030-803-J0 Rev B
Page 12 of 26
5.4
CXCM4 Module Insertion/Removal
Insert by placing the controller on the shelf bottom and sliding the module into the CXCM4 connection interface
(inside of the shelf, see drawing 747-275-08). Apply pressure on the metal faceplate to engage the rear
connectors.
Tighten the screw on the bottom of the faceplate to secure the module to the shelf.
NOTE:
Do not force a module into position if it does not seat properly. All modules are keyed to ensure that the correct
module (voltage/polarity) type is used.
WARNING
Before removing a CXCM4 from a live system, an external LVD override is required to avoid a
disruption of service.
Figure 4–LVD control card option
The LVD Control functions can be hardwired directly from the assigned relay output to an optional LVD override
control and distribution alarm card (shown above).
Place the LVD Control switch to the OVERRIDE IN position to keep the LVD contactor engaged.
To remove a module, loosen the screw on the bottom of the faceplate. Slide the module away from the rear
connectors and out of the shelf.
Insert the replacement controller (as described above). The front-panel LED’s will illuminate temporarily, but will
extinguish after the system has finished its 15 second self-test.
WARNING
Do not leave the switch in the OVERRIDE IN position. Doing so may result in a complete discharge
of the batteries during a power failure situation.
To allow the CXCM4 to resume automatic control of the LVD contactor, return the LVD Control switch to the
AUTO IN position.
OVERRIDE IN or Inhibit
(amber) LED
LVD control switch
AUTO IN (green) LED
