Mighty Mule FM502 Green Board - Manual (Page 34)

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Refer to the sensor manufacturer’s instructions for information
about installing these devices on a vehicular gate.
Make sure the power to the opener is turned
off before connecting safety device wiring to the
terminal blocks. Unplugging the transformer does
not turn power to the opener OFF.
Non-Contact Sensor Connection:
Connect one of the non-contact sensor dry contact output wires to
the COMMON (COM) terminal and the other to the SAFETY
terminal on the Mighty Mule® 502 control board.
This input is ONLY monitored when the gate
is closing. Activating the non-contact sensor
(obstructing the safety beam path) will cause the
gate to reverse to the fully open position.
Non-Contact Sensors (photo beams)
The Mighty Mule® 502 can also accept "Safety" input from normally open "dry-contact" output devices such as safety beams
connected to the SAFETY input terminal.
If not installing a non-contact sensor skip to next section.
PLEASE NOTE: Non-contact sensors are not included with Non-contact sensors are not Non-contact sensors are not the Mighty Mule® 502.
Wire from Non-Contact
Sensor (photo beam)
RECEIVER
COM COM
CY
CLE
CL
OSE
SAFETY EXIT/ OPEN SHADOW LOOP CL
OSE
EDGE OPEN EDGE
BLK GRN RED
STALL FORCE
MI
N
MA
X
Shadow Loop
If not installing a shadow loop skip to next section.
Wire from Shadow Loop
RECEIVER
COM COM
CY
CLE
CL
OSE
SAFETY EXIT/ OPEN SHADOW LOOP CL
OSE
EDGE OPEN EDGE
BLK GRN RED
STALL FORCE
MI
N
MA
X
Refer to the sensor manufacturer’s instructions for information
about installing these devices on a vehicular gate.
Make sure the power to the opener is turned
off before connecting safety device wiring to the
terminal blocks. Unplugging the transformer does
not turn power to the opener OFF.
Shadow Loop Connection:
Connect one of the shadow loop wires to the COMMON (COM)
terminal and the other to the SHADOW LOOP terminal on the
Mighty Mule® 502 control board.
The SHADOW LOOP is a detector located with the moving path
of the gate to prevent the gate from closing when a vehicle is in
the path.
PLEASE NOTE: Non-contact sensors are not included with Non-contact sensors are not Non-contact sensors are not the Mighty Mule® 502. the Mighty Mule® 502.