YASKAWA Sigma-V Series User Manual page 71

Ac servo drives

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4 Wiring and Connection

4.6.2 Connecting a Dynamic Brake Unit

• Using NC Contacts for the Dynamic Brake Contactor

24 V

∗ The above figure is for using a dynamic brake contactor with NC contacts. The dynamic

brake answer signal (a signal from NC auxiliary contacts) is input to CN1-45. To indicate an

error if the input signal to CN1-45 turns OFF (open) while the dynamic brake is activated, the

Pn515 parameter in the multi-winding drive unit must be set to n.E. If the dynamic

brake answer signal is not used, Pn515 is set to n.8 (default setting).

Note: 1. If you assign more than one signal to the same input circuit, OR logic will be used

4-28

SERVOPACK

CN1

45*

CN115

DB24

DBON

0 V

and any of the input signals will cause the circuit to operate. This may result in unex-

pected operation.

2. The maximum current for DB24 and DBON is 300 mA.

Dynamic brake contactor

(Auxiliary contacts)

Main circuit surge

absorption unit

Coil surge

absorption unit

For I/O

power supply

24 V

0 V

Dynamic brake resistor

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S-v series