Brake Circuit Commissioning - ABB ACS800-U4 Hardware Manual

With Standard Application Program, wire the thermal circuit breaker as follows. By
default, the drive will stop by coasting when the circuit breaker opens. .
For other application programs, the thermal circuit breaker may be wired to a
different digital input and programming of the input to trip the drive by "EXTERNAL
FAULT" may be needed. See the appropriate firmware manual.

Brake circuit commissioning

For Standard Application Program:
• Enable the brake chopper function (parameter 27.01).
• Switch off the overvoltage control of the drive (parameter 20.05).
• Check the resistance value setting (parameter 27.03).
• Frame sizes R6, R7 and R8: Check the setting of parameter 21.09. If stop by
coasting is required, select OFF2 STOP.
For the use of the brake resistor overload protection (parameters 27.02...27.05),
consult an ABB representative.
WARNING! If the drive is equipped with a brake chopper but the chopper is not
enabled by parameter setting, the brake resistor must be disconnected.
Thermal circuit breaker
(standard in ABB resistors)
Q
RMIO:X22 or X2: X22
1 DI1
2 DI2
3 DI3
4 DI4
5 DI5
6 DI6
7 +24V
8 +24V
9 DGND
10 DGND
11 DIIL
111
Resistor braking