Alpha Technologies USM2.5 Status Monitor - Manual (Page 8)

2. Installation
8 704-683-B0-004, Rev. D
2.1 Inverter Module Removal and Installation
The XM Series 2 Power Supply comes with a field-replaceable Inverter Module, containing
the inverter, battery charger and control logic circuitry. The Inverter Module is designed to
accept USM2.5 plug-in logic upgrades to facilitate remote status monitoring. The Inverter
Module can be removed while the power supply is running on line power. With the Inverter
Module removed, the power supply will continue to operate in a non-standby mode.
Remove the Inverter Module prior to adding the optional USM2.5 circuit board. Follow the
first procedure below precisely.
CAUTION: ALWAYS switch the battery breaker OFF prior to removing the Inverter Module.
XM Series 2 Inverter Module Removal Procedure:
1. Switch OFF the battery breaker. Disconnect the battery input, and the temp
probe cables.
2. Disconnect all remaining cables as needed from the Inverter Module.
3. Loosen the thumbscrews on the Inverter Module.
4. To remove the Inverter Module: grasp ONLY the handle of the Inverter Module,
pull firmly to release the module from the connector. Slide the module
assembly straight out.
5. Disconnect the Ribbon cable attaching the inverter module to the power
distribution board before sliding the inverter module all of the way out. (Refer
to Figure 2-1.)
XM Series 2 Inverter Module Installation Procedure:
1. Attach the ribbon cable to the inverter module.
2. To reseat the Inverter Module: align the metal shield in the upper and lower
card-guides. Using ONLY the Inverter Module’s handle (
absolutely apply no
pressure of any kind to the front panel) firmly drive the module back into the
connectors. The connectors are designed to be made with reasonable force.
The thumbscrews are not intended to aid in making these connections, but
to secure the Inverter Module to the chassis.
3. If the Inverter Module is correctly seated the front panel Smart Display will
start-up, and the “Inverter Disconnected Alarm” will NOT be active.
4. Retighten thumbscrews. It is recommended that screws be tightened by
hand ONLY. Avoid using tools to tighten thumbscrews.
5. Reconnect all the cables (TMPR, XPDR, and SYS COM) as needed to the
Communications Module.
6. Verify that the battery breaker is OFF, reconnect the battery input and the
temp probe cables, verify battery polarity, and then finally switch ON the
battery breaker.
Disconnect here Disconnect here
Unlatch
Figure 2-1, Inverter Module ribbon cable