INSTALLATION CONSIDERATIONS
(CONTINUED)
WIRING
From every IR Sensor location you must “home-run” a CAT-5 cable back to the MSU250.
Home run means that an individual cable is connected between each IR Sensor and the MSU250
(Figure 4).
6
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TECH TIP
W
IRE
SIZE
IS
EXPRESSED
BY
ITS
AWG (A
MERICAN
W
IRE
G
AUGE
)
NUMBER
–
THE
LOWER
THE
NUMBER
,
THE
LARGER
THE
AWG,
FOR
EXAMPLE
,
20 AWG
IS
PHYSICALLY
LARGER
THAN
22 AWG.
Remotely Located
IR Sensors
Figure 4:
Home run the sensor cable
from the sensor to the MSU250
Sensors In
NOTE: IMPORTANT – AVOIDING INTERFERENCE AVOID LOCATING ANY OF THE CABLES, SENSORS,
KEYPADS OR THE MAIN SYSTEM UNIT NEAR ANY POTENTIAL SOURCES OF ELECTRO-MAGNETIC
INTERFERENCE (EMI), SUCH AS LIGHT DIMMERS, SPEED CONTROLS FOR CEILING FANS,
ELECTRICAL BALLASTS, TELEVISION SETS, LARGE MOTORS, HEATERS OR AIR CONDITIONERS
