Bosch 4306 Service Manual download pdf (Page 38)

• DOK-POWER*-KDV*2.3****-ANW1-EN-E1,44 • 06.97

5. Interface descriptions

5.5. Power supply working

Output UD, terminal X10/11 - X10/12

Potential-free contact, maximum load DC 24V/1A

UD contact

Operating no power to power supply

status: the electronics faulty functional

Output open open closed

The UD contact acknowledges that the power supply system is working.

It opens for the following faults:

• mains or phase failure, or,

• the DC bus voltage is less than 200 V

The response of the drive system to these errors depends on the NC bridge

(see section 5.6).

If an NC controlled braking becomes necessary, then the drives

must be braked to a standstill by the superordinate NC control unit

when the UD contact opens!

5.6. Bringing the drives to a standstill with a fault in

the power supply system

NC bridge, terminals X10/13 - X10/14

Given a fault in the power supply and within the drive systems, the velocity

command of all connected drives is switched to zero if the NC bridge is open.

The drives are braked at maximum torque. In the presence of a drive fault, the

Bb1 contact additionally switches off the power.

If the NC bridge is closed, then the command-to-zero is suppressed with the

following faults:

• fault in the power supply system

- mains or phase failure

- DC bus voltage less than 200V

• drive fault

- an open wire-ribbon connection or missing termination connector

- the heatsink temperature of the KDV 2.3 is too high

- ground short in the drive module

- bleeder overloaded

NC bridge

Open

Closed

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Bosch 4306 Service Manual Page 38