Mighty Mule FM502 Dual Swing - Blue Board - Manual (Page 33)

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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 the Mighty Mule® 502.
Wire from Non-Contact
Sensor (photo beam/loop detectors)
RECEIVER
ALM
GTO RCVR.
BLK
CO
M
GRN BLK RE
D
CY
CLE
SAFE
TY
EXI
T
SHADOW
OPEN EDGE CO
M
CONTROL INPUTS
CL
OS
E
EDGE
Shadow Loop
If not installing a shadow loop skip to next section.
Wire from Loop Detector
RECEIVER
ALM
GTO RCVR.
BLK
CO
M
GRN BLK RE
D
CY
CLE
SAFE
TY
EXI
T
SHADOW
OPEN EDGE CO
M
CONTROL INPUTS
CL
OS
E
EDGE
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 the COM wire from the Loop Detector to the COMMON
(COM) terminal and the Normally open Wire from the Loop
Detector to the SHADOW 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 the Mighty Mule® 502.
The Mighty Mule® 502 can accept "Shadow Loop" input
from Loop Detector that provides normally open "dry-contact"
connected to "Shadow" input terminal.
This input is ONLY monitored when the gate is at
the fully open position. Activating this will prevent
the gate from closing.