Chamberlain LIFTMASTER MUGAPLM - Manual (Page 2)

2
Gate Control Unit (GCU)
(not provided)
Assemble
Step 1: Remove GCU cover.
Step 2: Install 4 AA Alkaline
batteries (not provided).
(Lithium batteries
recommended for colder
environments.)
NOTE: This step applies only if more than one GCU
is being used.
Step 3: Up to four GCUs can be used. Each GCU will
need a different Identity. Set the Identity of the GCU
by changing the Dipswitches as shown in the chart
below.
GCU ID Switch #1 Switch #2
1 OFF OFF
2 ON OFF
3 OFF ON
4 ON ON
Dipswitches
Learn
Button
Program
Press the Learn button on the
GCU for one second. The LED
will light for 20 seconds.
LED
? ? ? ?
Within 20 seconds enter Master PIN Number on
MUGAPLM:
Followed by GCU Identity as determined in Step 3:
1 2 3 4 OR OR OR
The GCU LED will blink 3 times indicating
programming is successful. NOTE: The relay will
engage. If error tone is heard or GCU LED emits 3
double blinks, then programming has failed.
Repeat for additional GCUs.
Installation
Step 1: Replace GCU cover
and mount near gate operator
control box.
Step 2: Remove bottom panel
of GCU. Connect Terminal 10
on GCU to Common on gate
operator (shown below).
Connect Terminal 9 to Cycle on
gate operator (shown below).
“BEEP” “BEEP”
NOTE: If there is already an existing receiver proceed
to Pre-Installed LiftMaster Receiver
(315Mhz Only) section.
1 3 2 4 5 6 7 8 9 10 11
DC
AC
+ -
COM
N/C
EXIT
SAFETY
EDGE
COMMON
OPEN
N/O GATE OPERATOR
GCU