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 Remove Power
on page 146.
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.
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