LiftMaster LA412UL Installation Manual - Page 35

Maglock, Miscellaneous wiring, LOCK 2 Terminals, N.C. and COM, Single button control SBC 2 Terminals

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ACCESSORY WIRING Maglock LOCK (2 Terminals, N.C. and COM) Relay contact output, Normally - closed (N.C.) output for maglocks. Relay activates prior to motor activation and during motor run. Relay is off when motor is off. Miscellaneous wiring Single button control (SBC) (2 Terminals) Gate command sequence - Open, Stop, Close, Stop,... Soft open (maintained switch does not override external safeties and does not reset alarm condition). Fire department open input (2 Terminals) Acts as hard open. Maintained input overrides (ignores) external safeties (photoelectric sensor and edge), pauses Timer-to-Close momentary input logic as single button control and safeties remain active, re-enables Timer-toClose. Accessory power 24 VDC, MAX 500 mA (4 Terminals) l SWITCHED: Switched ON with gate motion and at the open limit when Timer-to-Close is active. Turns off 5 seconds after motion. l UNSWITCHED: 24 Vdc voltage out to power accessories, always ON. 35

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35
Maglock
LOCK (2 Terminals, N.C. and COM)
Relay contact output, Normally - closed (N.C.) output for maglocks.
Relay activates prior to motor activation and during motor run. Relay is
off when motor is off.
Miscellaneous wiring
Single button control (SBC) (2 Terminals)
Gate command sequence - Open, Stop, Close, Stop,...
Soft open (maintained switch does not override external safeties and
does not reset alarm condition).
Fire department open input (2 Terminals)
Acts as hard open.
Maintained input overrides (ignores) external safeties (photoelectric
sensor and edge), pauses Timer-to-Close momentary input logic as
single button control and safeties remain active, re-enables Timer-to-
Close.
Accessory power 24 VDC, MAX 500 mA (4
Terminals)
l
SWITCHED: Switched ON with gate motion and at the open limit
when Timer-to-Close is active. Turns off 5 seconds after motion.
l
UNSWITCHED: 24 Vdc voltage out to power accessories, always ON.
ACCESSORY WIRING