Controls And Accessory Installation - Chamberlain LiftMaster Professional SW420 Installation And Maintenance Instructions Manual

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Controls and Accessory Installation

Controls and Accessory Installation
See wiring diagram for more information. See Wiring Specifications on p. 9 for wiring
distances and wire gauge information.
All inputs are normally open and momentary, except the stop (NC), and emergency close and
emergency open (constant pressure). The following instructions are based upon UL 325, dated March
of 1999 and include recommendations for significant increase in safety.
We strongly recommend that you follow the UL guidelines presented throughout the manual.
Installation device instructions – always follow the instructions provided by the manufacturer when
installing and adjusting any control device. If these instructions are contrary to the advice given here,
call for assistance.
WARNING
All controls that are to be used to operate the gate system must be installed where the user
cannot touch the gate while operating the controls. Also, always install the controls where the
user has full view of gate operation.
5
OPEN BUTTON
Caution - Only wired devices in sight of the
gate may be used with this input.
5
SAFETY OPEN
Will reverse (close) the gate if active. If struck
again during a reversal the gate will stop.
5
SECURITY LOOP
This input is for vehicles only and does not
provide UL secondary safety for persons. This
functions as an wireless open unless on the
close limit where it is defeated - thus preventing
vehicles from entering.
1 2 3
RADIO
RECEIVER
NOTE: Numbers shown inside a box are on the J1 terminal strip on the circuit board.
Connections shown here are field connections. The radio receiver may be ordered factory
installed.
Doc 01-G0610
Rev A
7
WIRELESS OPEN BUTTON
Any device can be used here and the radio
(R2) Is wired here internally by the factory.
Note, on a second inherent obstruction, this
SECONDARY SAFETY
OPEN
It is recommended that secondary
9
safeties always be used for both
8
These are constant pressure inputs that
bypasses the processor and may be used in
an emergency even if the processor fails.
R1
R2
R3
TERMINAL STRIP
ON SIDE OF
CONTROL PANEL
5 6
input will not function (disabled).
the open and close directions.
Use safety edges. In any case,
the device must sense people.
Loops cannot be used.
E- OPEN
1
3
E- CLOSE
2
Note left/right switch effects direction.
12
11
11 12
MASTER/SLAVE
Use shielded twisted pair.
do not run with power wiring.
Figure 17
5
CLOSE/SINGLE BUTTON
CLOSE
5
SAFETY CLOSE
Will reverse (open) the gate if active. If stuck
again during a reversal the gate will stop.
May defeat the timer to close.
3
STOP BUTTON
- REQUIRED -
This is a normally closed input and the operator
will not run unless this is installed!
13
POWER GATE LOCK
USE POWER TO MATCH GATE LOCK
REQUIREMENTS, NOT TO EXCEED
115V 10A.
For warning devices,
call the factory
01-G0610F16
4
10
5
14