protector - Four outlet surge
               protector with 2 RJ11 jacks and dropout protection for MAI 1200
               class disk drives. Includes surge protection status light, 6'
               cord, and resetable circuit breaker.


 SELECTING A MBF STAND-BY UPS OR POWER CONDITIONER FOR A SYSTEM
 --------------------------------------------------------------              

 This table shows the size and quantity of UPS and Power Conditioners for the
 various MBF systems. (2) denotes 2 units required.

 CCA OR PERIPHERAL                     UPS         POWER CONDITIONER         
 -------------------------------     ---------     -----------------
 MPx or Advanced Series CPU................N/A............13A
 Chassis (not doublewide)

 Advanced Series doublewide................N/A.........(2) 13A
 CPU chassis

 Fixed Disk module (tall cabinet,..........N/A.............13A
 MPx or Advanced Series)

 Fixed Disk module (short cabinet,.........N/A............8.3A
 MPx or Advanced Series)

 MAI 4000 CPU chassis (2)............(2) 1000W........(2) 8.3A

 MAI 3000 CPU chassis....................1000W............8.3A

 MAI 2500 CPU chassis....................1000W............8.3A

 MAI 2000 CPU chassis.....................325W............4.0A

 MAI 1800 CPU chassis.....................325W............4.0A

 MAI 1500 CPU chassis.....................325W............4.0A

 MAI 1200 CPU chassis.....................325W............4.0A

 DS500 Workstation........................325W............4.0A

LINE CONDITIONER-ALL-UPS, MISC----------------------FIB006 Pg003             

 PERIPHERAL POWER RATINGS
 ------------------------                                                    

 The chart below shows the power consumption in watts for various peripherals.
 This can be used to calculate which UPS and/or power conditioner a customer
 may need. Up to four of these devices can be plugged into any UPS or power
 conditioner as long as it does not exceed it's rated capacity.

 NOTE: Printers must NEVER be plugged into the same UPS/Power Conditioner a
       CPU or Disk is connected to. Printers are notorious noise generators
       and MUST be kept seperate from CPUs and Disks.


             Peripheral                   Power Rating
             -----------------            ------------
             PT-4201 Printer..................800W
             PT-4214 Printer..................200W
             PT-4215 Printer..................150W
             PT-4216 Printer...................60W
             PT-4217 Printer...................35W
             PT-4218 Printer...................35W
             PT-4220 Printer..................630W
             PT-4221 Printer.................1400W
             PT-4222 Printer..................140W
             PT-4223 Printer..................720W
             DT-4313 Terminal.................100W
             DT-4314 Terminal.................100W
             External 60MB MCS................325W
             External 120 MB MCS..............325W
             1/2" MTS.........................325W
             1/2" GCR.........................600W

             UPS or Power Conditioner     Power Rating
             ------------------------     ------------                       
             325W UPS.........................325W
             1000W UPS.......................1000W
             4A Power Conditioner.............480W
             8.3A Power Conditioner..........1000W
             13A Power Conditioner...........1500W


 CONFIGURING POWER PROTECTION PRODUCTS
 -------------------------------------

 When installing a Power Conditioner and a UPS on the same device the Power
 Conditioner should be placed ahead of the UPS (on the AC input side). The
 reason for this arrangement is that there is some power loss in the Power
 Conditioner and this will impact the UPS's back-up time.

              ___________________       _____       _____
             |                   |     |     |     |     |                   
      AC-----| Power Conditioner |-----| UPS |-----| CPU |
             |___________________|     |_____|     |_____|


 MAINTENANCE ON THE POWER CONDITIONING DEVICES
 ---------------------------------------------

 NACS will service all of the Power Conditioning Devices.

LINE CONDITIONER-ALL-UPS, MISC----------------------FIB006 Pg004


 The Power Conditioners and Surge Protectors will be replaced as whole units.
 Both of these come with a five year warranty, units returned to MBF will be
 returned to the manufacturer for new ones.

