Sensor Wiring - LiftMaster LMTBUL Guia De Inicio Rapido

Wiring
Sensor wiring (red and black wires): Wire the photoelectric sensors (red [+] and black [-] wires) to the
appropriate inputs on the operator or expansion board as shown.
Heater wiring (green and white wires):
• OPTION 1 - Connect to the ACCESSORY POWER ON terminal on the control board (NOT polarity specifi c).
• OPTION 2 - Connect to an external 12V to 24V DC or AC power supply (not provided) with adequate current
to power all sensors.
• OPTION 3 - For use with battery backup. Connect to ACCESSORY POWER ON and AUX RELAY terminals.
Set AUX RELAY switches as shown. In this confi guration, the heater will switch off during a power failure to
extend the battery life.
DO NOT overload the accessory power output on the control board or the external power supply.
NOTE: Heater feature is not recommended for ANY solar installations.

Sensor Wiring

Control Board
CLOSE EYES/INTERRUPT
for close direction
OR
OPEN EYES/EDGE for open
direction
Heater Wiring
OPTION 1
OPTION 2
OPTION 3
For use with battery backup
Control board
ACCESSORY
POWER ON
Max. draw 500 mA
Black (-)
Red (+)
See below
Control board
ACCESSORY POWER ON
Max. draw 500 mA
External 12V to 24V DC or AC power
supply (not provided) with adequate
current to power all sensors
From Sensors
Black (not provided)
Expansion Board
OR
Set switch for open
or close direction
OR
OR
Expansion board
aux relay
Red (+) to EYE
or EYE/EDGE
Black (-)
to COM
See below
From Sensors
Green
White
From Sensors
Green
White
AUX RELAY will switch
off during power failure