On/Off Photocell- Fixture Mounted
The CMRB PC Series of On/Off Photocell sensors provide the industry's most intelligent control of lighting for daylight harvesting applications. The sensors work by monitoring daylight conditions in a room, then controlling the lighting so as to insure that adequate lighting levels are maintained. The CMRB PC has On/Off lighting control; turning off the lights when sufficient daylight is present and turning them on when additional lighting is necessary. The CMRB PC Series sensors are line powered and can switch loads directly without the need for a Power Pack.

The CMRB PC enclosure is specifically designed to mount on the end of a linear fluorescent fixture.
 

Typical Applications

Public spaces with windows such as-

Corridors, bathrooms or vestibules

 

Features

Full On/Off Switching of Lighting

Self-Contained Relay - No Power Pack needed

No Minimum Load Requirements

Self-calibrating Set-Point

Digital Set-Point Control

Push-Button Programmable

Green LED Indicator

100 Hr. Lamp Burn-in Timer Mode

  The lights turn "On" when the spaces overall light level drops below a programmable threshold called a set-point. The lights turn "Off" when light is above the set-point plus a 10 to 20% safety factor and deadband. The safety factor will prevent the system from cycling when the light level is very near the set-point. The deadband is the level of light contributed by the artificial lights being controlled. This level is tracked so if the lighting conditions change (for example a lamp burns out) the point at which the lights turn off is adapted accordingly. If the photocell is looking up at skylights and can not view the lights being controlled, there is no deadband and the sensor is said to be working open loop. There is also an adaptive 5-25 minute delay before the photocell turns the lights off to prevent the system from cycling on a cloudy day.

 

Specifications

Physical Specs

Size: Size: 3 5/8" x 3 5/8" x 1 1/2" Deep (9.2 cm x 9.2 cm x 3.8 cm Deep)

Color: White

Mounting: 1/2" knockout in fixture or junction box

Environmental Specs

Relative Humidity: 20 to 90% non-condensing

Operating Temp: 14º to 160º F (-10° to 71° C)

Storage Temp: -14º to 160º F (-26° to 71° C)

Electrical Specs

Load Rating (1 Phase Only): 800 W @ 120 VAC, 1200 W @ 277 VAC,  1500 W @ 347 VAC

Motor Load: 1/4 HP

Frequency: 50/60 Hz (Timers are 1.2 times for 50 Hz)

UL, CUL and California Title 24 Compliant

5 Year Warranty

Made in U.S.A.

CMRB-PC Data Sheet (pdf file)

CMRB--PC Wiring Diagram (pdf file)

CMRB-PC Mounting Diagram (pdf file)