LiftMaster HCTDCU HCTDCU Installation Manual - Page 28

Miscellaneous Wiring, Three Button Control Station, Fire Department Open Input, Accessory Power 24 Vdc

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ACCESSORY WIRING MISCELLANEOUS WIRING THREE BUTTON CONTROL STATION (4 Terminals) • OPEN and COM: Opens a closed gate/door. Hard open (maintained switch overrides external safeties and resets alarm condition). If maintained, pauses Timer-to-Close at OPEN limit. Opens a closing gate/door and holds open an open gate/door (within line-of-sight). • CLOSE and COM: Closes an open gate/door. Hard close (maintained switch overrides external safeties and resets alarm condition within line-of-sight) • STOP and COM: Stops a moving gate/door. Hard stop (maintained switch overrides Open and Close commands and resets alarm condition). Cancels/resets Timer-to-Close at OPEN limit. Overrides Open and Close commands (within line-of-sight). FIRE DEPARTMENT OPEN INPUT (2 Terminals) Acts as hard open. Hard open (maintained switch overrides external safeties and resets alarm condition). If maintained, pauses Timer-to-Close at OPEN limit. Opens a closing gate/door and holds open an open gate/door (within lineof-sight). Bypasses any pre-warning delay. ACCESSORY POWER 24 VDC, MAX 500 MA (4 Terminals) • SWITCHED: Switched ON when the gate/door is in motion. Turns off after a 5 second delay when the gate/door stops. The power will remain ON at the open limit when Timer-to-Close is enabled and when the Timer-to-Close is counting down. • UNSWITCHED: 24 Vdc voltage out to power accessories, always ON. (Main control board) Three Button Control Station Open Close Stop N.C. Com Fire Dept Com Fire Department (Main control board) Accessory Power Switched Com (-) Acc Power +24 Vdc Com (-) Acc Power +24 Vdc Accessory Power Unswitched 28

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28
ACCESSORY WIRING
MISCELLANEOUS WIRING
THREE BUTTON CONTROL STATION
(4 Terminals)
•
OPEN and COM:
Opens a closed gate/door.
Hard open (maintained switch overrides external safeties and resets
alarm condition). If maintained, pauses Timer-to-Close at OPEN limit.
Opens a closing gate/door and holds open an open gate/door (within
line-of-sight).
•
CLOSE and COM:
Closes an open gate/door.
Hard close (maintained switch overrides external safeties and resets
alarm condition within line-of-sight)
•
STOP and COM:
Stops a moving gate/door.
Hard stop (maintained switch overrides Open and Close commands
and resets alarm condition). Cancels/resets Timer-to-Close at OPEN
limit. Overrides Open and Close commands (within line-of-sight).
FIRE DEPARTMENT OPEN INPUT
(2 Terminals)
Acts as hard open.
Hard open (maintained switch overrides external safeties and resets alarm
condition). If maintained, pauses Timer-to-Close at OPEN limit.
Opens a closing gate/door and holds open an open gate/door (within line-
of-sight). Bypasses any pre-warning delay.
ACCESSORY POWER 24 VDC, MAX 500 MA
(4 Terminals)
•
SWITCHED:
Switched ON when the gate/door is in motion. Turns off
after a 5 second delay when the gate/door stops. The power will
remain ON at the open limit when Timer-to-Close is enabled and when
the Timer-to-Close is counting down.
•
UNSWITCHED:
24 Vdc voltage out to power accessories, always ON.
Com
Open
(Main control board)
Three Button Control Station
Fire Department
Com
Fire Dept
Acc Power +24 Vdc
Com (-)
(Main control board)
Accessory Power Unswitched
Accessory Power Switched
Acc Power +24 Vdc
Com (-)
Close
Stop
N.C.