ABC Series
Electronic Motor Brake
The ABC Series "automatic braking controller" features full-wave DC braking which can be adjusted to stop your load quickly, repeatably and reliably — even if load conditions change. Maximized Safety, Increased Productivity and Maintenance-Free Operation.
| AC Supply Voltage | 190 – 600 Vac, 50/60 Hz |
| HP Ratings | 1 to 800 HP |
| Amp Ratings | 7 to 1,000 Amps |
| Braking Method | Full-wave DC injection |
| Braking Time | Adjustable |
| Enclosure | DIN rail mount / Panel mount |
Maximum Safety
Eliminates dangerous coast-to-stop times. Protects machinery and operators from rotating loads.
Increased Productivity
Stops AC motors quickly — eliminating lost production time waiting for loads to coast to a stop.
Maintenance Free
Eliminates wear and tear on mechanical brakes — no discs or pads to replace.
Easy to Install
Wire directly into the motor starter circuit — no isolation contactors or additional logic wiring required.
ABC Series
Technical Specifications
Current Rating
7 to 1,000 Amps. Standard Duty: sized for 95–110% motor FLA. Extra Duty: sized for 150–250% motor FLA. Specify maximum braking current and voltage when ordering.
Voltage Ratings
190 – 600 VAC, 50/60 Hz
Output Capacity
500% for 60 sec.
Power Circuit
Full wave bridge, 4 SCRs, designed for use without isolation contactors.
Fusing
Approved for use with existing motor starter fusing when unit is sized for motor FLA. Consult NEC for any other fusing requirements.
Control Method
Microprocessor controls sequencing, I/O monitoring and status. Braking current is adjustable via true RMS regulated control using phase angle firing of SCRs.
Transient Protection
RC snubber dv/dt circuit on each SCR device.
Control Circuits
Self-powered directly from line terminals — no separate control voltage required.
Outputs
Starter Coil Interlock: two sets of Form C relay contacts to interlock the starter coil and prevent energizing while braking power is applied.
Mechanical Brake Release: N.O. relay contact for controlling an electro-mechanical holding brake.
Aux Contact Ratings
5 amps, 250 VAC max.
LED Status Indicators
Large LEDs: Braking (green), Fault (red).
Small LEDs: Power On, Jog/Armed, Brake Off, Disabled, Over Temp, Wiring Error.
Operator Adjustments
Brake Time and Jog Time = 7-position binary dipswitch.
Brake Current = potentiometer.
Adjustment Ranges
Brake / Jog Times: 0–127 seconds in 1-second increments
Brake Current: up to 100% of unit rating
Operating Design Temperature
0–50°C (32–122°F) open chassis
0–40°C (32–104°F) enclosed
Ambient Conditions
20–95% relative humidity
0–3,300 ft (1,000 m) elevation
Approvals
UL, cUL Listed