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5
CONTROL DESCRIPTION AND FEATURES
The ABL-3911C and ABL-3921C Brushless DC Motor Controls are chassis style
controls, designed to be mounted into a separate control enclosure supplied
by the user . They operate from a nominal 115 VAC, 50/60 Hz . power source
and provide electronic commutation and phase current switching needed
to operate brushless DC motors . DIP switch selectable current limit settings
allow the controls to be used with several fractional horsepower motors and
gearmotors . The controls are factory pre-set for 60° commutation .
The ABL-3911C and ABL-3921C provide a 130 Volt filtered output for improved
form factor, plus a built-in dynamic braking module . They allow motor speed
to be manually or electronically controlled .
Motor direction of rotation, braking or disabling, and soft starts and stops can
be controlled with manual switch inputs or by logic control . Since the control’s
signal common is not at ground potential, interface circuitry is required to
isolate logic signals from the control . Trim potentiometers on the control board
allow additional fine tuning of minimum and maximum speed settings, torque,
acceleration and deceleration time . A built-in “Smart Reverse
TM
” circuit
prevents plug reversing by braking the motor to a stop before changing its
direction . A built-in shutdown circuit disables the control during overvoltage,
under-voltage, or invalid commutation sensor state conditions .
Specific Bodine motor sizes which can be used with this control are listed in
the Chart in Figure 6 .
Accessory Items
• Model 3983 Connection Cable Assembly — connects standard Bodine
brushless DC motors and gearmotors to ABL-3911C and ABL-3921C
controls . Length: 6 foot . (see page 10) .
• Model 3982 Extension Cable — extends cable between motor and
control by six feet . Both ends equipped with circular connectors for easy
connection between Model 3983 Cable and motor . Length: 6 ft .
• Model 3984 Isolated Interface Module (See page 16 .)