FDX 3000 Dimmer Racks
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Appendix D
FDX 3000 Dimmer Racks
CEM3 may be used as a control module in the ETC FDX3000 dimming system, providing networking
facilities, dual redundant control modules, and precision 16-bit dimming. This appendix provides
information needed to work with CEM3 in an FDX3000 system, as well as outlining the hardware of
your FDX3000 rack.
Hardware
Front Panel
The FDX3000 carrier contains two CEM3 modules in a dual redundant configuration.
PSU Indicators
The PSU indicators show the status of the two internal power supplies that supply the 15 VDC required
by FDX dimmer modules.
The two indicators should be lit at all times. If either is not lit, this could indicate a failure of the internal
power supply. If you see this condition, contact ETC Technical Services (see
Redundant Tracking Switch
The redundant tracking switch allows you to test the ability to switch from the upper (A) processor to
the lower (B) processor. If it is set to the (A) or (B) position, the A or B processor will preferentially have
control. In normal operation, the switch should be set to the center Auto position. This will ensure that
A has control unless communication is lost to A, or certain hardware failures occur on A but not B (for
example if A does not see DMX but B does).
PSU Indicators
Redundant
Tracking
switch
