Alpha Technologies USM2 - Manual (Page 11)

11
©2000 ™
704-587-B0-003 Rev.D
2.3 Inverter Module Removal and Installation, XM2V
The XM Series 2V power module comes with a field-replaceable, Inverter Module assembly containing the inverter and
control logic. The Inverter Module is designed to accept USM (Universal Status Monitor) plug-in logic upgrades to facilitate
remote status monitoring. The removable module is located on the front, right-hand side of the XM2V. Follow the procedure
outlined below to remove the Inverter Module:
CAUTION: ALWAYS switch the battery breaker OFF prior to removing or inspecting the Inverter Module assembly.
NOTE: The Inverter Module assembly can be removed while the power supply is running on line power. The XM2V will
continue to operate as a non-standby power supply.
Handle the Inverter Module with extreme care. Circuit boards and logic upgrades are static-sensitive
and susceptible to damage.
NOTE: When reinstalling the Inverter Module, verify the metal shield is properly seated in the card guides and fully
inserted into the housing.
1. Turn OFF the battery breaker. Disconnect the battery input, and the temperature probe cables from the
Inverter Module. Disconnect the TMPR and XPDR cables from the Communication Module.
2. Loosen the thumbscrews at the top of the Inverter Module.
3. To remove the Inverter Module assembly, grasp the hand hole at the center of the Inverter Module. Pull
firmly to release the module from the inverter connector. Gently slide the module assembly 3/4 of the way
straight out. Disconnect the Inverter Module ribbon cable. The Inverter Module has been designed to be
removed while the power supply is operating on AC line power.
4. To reset the Inverter Module assembly, align the metal shield in the card-guides; reconnect the Inverter
Module ribbon cable and slide the Inverter Module back onto the connector. The thumbscrews are not
intended to aid in making this connection, but to secure the Inverter Module to the chassis.
5. Retighten the thumbscrews.
6. Verify that the battery breaker is still OFF, reconnect the battery input, and the temperature probe
cables, and then finally turn ON the battery circuit breaker.
2. Installation
Figure 2-3; XM2V Power Supply