Mighty Mule FM121 - Manual (Page 3)

Rev. 09/29/10
3
For optimal efficiency, wipe the face of the panel frequently with a soft, damp cloth.
The output of the Solar Panel is variable during the day depending on the intensity
of the sun and the angle of the rays striking the panel. The output may vary from a
few millivolts to as much as 22 volts. To check the output, simply disconnect the
solar panel leads from the control board and connect them directly to a dc voltmeter.
In bright sunlight the panel output should read at least 18 volts dc at approximately
300mA.
STEP 3:
Make sure control box is OFF. Feed the free end of the solar panel wires into the control box
and attach them to the appropriate terminals on the control board. The RED solar panel wire goes to the (+)
POSITIVE Solar terminal and the BLACK solar panel wire goes to the (–) NEGATIVE Solar terminal. Improper
installation of these wires will damage the opener's control board.
Below are examples of solar terminals on various Mighty Mule and GTO/ACCESS SYSTEMS control boards.
If you do not see an illustration of your control board below, please refer to your gate opener Installation
Manual for instructions on wiring the control board. Or you may call GTO's Technical Service Department at
(800)543-1236 or (850)575-4144 for assistance.
NEVER USE THE SOLAR PANEL AND THE AC TRANSFORMER AT THE SAME TIME! It will
damage the control board.
18 VAC SOLAR RELAY OUT
~ ~ - +
NC NO RLY-COM
J9 J2 J1
SOLAR
INPUT
18VAC/
AUX
OUT
H L
AUX
OUT SOLAR
PANEL
18VAC
BLK
Solar Panel Wires
RED
WHT GRN
SECOND OPR.
RED BLK
14 V
AC
OR
SOLAR
RED BLK
Solar Panel Wires
POWER
CHGR CHGR EDGE CY
CLE EXIT
SAFETY
COM COM
LOCK+ LOCK -
VAR3 VAR1 VAR4 VAR5 VAR6
RED BLK
Solar Panel Wires
18VAC SOLAR
+ – ~ ~
RED BLK
Solar Panel Wires
POWER IN
18VAC SOLAR
~ ~ – +
RED BLK
Solar Panel Wires
Solar Panel Wires Solar Panel Wires Solar Panel Wires
~
SOLAR
or
18 VAC
LOCK
GTO AUX
GTO
TRANSF LOCK
PWR
AUX
RLY
Solar Panel Wires
POWER
INPUTS
LOCK
PWR
AUX
RLY
CONTROL OUTPUTS
GTO 18VOLT
TRANSFORMER
OR SOLAR