Operating instructions

6.8 Logic Cards - Installation, Removal and Operation
THE POWER MODULE MUST BE COMPLETELY POWERED DOWN WHENEVER
INSTALLING, REMOVING OR RESEATING A LOGIC CARD. IF NECESSARY, USE AN
APP60S SERVICE POWER SUPPLY TO AVOID INTERRUPTION OF POWER TO THE
LOAD.
Procedure:
1. Switch the module's front panel battery circuit breaker OFF, or remove the fuse.
2. Unplug the module’s power cord or switch the AC input circuit breaker OFF.
3. Wait several minutes for the power module's capacitors to completely discharge.
4. Use the card ejectors to remove the logic card from the card guide. Handle the card
only by the edges to avoid touching static sensitive parts.
5. Plug the new logic card into the card guide (component side facing away from the
module's front panel). Make sure the card is properly seated before restoring power.
NOTE: IF POWER IS RESTORED WITH THE LOGIC CARD REMOVED, THE MODULE
WILL CONTINUE TO OPERATE AS A NON-STANDBY POWER SUPPLY.
6.8.1 SCB (Standard Control Board)
AP Series power supplies come equipped with a field-replaceable, SCB standard control
board that contains the circuitry to monitor incoming AC, charge the batteries and control the
inverter. The board uses a dual-mode (float and equalize) temperature compensated battery
charger to maintain the batteries. It can be equipped with an optional, RTS (Remote
Temperature Sensor) which is attached to the side of the center battery to provide optimum
battery temperature measurements. Battery charging voltages are factory set and do not
require user recalibration unless the logic card has been repaired or has been tampered with.
Custom settings for unique battery types, (other than gelled-electrolyte), must be specified
at the time of order. The SCB can be manually sequenced through its two charging modes
by pressing switch (S1) located on top of the logic card. When lighted, the board's LED
indicates EQUalize charge. When the LED is OFF, the charger is providing a FLOAT charge
to the batteries.
6.8.2 APM (Automatic Performance Monitor)
The APM is field-replaceable and contains the circuitry to monitor incoming AC, charge the
batteries, control the inverter, and self-test the inverter and batteries. Unlike the SCB, the
APM's dual-mode temperature compensated battery charge voltages (float and equalize)
can be selected using rotory switches (S2) and (S3) which are located on top of the logic card.
NOTE: Selecting the correct charging voltage is critical. The APM is pre-set for gelled
electrolyte type batteries (switch S2 in position 5 to produce 40.5 volt float; switch S3 in
position 3 to produce a 41.4 volt equalize charge). Always verify the two switch settings with
the APM chart (section 6.8.2.2) when first installing a power supply, and again during routine
maintenance. Custom settings for unique battery types (other than gelled-electrolyte) or
special charging applications can be selected by changing the two rotory switch settings
according to the APM chart (section 6.8.2.2). Always consult the battery manufacturer's
recommendations before changing switch settings.
The APM can be manually sequenced through its various modes of operation by pressing the
module's front panel TEST/Reset switch, or switch (S1) located on top of the logic card.
When lighted, the APM's four LEDs (DS1 to DS4, respectively) indicate status and fault
conditions: TEST (yellow), EQUalize (green), AC FAIL (red) and DC FAIL (red). When all
four LEDs are OFF, the power supply is in its normal mode, providing a FLOAT charge to the
batteries. The RTS (Remote Temperature Sensor), standard on the APM, connects directly
to the top of the logic card and is routed to the battery compartment. The sensor is then
attached to the side of the center battery to provide optimum battery temperature information
(see illustration on page 22). In the event the RTS is disconnected or not used, a secondary
sensor, located on the APM card, provides temperature compensation based upon the
ambient temperature of the module compartment.
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6. INSTALLATION