 The Power Conditioners and Surge Protectors may be tested as follows:

    1. Observe the units for physical damage as they may suffer damage in the
       process of diverting the energy if there is a lightning strike nearby.

    2. Use an ECOS 7106 to test the Power Conditioner, all tests except the
       Neutral to Ground short test should pass, the Neutral to Ground short
       test should indicate a Neutral to Ground short on a good unit. The reason
       for this indication is the isolation transformer included in the Power
       Conditioner has a Neutral to Ground bond inside.

    3. If steps 1 and 2 do not indicate a failure but the unit is suspected of
       not working properly replace it.

 The stand-by UPSs are already maintained by NACS and the adjustment procedures,
 battery testing, and battery replacement procedures are covered in FIBs in this
 FIB group. Battery replacement is not included in the UPS maintenance
 agreement, they are a customer responsibility and should be replaced every two
 years. Additionally the UPS should be tested during every system PM.        

             MARKET CODE   DESCRIPTION
             -----------   -----------------------------------               
             ZA050AA       UPS Replacement Batteries

ORIGINATOR: N. Jones


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB006 Pg005


FIB 00007                                                             09/08/89

         *** Topaz UPS Covers no Longer Refurbished, Use Customer's ***

 The Topaz UPS covers will no longer be refurbished at the Repair Center, they
 will only be cleaned. The customer's original covers should be reused and the
 covers from the spare placed on the defective UPS for protection during
 shipment back to the Repair Center.

 As these covers which are used for protection during shipment will get a
 great deal of wear and tear, they may become unsightly. It is a good idea to
 remove the covers before taking to the customer location. The customer may be
 distressed to see the repaired unit in less than new appearance.


ORIGINATOR: Norm Jones


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB007 Pg001


FIB 00008                                                             02/14/90

     *** Testing for UPS batteries with 'open' cells - revised 2/14/90 ***   

SYMPTOM:  Batteries meter good unloaded, but UPS does not operate.

PROBLEM DETERMINATION:  Measure battery voltage while UPS is attempting to
                        start 'power-fail' operation.

FIX:  Replace battery showing voltage-drop when loaded.

The following text and procedure aids in determining whether the UPS is the
cause of apparent failure, or if one (or both) of the batteries may be showing
the 'open-cell' failure-mode common to lead-acid or 'gel-cell' batteries.  It
is assumed that the batteries in question have already been measured under no-
load conditions, and that the Voltage present is that of a fully-charged unit.
Unless the batteries have been tested with an Automotive-type 100 Amp load-
tester according to FIB 0004, the following symptoms may still apply:

- The 'open-cell' failure is really a high-resistance connection between the
  internal cells of a storage battery.  When only a minimal load is present
  (such as a meter or lamp), the Voltage is normal or even slightly high if
  recently charged.

- When connected to a 'quick-charger' capable of several Amps capacity, the
  battery 'draws' little or no current relative to a normal discharged battery,
  but the Voltage rises almost immediately to the charger 'float' Voltage.

- In a no-load state, the Voltage remains at the fully-charged level, but when
  loaded to relatively high current demand, the Voltage drops far below that of
  the nominal Voltage level of a charged unit.

The TOPAZ UPS has a 'battery-saver' circuit which senses when the nominal 24
Volt battery level drops below 19 Volts, at which time it shuts off the power-
conversion circuits to prevent 'deep-discharging' the batteries - a state from
which they may not recover.  This 'battery-saver' circuit reacts so fast that
the drop in Voltage across an 'open-cell' battery can only be observed for a
half-second or so. This quick responce may cause difficulty in observing it with
a DVM due to the slow sample rate of the DVM, an analog meter (Triplet 310) or
an oscilloscope in auto sync mode may be required to see it.

The process in FIB 0004 calls for a 100-Amp load-tester to test for this
condition, but the following procedure can be used if the tester is not
available immediately:

1.  Unplug and open the UPS and attach a meter across each battery. Set the
    meter to 15 or 20 Volts full-scale.  If you have only one meter available,
    repeat the test process twice with the meter across each battery in turn.

