LockMaster LM138 User Manual - page 2
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UNIVERSAL EXTERNAL RECEIVER WIRE
CONNECTION INSTRUCTION MANUAL
1. Connect the external receiver to the door opener if it is with Aux. 12—24VDC
output.
e.g. Connect the external receiver to CRAFTSMAN garage door opener.
(a). Connect the black wire into “NEC” terminal.
(b). Connect the brown wire into “CL2” terminal.
(c). Connect the red wire into “24V” terminal.