Installation
4.2 Electrical Installation
Converter with control units CU250D-2
50 Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
Connecting the motor holding brake
Danger to life when live parts are touched in the motor terminal box
The temperature sensor and motor holding brake connections are at DC link negative
potential. Touching these connections can result in death or severe injury.
• Keep the motor terminal box closed whenever the mains is applied to the converter.
• Use appropriate insulation on the cables.
• Insulate cables that are not used
Device damage by earthing the motor cable
The temperature sensor and motor holding brake connections are at DC link negative
potential. Earthing these connections will damage the device.
• Use appropriate insulation on the cables.
• Insulate cables that are not used.
• Do not earth cables that are not used.
The brake is connected to the converter using Pin 4 - Brake (-) and Pin 6 - Brake (+) of the
motor connector.
The converter supplies 180 V DC to the brake.
The brake supply is suitable for brakes which require 400 V AC with rectifier. Remove the
rectifier module and connect the brake output of the converter directly to the brake coil.
Figure 4-14 Principle of connectiong the motor holding brake to the converter
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