Brake Circuitry
Page 8 - 6
Electrical
Troubleshooting Guide
IRB6400 M94A
Motors ON Brake Release (Cont)
The KM4 relay has four sets of normally open contacts
and two sets of normally closed contacts on it.
Normally OPEN contacts 1 and 2 are supplied for
customer use on XS3/XT3 terminals C10 and C11.
Normally CLOSED contacts 51 and 52 when opened
disable the brake push buttons.
Normally OPEN contacts 5 and 6 can be used to
release external axes (axes 7-12) brakes, if applicable.
Normally OPEN contacts 33 and 34 can be used to
control a blower fan in Axis 1, if applicable.
Normally CLOSED contacts 21 and 22 are used to
disable the KM3 relay when KM4 is energized.
Normally OPEN contacts 3 and 4 (which along with
KM1 and KM2 contacts 7 & 8):
- Sends 24 VDC to XS1 pins B12 and B13.
- From there, 24 VDC goes to R1.MP pins B12 and
B13.
- To the brake unit R3.X8 pins 1 and 2.
- Once on the brake unit, the 24 VDC goes through
normally closed contacts on each individual axis
brake release push buttons.
- Then to each individual axis brake.
For example:
- For Axis 1, 24 VDC would go out R3.X9 pin 10 and
then to the motor connector R2.MP1 pin L. Then to
the brake coil. The other side of the coil would
return to 0 VDC. The other axes would work similarly.
Fig. 8-1 ............
Sheet 9, line 13 ............
Sheet 9, line 13 ............
Sheet 9, line 13 ............
Sheet 9, line 13 ............
Sheet 9, line 04 ............
Fig. 7-1 ............
Sheet 9, line 13 ............
Sheet 13.1, line 14........
Fig. 8-3 ............
Sheet 105, line 11.........
Sheet 104, line 01.........
Fig. 8-5 ............
Sheet 104, line 09.........
Sheet 105, line 06.........
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