2.  Connect the UPS to an AC outlet and turn it ON.  It should start up the
    power-conversion circuit for 2 to 3 seconds before switching to stand-by
    (trickle-charge) mode.  If it does, verify that each battery now reads 12.5
    to 14.0 Volts and proceed to step 3.

    If the UPS does not start, observe the meter(s) while turning it OFF and
    back ON.  If the voltage reading of either battery is observed dropping to
    less than 8.0 Volts, or if the combined Voltage drops below 19.0 Volts, one
    or both of the batteries has an 'open-cell' or a battery cable connection
    is loose.


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB008 Pg001


3.  If the UPS functioned correctly in step 2, observe the meter(s) while
    performing a 'power-fail' by unplugging the UPS from the AC outlet.
    The UPS should immediately turn on the power-conversion circuits and
    the fan.  It should 'beep' after about 30 seconds, and every 30 seconds
    thereafter.  Battery voltage should be approximately 10.5 to 11.5 Volts.

    If instead, the output of either battery drops below 8.0 Volts when the
    power-converter attempts to start, the 'battery-saver' will shut off the
    converter before any other visible evidence of the converter is seen.

    If both batteries appear to maintain normal Voltage at the time the AC
    is removed, but the UPS does not start, it is probably defective.

ORIGINATOR: J. VanderHeyden


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB008 Pg002


FIB 00009                                                             03/06/90

             *** Battery Connections for Topaz Model 84130-01AA ***

 The Topaz model 84130-01AA UPS without batteries may come from spares with four

 wires in the battery cavity for connection to the batteries rather than the
 normal Topaz UPS configuration of two wires for battery connection.

 The wires can be connected in one of the following ways:

  NOTE: The wire from E2 to battery 1 minus (-) may connect via a terminal
        labeled E on a transistor block on some units. As long as there is a
        connection from terminal E2 to battery 1 minus (-) this is okay.
   Method 1 - This wiring method uses the wires in the battery cavity as they
              came from spares and requires no rewiring but the connection
              scheme is somewhat illogical.

                    BAT 2             BAT 1
                  +|   |   -  125A  +|   |  -
          E1---O---| | |  |---o~~o---| | | |---E2
               ^   |   |        ^    |   |                                   
               |                |                                            
               |                |                                            
         LARGE TERMINAL      FUSE F2
        JUST DOWN FROM E1


   Method 2 - This wiring method requires some rewiring using the existing
              battery connection wires, however it is a more logical wiring
              scheme.

                           BAT 2       BAT 1
                   125A  +|   |  -   +|   |  -
          E1---O---o~~o---| | | |-----| | | |---E2
               ^     ^    |   |       |   |                                  
               |     |                                                       
               |  FUSE F2
               |
        LARGE TERMINAL
       JUST DOWN FROM E1


ORIGINATOR: Norm Jones


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB009 Pg001


FIB 00010                                                             07/06/90

          *** Spare Batteries Won't Fit In All Models of Topaz UPS ***

SYMPTOM/TEXT: MBF is now supplying batteries made by Panasonic, PN LCL12V33P.   
Due to their construction they are too wide to fit in the Model 84130-01AA      
Topaz UPS.

FIX: Remove the plastic insulating strip on the right side of the unit to       
gain additional width. Batteries will now slide in. Save plastic strip by       
taping it inside unit, if ever needed in future.
ORIGINATOR: John Tank


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB010 Pg001


FIB 00011                                                             07/09/90

              *** Wiring of Line-Conditioner PCBA on -54 Units ***

SYMPTOM: Blows line fuse after battery installation.

PROBLEM DETERMINATION: Wiring of Line-Conditioner PCBA incorrect.

