The retrofit, Preparation, Remove the old – ETC Sensor+ Rack (SR+ HSR+) CEM+ to CEM3 Retrofit User Manual
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2
The Retrofit
5
S e c t i o n 2
The Retrofit
Preparation
Step 1:
www.etcconnect.com
).
Step 2:
Turn off main power to the rack(s). Before removing dimmer or control
modules for service, de-energize main feed to dimmer rack and follow
appropriate Lockout/Tagout procedures as described in NFPA Standard
70E. It is important to note that electrical equipment such as dimmer racks
can present an arc flash safety hazard if improperly serviced. This is due
to available large short circuit currents on the feeders of the equipment.
Any work on energized equipment must comply with OSHA Electrical Safe
Working Practices.
Step 3:
Remove the eight dimmer modules above the CEM+ (if retrofitting an SR+48
rack, remove the eight modules below the CEM+ as well). Note and document
the modules’ order/positioning in the rack for proper insertion and configuration
later.
Step 4:
Use a digital voltmeter and VERIFY that power is off by checking voltages for
all combinations between the phase bars, neutral and ground.
Step 5:
Remove the CEM+ from the rack.
Remove the Old
Step 1:
Disconnect the multi-colored DMX ribbon cable and CAT5 cable from the
backplane.
Step 2:
Disconnect the power cable from the rear of the CEM+ backplane.
Step 3:
Disconnect the dimmer output ribbon cables from the backplane. As you remove
the ribbon cables, mark them with a permanent marker to indicate the proper
order for reattachment (Dimmers 1-24, 25-48, and so on). There may be stickers
on the ribbon cables already, however these may refer to cable length and not
dimmer outputs. They should not be used as a reference to these instructions.
Step 4:
Unscrew the backplane metal from the rack. (One screw in each side upper-
corner - two screws total.) Discard these screws. Replacement screws with
thread locker are provided (ETC Part# HW377) and will be used later.
Step 5:
Push the backplane towards the back of the rack to free the backplane side tabs.
Step 6:
Bend the sides in towards the center (out of the sides of the rack).
Step 7:
Pull one side forward to angle the backplane then remove the backplane
metalwork from the rack. Discard the old backplane.
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Remove the
backplane screws