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While it is strongly recommended that the Master/Slave function be used in any dual-unit installation, two
LiftMaster model BG 3100-X1's may be parallel-wired as Bi-Parting gates only.
1.
When parallel wiring the RADIO INPUT terminals, do not connect the POWER output from one
board to the POWER output on the other board.
Failure to observe this will damage both controller board.
2.
Do not parallel wire the MAGLOCK terminals. Auxiliary device circuits may be damaged if
separate auxiliary devices are used with each board.
3.
Both gate operators must have the same settings for:
a. Gate Control Settings (See Part 2, Section J, Basic Gate Operator Programming)
b. Current Sensitivity pots (Left & Right Reverse, Inrush)
c. Limit Cams
The Signal and Common terminals on the one board MUST connect to the corresponding Signal and
Common terminals on the other board. Failure to observe this will damage both Controller boards.
Rev B
APPENDIX B
PARALLEL GATE WIRING
Figure B-1. Parallel Bi-Parting Gate Installation.
DO NOT INTERCHANGE SIGNAL AND COMMON TERMINALS.
Doc 6001343 (01-20299)
NOTES
CAUTION
35 of 40
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