Mighty Mule Gate Opening Sensor (FM138)
The Gate Opening Sensor is designed for residential and agricultural applications and is compatible with Mighty Mule® automatic gate openers (see Sensor Box for model compatibility). The Sensor is an electromagnetic sensor, which offers 'hands free' operation of the Mighty Mule® Gate Opener with a 12 ft. radius of detection of vehicles in motion.
Make sure the power switch to the opener is turned OFF before connecting sensor wiring to the Mighty Mule 350 terminal blocks.
The wiring cable that comes with the Mighty Mule Gate Opening Sensor has four colored wires and a braded wire shield around them.
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| LOCK/BEACON | |||||
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| CHARGING |
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| POWER |
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LINK |
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| 18VAC |
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| EXIT | SAFETY | EDGE | CYCLE | COMMON |
| GRN | RECRBLK |
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| AUX |
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| SOLAR |
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| OUT |
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| COMMON |
RED to | BLUE |
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AUX OUT (+) | to EXIT | BLACK |
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YELLOW
Stripback a few inches of the vinyl (black) outter cover to expose the braided SHIELD. Cut the SHIELD down one side
and twist as shown in illustration. Connect the twisted SHIELD, the YELLOW, the BLACK as well as a separate length of wire, with a WIRE NUT. The other end of the single length of wire is connected to the COMMON terminal on the Mighty Mule 350 control board.
Connect the RED wire from the sensor to the AUX OUT (+) terminal, and the BLUE wire to the EXIT terminal on the Mighty Mule® 350 control board.
FINAL STEP
When everything has been connected to the opener...
replace the control board access cover. If you were working with the opener with the control board access facing up, remove the opener arm from both mounts and remount it in the upright position (control board cover facing down). Failure to remount opener in the up right position will allow water to enter the opener and cause damage to the opener control board.
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