Owner's Manual

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Cable Tension Roller
1. Position cable tension monitor above the door and close to the drum.
2. Make sure there are no obstructions that prevent cable tension monitor from closing completely when
slack is detected.
3. Roller must be mounted 2” to 6” (5-15 cm) from the bottom of the drum.
4. Cable tension monitor roller must be placed 1/8” to 1/4” (3 to 6 mm) away from the cable.
5. Mark and drill 3/16” pilot holes for screws. Fasten cable tension monitor with 1/4 -10 x 50 mm (2) lag screw
(provided).
Installing Cable Tension Monitor
Drum
Cable Tension Monitor
A second cable tension monitor (GU-CTM) can be installed on the other side of the door. Unplug opener. Follow
the above instructions. 26.2´ (8m) of wire is supplied with the GU-CTM. Cut the wire to the desired length. Strip and
twist wires from each monitor (white/white, black/black) to form a twisted pair and insert into the CABLE MONITOR
terminals.
1/8”-1/4” (3-6 mm)
Note: Cable Tension Monitor is shipped for right side installation. If installed on the left side, remove the e-ring at
the end of the roller, remove the roller and reassemble on the opposite side.
CABLE
MONITOR
2” - 6”
(5 - 15 cm)
Wall
Cable
Approx. 3/4”
(19 mm)
Screw
1/4 -10 x 50 mm (2)
Cable Tension Roller