Mighty Mule R4222 - Manual (Page 4)

4
• Wire with 16awg minimum (RB509)
• 300 ft (91.4m) max length
• Be sure to capture the wire ends under
the wire clamp plates.
• Avoid frayed ends on wires that might
produce a short circuit.
• Be careful not to overtighten the screws
as this may strip the threads in the plastic
The diagrams below represent the terminal strips on the receiver and transmitter and can be used for
reference for connections.
Connecting Photo Beams to GTO Access Systems
and Mighty Mule Control Boards
Terminal Strip Identification
Wiring Precautions
Make sure the power switch 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.
IMPORTANT: DO NOT use Photo Beams on systems charged with solar panels.
Wiring Terminals
RECEIVER
1 2 3 4 5 6 7
POWER
ALARM
TAMPER
+ –
Wiring Terminals
TRANSMITTER
1 2 6 7
POWER TAMPER
+ –
Correct Wrong Wrong
Wire
Terminal
Block
Terminal
Block
Terminal
Block Wire Wire