B&B ARMR 400 Series Installation And Operation Manual page 8

Installation and Operations Manual — Model 400 Series
TROUBLESHOOTING 10
on a concrete pad close to the motor stanchion. Conduits connecting the unit and motor
stanchion carry the hydraulic lines and electrical control cables.
The unit also houses the gate control circuitry, the main components of which are the PLC
(programmable logic controller) that is programmed with the gate's operating logic, the
motor starter, and the motor overload protector. The control circuit is 120-volt, single-phase
with 24-volt dc input. The outputs are 24-volt dc and 120-volt ac and some are customer
defined for dry contacts. The unit has a built-in 120-volt convenience outlet (the customer
supplies power and wiring to the box), and a master switch turns off all the power to the unit
for maintenance and repairs. A disconnect is required for the 208-volt coming into the unit,
and should be located close by.
The key components of the motor stanchion are shown in Figure 1-2.
Figure 1-2: Model 400 Series Motor Stanchion
Roller Wheel
Limit Switch
Mount
it
Condu
B&B ARMR
A Division of B&B Roadway and Security Solutions 04X0 Rev G