User Guide

1A4747 Auxiliary Contacts Option Board
Commercial door operator accessory for use only with Liftmaster solid state
commercial door operators.
The Auxiliary Contacts Option Board has both
normally-open and normally-closed contacts that
actuate when the door is opening, closing and when
the unit is powered down.
When the CDO is powered up, the following contacts
outputs are available:
While opening: open 2 - 1 opened
(Open Aux. Contact)
open 2 - 3 closed
While Closing: close 2 - 1 closed
(Closed Aux. Contact)
close 2 - 3 opened
CDO powered down: open 2 - 1 opened
open 2 - 3 closed
close 2 - 1 closed
close 2 - 3 opened
CDO powered on open 2 - 1 closed
& door not in motion: open 2 - 3 opened
close 2 - 1 opened
close 2 - 3 closed
NOTE: Power for devices controlled by the auxiliary
contacts to be supplied from an external source.
INSTALLATION: Connect wires to terminals as
needed. Use copper wire only #14 AWG maximum.
Plug option board into the slot on the end of the
motherboard. Reconnect power to operator. The green
light(s) on the option board will turn on if the board is
seated properly and the power is on.
© 1994, The Chamberlain Group, Inc.
114A1809C All Rights Reserved Printed in Mexico
Auxiliary Contacts
Option Board
Terminals
Green Lights
Insert PCB
Board into end
slot ONLY
CDO
Motherboard
Q2
R4
R3
R2
Q1
R9
R1
R10
C1
C2
D1
J1
10
K1
1OPEN -CLOSE- 2 312 3
K2
D2
R7
C6
R8
TB1-
R5
TB2-
C5
D3
R6
C4
C3
D4
14LG419B
AUX CONTACTS
K2
K1
+24V +5V
Green Lights 1C4653
Terminals
Auxiliary Contacts Option Board
TO AVOID SERIOUS PERSONAL INJURY OR
DEATH FROM ELECTROCUTION, DISCONNECT
ELECTRICAL POWER TO OPERATOR BEFORE
PROCEEDING.
WARNING
TO AVOID DAMAGE TO RELAYS, DO NOT
EXCEED MAXIMUM CONTACT RATING OF
10A @ 240VAC. NOT APPLICABLE FOR
INCANDESCENT LOADS.
CAUTION
CONDUIT, WIRING, AND CONNECTORS
SHOULD BE SIZED AND INSTALLED PER THE
NATIONAL ELECTRICAL CODE.
CAUTION
CONTROL
WIRING
Limit
Assembly
POWER
WIRING
®
Route wiring as shown below.