All-O-Matic SL-175 DC Manuals & Support

The All-O-Matic SL-175 DC is a 36 VDC brushless slide gate operator for heavy commercial and industrial gates up to 100 ft. It is rated 8,000 lb at 12 in per second or 3,000 lb at 24 in per second.

It has a super-duty frame, a 30:1 gearbox with internal clutch, a foot pedal release and a loop detector rack. Three 14 Ah batteries are built in, and it is solar ready.

Identify your model

The model and serial number are on the label inside the control box. DC PRO units have the ALL-BLDC PRO board with an LCD display. Earlier DC units have an LED-only board; use the earlier board manual below for those.

The SL-175 is ordered at 12 in or 24 in per second. Check the speed on the label before you order a gearbox or motor.

Key specs

Max gate	8,000 lb at 12 in/s; 3,000 lb at 24 in/s; 100 ft
Motor	36 VDC brushless
Duty cycle	Continuous
Power	115 or 230 VAC single phase, or 36 VDC solar
Gearbox	30:1 with internal clutch
Battery backup	Three 12 V, 14 Ah
Release	Mechanical foot pedal
Current draw	9 A at 115 VAC
Warranty	5 years commercial

Manuals and documents

Troubleshooting

The ALL-BLDC PRO control board has an LCD and input LEDs. Note which LEDs are on before you change any settings.

Gate does not run and the ALARM LED is on

The gate hit an obstruction twice before it reached full close, and the operator shut down.
Press the red RESET button next to the radio connector, then check that the gate is not bound up or jammed.
Retest the ERD (obstruction) sensitivity after you clear the cause.

Gate does not run

STOP LED on: the STOP input is open. It is a normally closed input, so check the device or the jumper.
FP_DISABLE LED on: the foot pedal release is down. Lift it to clear the kill switch.
MON_FAULT LED on: a monitored photo eye or edge is missing or faulty. The gate then runs only on constant pressure.

Opening or closing LED is on but the gate does not move

If the AC PWR LED blinks, replace the fuse at the bottom right of the board.
Check that the gate moves freely and the limits are set correctly.
Check that the motor harness is plugged in tight with no loose wires.

MODE LED blinks

1 blink every 2 seconds: motor sensor feedback problem. Check the motor harness.
2 blinks: motor overload.
3 blinks: the gate is jammed.

No power or slow gate

AC PWR_ON LED off: check main power, the AC power switch and the 10 A fuse on the EMI board. If the fuse blows again, check the bridge rectifier.
Gate runs slow: set the variable speed to 100%, then relearn the soft stop. Put the gate on the closed limit, press and release RESET, and run one full cycle without stopping.

Common questions

UL 325 (2018) boards need monitored entrapment devices for the open and close directions. If a device is missing or faulty, the MON_FAULT LED lights and the gate runs only on constant pressure. Wire monitored photo eyes or edges, then press RESET.

Press down the foot pedal release on the operator. The pedal also cuts power to the motor, so lift it before you run the gate again.

The operator shuts down after two obstructions before full close. Clear the obstruction, then press the RESET button next to the radio connector.

It uses three 12 V, 14 Ah batteries for its 36 VDC system. Replace all three together.