Changing Installation Rack Modules - ETC SR12D Installation Manual

Changing Installation Rack modules

Module safety stop
Safety stop
securing screws
Figure 8: Setting safety stop
position
Sensor Delta Dimming Installation Guide
All Sensor Delta rack modules slide in and out of their slots and are ready to
start dimming immediately.
Although Sensor modules, including the CEM, can be replaced with power on,
always turn rack power off at the disconnect switch in the Auxiliary bay or at
the main circuit breaker.
Note: Operating a dimmer rack with open module slots disrupts airflow
inside the rack, which can lead to rack overheating.
Releasing and securing module safety stops
To prevent unauthorized access to rack modules and interior wiring, Sensor
Delta Installation Racks are provided with module safety stops that hold
modules in place until released by a service technician.
1. Turn off rack power with the disconnect switches in the Auxiliary bay or at
the main circuit breaker.
Warning!
Rack power must always be turned off before any
maintenance or service is performed that exposes the interior
of the rack. Do not release the module safety stops until
power is turned off.
2. Open the rack door. The safety stops are along the left side of the dimmer
modules.
To release the safety stop, loosen the three safety stop securing
screws and slide the stop to the left to release the modules. It is not
necessary to remove the stop.
To secure the safety stop, slide it back to the right and tighten the
three safety stop screws.
3. Follow the appropriate instructions in your Sensor Users Manual to
remove or replace the desired dimmer or control modules.
11