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INSTALLATION INSTRUCTIONS
DESCRIPTION
WIRING DIRECTIONS
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Location: Device should be mounted in a location free of obstruction from
furniture, plants, walls and vibration (see Figure 1). The sensor must be
mounted a minimum of 4 ft. away from any air vents. Avoid mounting the
sensor close to heat source. When mounting directly to a ceiling light fixture,
the lens of the sensor must be below the lowest point of the fixture.
MDC-50L is designed for a ceiling height of about 8-10 feet. Because of the
umbrella shaped coverage pattern, mounting above or below the
recommended height could reduce coverage range and sensitivity. It is not
necessary to have occupancy sensor coverage on every square inch of space
in any particular room.
The best location to install multiple MDC-50L is usually in the walkways of an
open office space (see Figure 2).
Figure 1 Figure 2
Helpful hints:
a. Make sure that the sensor's view of the entrance will not be blocked by
the door when it is open.
b. Program a longer time out to avoid the lights constantly turning on/off.
c. Do not mount sensors close to air vents.
d. Cover the main walkways.
e. Try to avoid having the sensor looking out the door of the space
Open Office or Classroom Area Coverage:
a. To get complete coverage in an open office area, install multiple sensors
so that there is at least 15% overlap with each adjacent sensor's
coverage area.
b. The sensors should cover the primary occupant's desk, the entrance and
any other areas with heavy traffic.
WARNING
Turn the POWER OFF at the circuit breaker
before installing the sensor
Read and understand these instructions before installing. This device is
intended for installation in accordance with the National Electric Code and
local regulations. It is recommended that a qualified electrician performs this
installation. Make sure to turn off the circuit breaker or fuse(s) and make sure
power is off before wiring the device.
Use copper wire only.
The MDC-50L provides a 360° coverage pattern. The coverage shown
represents walking motion at a mounting height of 9 feet. For building spaces
with lower levels of activity or with obstacles and barriers, coverage size may
decrease.
The MDC-50L 360° Dual-Technology Occupancy Sensor combines advanced
passive infrared (PIR) and ultrasonic technologies into one unit. The combined
technologies help to avoid false triggering. Selectable operating modes allow
the sensor to turn a load on, and hold it on as long as either or both
technologies detect occupancy. After no movement is detected for the
selected time delay, the lights switch off.
The MDC-50L operates on 24V supplied by the MPP-24 Power Packs (Not
Included)
C0VERAGE
LIGHT LEVEL ADJUSTMENT
The sensor may be adjusted to operate at the desired level of ambient light.
To do so, turn the dial to point the arrow toward
the “-”sign for sensor to detect motion and
operate during low light or no light.
Point the arrow toward the “+”sign for
sensor to operate when there’s more light in the
area or even during daylight.
NOTE: The light level is adjustable only when
the time delay is set at or above 30 seconds.
MDC-50L
360° Dual-Technology PIR/Ultrasonic
Low Voltage Occupancy Sensor
SPECIFICATIONS
MDC-50L at 9' high
PIR Radius of 22'
(or 44' Diameter)
Adjustable Time Delay.............................................................. 5 Sec. to 30 Min.
PIR Coverage..............................................................................................1600ft
Ultrasonic Coverage....................................................................................1000ft
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Operating Temperature ....................................................32°to 131°F (0°to 55°C)
PIR Adjustment..........................................................50% or 100% (DIP switch 1)
Adjustable Light Level ................................................100 Lux -daylight(trimpot 2)
Ultrasonic Adjustment ......................................
Minimum to Maximum (trimpot 1)
Voltage ...................................................................................................... 24VDC
Current Consumption....................................................................................20mA
Power Supply.................................................MPP-24 Power Pack (Not Included)
SENSOR ADJUSTMENT
Light level Adjustment
Light
PIR
PIR activity
Ultrasonic
transducer cone
DIP Switches
Ultrasonic activity
LED(Green)
Ultrasonic
LED(Red)
sensitivity trimpot
Figure 4
Ultrasonic Radius of 18'
(or 36' Diameter)
Figure 3
White
Neutral
Hot
MPP-24
120VAC
277VAC
Black
Red
Black
Blue
Low Voltage Wires
Blue
(control output)
Black (Common)
Red (+24VDC input)
Red
Brown
Orange
Grey
Standard Wiring:
RED — +24VDC Input
BLACK — Common
BLUE — Control Output
Light
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