Rockwell Automation Publication 750-UM006C-EN-P - March 2022
161
Drive Maintenance
Chapter 5
Replace the Auxiliary Circuit
Breakers (5CB070 and
1CB250 or 5CB130)
The door seal on the auxiliary circuit breaker door is not replaceable, if the
door seal is leaking or degraded below a level of acceptable function, a new
front cover will need to be ordered.
1. Follow the procedure to
2. Follow instruction to
Remove the Front Cover on page 148
3. Use a
flathead screwdriver
to disconnect the wires from the breaker
that needs to be replaced
.
4. Use a
flathead screwdriver
to loosen the two screws from the end
anchors that secure the auxiliary breakers to the DIN rail.
Circuit Breaker Description
Catalog Number
400/480V AC source mechanical brake
140M-C2E-B25/140MT-C3E-B25
Auxiliary Contact for Source brake CB
140M-C-AFA10/140MT-C-AFA10
24V DC control power
1489-M2D040
24V DC mechanical brake
1489-M2D040
Auxiliary Contact for 24V DC brake CB
1489-AMRA3
Breaker Type
Wire Description
Terminal Number
Source-brake auxiliary circuit
breaker (1CB250)
1CB250-1
1
1CB250-2
2
1CB250-3
3
1CB250-5
5
1CB250-4
4
1CB250-6
6
1CB250-13
13
1CB250-14
14
24V DC brake auxiliary circuit
breaker (5CB130)
5CB130-1
1
5CB130-3
3
5CB130-2
2
5CB130-4
4
5CB130-11
11
5CB130-14
14
24V DC control power auxiliary
circuit breaker (5CB070)
5CB070-1
1
5CB070-3
3
5CB070-2
2
5CB070-4
4
ATTENTION:
Use caution when removing auxiliary breakers from DIN rail.
Failure to use caution could result in personal injury or equipment damage.