The Tustin Repair Center reports several UPS units were returned with the main
input fuse blown due to mis-wiring of the Line-Conditioner PCBA after it was
removed for battery installation.  The cause seems to be an extra FASTON lug
for the Ground circuit on one end of the PCBA (normally unused on 115 Volt
units), and the fact that TOPAZ sometimes mounts the Line-Conditioner PCBA
inverted (upside-down) from the illustration below.  The fuse is being blown
due to the LINE INPUT wire being plugged erroneously on the extra G terminal.
The correct wiring for the Line-Conditioner PCBA is:

  NEUTRAL OUT (WHITE WIRE # 55)
                 ------------------.
                                   |
 LINE OUT (BLACK WIRE #54) .-------|------.     GREEN/YELLOW WIRE FROM FRAME
           ----------------|-[]L  []N  []G|--------------------
                           | =====  ===== |                                  
                           |    =====     |
                           | #####  ##### |                                  
                           | #####  ##### |                                  
                           | #####  ##### |                                  
     FROM LINE FUSE        |  ###    ###  |
 LINE IN (BLACK WIRE #53)  |              |
           ----------------|-[]L  []N  []G|  NO WIRE TO THIS (G) TERMINAL
     FROM LINE CORD        |______|_______|
 NEUTRAL IN (WHITE WIRE NO #)     |
           -----------------------'

 Please note that the orientation of the PCBA is not critical, and it may be
 inverted from this illustration.  It is only important to keep the input and
 output circuits grouped at each end of the PCBA and the LINE and NEUTRAL wires.
 on the correct terminals: WHITE = NEUTRAL (CENTER 'N' TERMINAL),  BLACK = LINE
 (OUTSIDE 'L' TERMINAL),  GREEN/YELLOW = FRAME GROUND ('G' TERMINAL).

 The PCBA silk-screened labeling 'INPUT' and 'OUTPUT' should not be considered
 as being critical, since it functions in either orientation, and has been used
 both ways by the manufacturer.

ORIGINATOR: J. VanderHeyden


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB011 Pg001


FIB 00012                                                             07/16/90

             *** Line Fuse Part Numbers for 115 Volt UPS Models ***

In the event of a blown line fuse, please use the correct type as replacements
whenever possible, as the UPS requires a Slo-Blo (Time-Delay) fuse.  The MBF
Inventory Control Numbers are shown below.

UPS SIZE    LINE FUSE TYPE             MBF ICN   USPS DESCRIPTION
--------    ------------------------   --------  ----------------------      
 450 VA     BUSSMAN MDA-10             YY005846  FUSE 10A 250V SB
         or LITTLEFUSE 3AB/326 10Amp

1350 VA     BUSSMAN MDA-15             YY019822  FUSE 15A 250V/MDA-15
         or LITTLEFUSE 3AB/326 15Amp

These may be purchased locally if desired.  Avoid Code A orders on these items.

ORIGINATOR: J. VanderHeyden


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB012 Pg001



FIB 00013                                                             01/07/91

                               *** Exide UPS ***


   MAI is now shipping Exide 'UPS'.  Exide has not given MAI the
   authorization to install or service these units. The standard
   warranty is:  2 years - mail-in only  - 1 KVA units
                 2 years parts, 90 days labor- 3 KVA and 5 KVA units

   MAI is still negotiating details with Exide on service. In the
   interim, DO NOT attempt to install any Exide 'UPS' and DO NOT open
   any of the units up - THIS WILL VOID OUR WARRANTY!

   The 1 KVA units are user installable and should be shipped to
   Exide for repair.

   The 3 KVA and 5 KVA units are not user-installable. Most
   customers will purchase a start-up package which includes
   an Exide rep installing the unit. The start-up package
   increases the labor warranty from 90-days to 1 year.

   FE's should only have to co-ordinate with Exide for the
   start-up package if they originally sold the UPS. Otherwise,
   SDC or the account rep is supposed to make the arrangements.
   If an FE is requested to install a UPS, or for any other
   questions, they should call one of the 800 numbers provided
   from Exide for MAI:

    WESTERN REGION:   1 (800) 333-9433

    CENTRAL REGION:   1 (800) 733-9433

    EASTERN REGION:   1 (800) 678-2111


   More specifics will be forwarded when available.


ORIGINATOR: Susan Peacock


LINE CONDITIONER-ALL-UPS, MISC----------------------FIB013 Pg001