56 Sensor+ CEM+ User/Config Manual
Releasing and Securing Module Safety Stops (ESR Racks Only)
To prevent unauthorized access to rack modules and interior
wiring, Sensor+ CE Installation Racks (ESR) are provided with
module safety stops that hold modules in place until released
by a service technician.
1. Turn off rack power at the main breaker.
2. Open the rack door. The safety stops are along the left
side of the dimmer modules. See the illustration.
• 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 below to remove or
replace the desired dimmer or control modules.
Remove and Replace a Dimmer or Airflow
Module
1. Turn off rack power at the main breaker, if possible.
2. Open the rack door.
3. Switch the dimmer module’s circuit breaker(s) to the
“off” position (breaker to the right).
• See
Releasing and Securing Module Safety Stops
(ESR Racks Only)
on
page 56
above if appropriate.
4. Grasp the dimmer module by the center of the main air vent.
5. Pull the dimmer straight out.
6. Ensure the circuit breaker(s) on the replacement module are in the “off” position.
7. Insert the replacement dimmer or airflow module into the correct slot and firmly press the
module into the slot until you feel the connections seat (the module face will be flush with the
other modules).
8. Switch the module’s circuit breaker(s) to the “on” position (to the left).
9. Close and lock the Sensor rack door before applying power.
Remove a CEM+ Module
1. Turn off rack power at the main breaker.
2. Open the rack door.
• See
Releasing and Securing Module Safety Stops (ESR Racks Only)
above if appropriate.
3. Press the “eject” symbol on the right end of the spring-loaded handle and grab the other end
of the handle, pulling it until it is perpendicular to the face of the CEM+. The CEM+ will be gently
pushed out of the rack as you move the handle.
4. Pull the CEM+ straight out.
CAUTION:
Operating a dimmer rack with open
module slots disrupts airflow inside the
rack, which can lead to rack overheating
and subsequent rack shutdown.
Module safety stop
Safety stop
securing screws
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