MEDIUM DUTY LOGIC
EXTERNAL ANTENNA KIT
MODEL EXT-ANT
APPLICATION
This device is for use ONLY on LiftMaster Commercial Door
Operators. Use on other than recommended equipment voids
warranty, and may cause PROPERTY DAMAGE or SERIOUS
PERSONAL INJURY.
INSTALLATION
1. Disconnect power from the operator.
2. Remove electrical box cover.
3. Connect coaxial cable to “AUX ANT” on logic board.
4. Remove the nut and washer from the coaxial cable and route
the cable through side wall of electrical box.
5. Secure the cable by re-installing the washer and nut.
6. Connect antenna to coaxial connector on the outside of the
electrical box.
7. Cut the purple antenna wire from the logic board.
8. Replace cover.
9. Reconnect power. Test the system.
To reduce the risk of SERIOUS INJURY or DEATH:
• Disconnect electric power at the fuse box BEFORE
proceeding.
• ALL electrical connections MUST be made by a trained door
systems technician.
• Upon completion of kit installation, the area MUST be
cleared and secured. At that time the unit may be returned
to service.
AUX ANT
(External Antenna connection)
External Antenna
(On outside of electrical box)
Coaxial Cable
BNC Connector
(Inside electrical box)
OPTIONAL
RECOMMENDED
Nut and Washer
WARNING:
This product can expose you to chemicals
including lead, which are known to the State of California to
cause cancer or birth defects or other reproductive harm.
For more information go to
www.P65Warnings.ca.gov
