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20 Operation principle and hardware description
￭
Controlling the brake chopper from an external control location
The brake chopper can be controlled from an external control location via a fiber optic link
(terminals V22 and V23 on the chopper control board). Using the link, it is possible to
synchronize several brake choppers.
￭
Master-follower connection
When several brake choppers are in use, the first chopper in the chain acts as the master
for the other choppers. The voltage selection jumper of the master (1) is set to the appropriate
voltage at the factory, while the followers (2) are set to FIBER.
1
V22
V23
Type designation labels
￭
Brake unit type designation label
Each brake unit is equipped with a type designation label. An example label is shown below.
1
4
2
1
Type designation
2
Frame size
3
Serial number
• The first digit of the serial number refers to the manufacturing plant.
• The next four digits refer to the unit's manufacturing year and week, respectively.
• The remaining digits complete the serial number so that there are no two units or modules with the
same number.
4
Ratings
5
Valid markings
2
V23
V22
2
V22
V23
5
3
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