nCM-PC
ON/OFF PHOTOCELL
CEILING MOUNT• LOW VOLTAGE
SPECIFICATIONS
Features
Full On/Off Switching Control
Communicates w/ nLight Network
Remotely Configurable/Upgradeable
Self-Calibrating Set-Point
Push-Button Programmable
100 Hr Lamp Burn-in Timer
Green LED Indicator
physical specs
SIZE Circular 4.55” Dia. (11.56 cm)
1.55” Deep (3.94 cm)
WEIGHT 6 oz
MOUNTING
Ceiling Tile Surface
Round Fixture Box
Single Gang Handy Box
COLOR White
NETWORK CONNECTION
2 RJ-45 Ports
electrical specs
POWER CONSUMPTION < 2 mA
WIRES None
environmental specs
OPERATING TEMP
14º to 160º F (-10º to 71º C)
STORAGE TEMP
-14º to 160º F (-26º to 71º C)
RELATIVE HUMIDITY
20 to 90% non-condensing
Other
UL and CUL Listed
Title 24 Compliant
5 Year Warranty
Made in the U.S.A.
The nCM-PC Series On/Off Photocell
sensor provides the industry’s most
intelligent control of lighting for daylight
harvesting applications. Ideal for public
spaces with windows like vestibules,
corridors, or bathrooms; the sensor
works by monitoring daylight conditions in
a room, then controlling the lighting so as
to insure that an adequate lighting level is
maintained. The nCM-PC is used for on/
off lighting control; turning off the lights
when sufficient natural light is present and
turning them on when additional lighting
is necessary. The nCM-PC sensor can
be used alone or together with occupancy
sensors. To add dimming control to the
on/off switching provided by the nCM-PC,
see the nCM-PC-ADC sensor.
SENSOR OPERATION
OPTIONS
Dual zone (-DZ)
• Provides second output that can
control an additional zone of lighting
stepped dimming (duo)
• Ideal for A/B switching applications
• Determines the necessary on/off
combination of the two poles in
order to maintain adequate lighting
percentage offset
operation
• Ideal for classrooms with individually
controlled parallel rows of lights
• On/OffOperation: Full control during
periods of occupancy with adequate
daylight
• Second zones uses a relative setpoint that is a percentage of the first
zones’s set-point
LOW TEMP/HIGH HUMIDITY (-LT)
When the space’s overall light level drops • Sensor is corrosion resistant to
below a programmable threshold called
moisture
a set-point, the sensor signals a relay • Operates down to -40º F/C
located elsewhere within the sensor’s
zone to switch the line voltage lighting load on. 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 cloud
delay (optional) before the photocell
turns the lights off to prevent the system
AMPLE DAYLIGHT
from cycling on a cloudy day.
nLIGHT OPERATION
DEADBAND
Set-point
NO DAYLIGHT
Lights Turn ON
Lights Turn OFF
This sensor is nLight-enabled, meaning
it has the ability to communicate over
an nLight network. When daisy-chain
wired, using CAT-5 cabling, with other
nLight-enabled sensors, power packs,
or WallPods, an nLight control zone
is created. Once linked to a Gateway,
directly or via a Bridge, the zone becomes
capable of remote status monitoring and
control via SensorView software.
ORDERING INFO
nCM-PC-[DUAL ZONE]-[TEMP/HUMIDITY]
OPTIONS
TEMP/Humidity
Blank = None
-DZ = Dual Zone
Blank = Standard
-LT = Low Temp
Dual zone
Revised 07.07.08 © 2008 Sensor Switch, Inc.
WIRING (DO NOT WIRE HOT)
Note: Sensor power is provided via the CAT-5 connection.
BLK - 120 V
ORN - 277 V
nPP-16
CAT-5
LOAD
CAT-5
DEVICE SETTINGS
Several operational settings for the nCM-PC are available:
• Automatic set-point calibration mode
• Photocell broadcast channel (1-16)
• 100 hr burn-in timer mode (enable/disable)
• Photocell Mode Selection:
• Blink back set-point (in footcandles)
• 10’s digit of set-point (0-200 fc)
Stepped Dimming
Stepped Dimming w/ one pole always left on
Dual Zone Mode - Percentage offset between zones
Fan Mode - Zone 2’s photocell control is disabled
• One’s digit of set-point (0-9 fc)
• Dual zone set-point offpoint % (110-200%)
• Sunlight discount factor (1-8)
• Photocell transistion off timer (45 sec to 25 min)
• Photocell broadcasting (enable/disable)
• Photocell transistion on timer (45 sec to 25 min)
INSTALLATION
• Mount sensor directly to a ceiling tile or a metallic grid (two
self-tapping screws provided)
• Sensor’s mounting holes also align with standard round
fixture or single gang handy box (screws not provided)
• Interconnect unit (via RJ-45 ports) with other nLight devices
in lighting zone using CAT-5 cables
• Once power is received via CAT-5 connection, all devices in
zone will automatically begin functioning together according
to each device’s defaults
PUSH-BUTTON
RJ-45 PORTS
PROGRAMMING
Refer to included instruction card for default settings and directions on programming the sensor via the push-button.
®
WARRANTY: Sensor Switch, Inc. warrants these products to be free of defects in manufacture and workmanship for a
period of 60 months. Sensor Switch, Inc., upon prompt notice of such defect, will, at its option, provide a Returned Material
Authorization number and repair or replace returned product.
Limitations and Exclusions: This Warranty is in full lieu of all other representation and expressed and implied
warranties (including the implied warranties of merchantability and fitness for use) and under no circumstances shall
Sensor Switch, Inc. be liable for any incidental or consequential property damages or losses.
TN-111-01
900 Northrop Road, Wallingford, CT 06492 • 1.800.PASSIVE • FX 203.269.9621 • www.sensorswitch.com