VB 230/400-25
7
Approx. 1.5s after a motor standstill has been detected, the integrated standstill detection function
switches the braking current off.
If during the maximum braking time (15s in the case of standard devices) no motor standstill is
detected, the fault signaling contact on the terminals X7, X8 (alarm) opens. When restarting the
motor, the signaling contact will be reset.
Warning note:
In the case of some motor types no standstill will be detected if the braking
current exceeds four times the amount of the rated motor current. In this
case it is possible that a very high braking current flows over the maximum
braking time. Therefore, in order to protect the motor and the braking
electronics, it is absolutely necessary to check the braking current with a true
r.s.m. measuring instrument when putting the device into operation. In this
case, simple multimeters and clamp-on probes give wrong measurements,
since they are only suitable for pure sine-wave forms and not for phase
control.
Note:
If, due to the fact that heavy rotating masses are to be slowed down, the
braking time at rated device current is still too long, a device of the next
higher performance category is to be used.
7.1
LED indicators
7.2
Fault signaling relay
The following states on the fault signaling contact (terminal X7, X8) are possible:
LED – ready - illuminated
- flashing
Mains voltage is applied, braking device is ready.
Braking current is higher than rated device current.
LED – I
- illuminated
Braking current flows.
No voltage applied to VersiBrake
Contact X7, X8 open
Voltage applied to VersiBrake, no fault
Contact X7, X8 closed
Overtemperature at the motor, only with option „P“
Contact X7, X8 open
No standstill is reached during monitoring time
Contact X7, X8 open
a
a. Closes at motor restart.
