Peter electronic 2C000.23020, Инструкции по сборке и пусконаладке

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VBMS .... 7
7. Functional description
The terminals for the „ON“ or „OFF“-buttons are connected to a 24V extra-low voltage that is
physically separated from the mains potential.
When actuating the „ON“-button connected with the terminals X1-X2, the integrated motor
contactor switches the motor on.
If one of the contacts on the terminals X3-X4, X5-X6 or X7-X8 is opened, the integrated motor
contactor switches off and initiates braking. During braking, the integrated motor contactor is
interlocked against switching-on. After a delay time which, dependent on the amount of the
remanent voltage of the motor, optimizes itself, the integrated braking relay pulls in. After the
contact bounce time has been waited out, a controlled d.c. current is fed into the motor winding.
The magnetic field resulting from this has a braking effect on the still rotating rotor. The d.c.
current is generated by a thyristor phase control. Special suppressor circuits protect the power
semiconductors against overvoltage.
With the potentiometer I, the braking current (and thus the braking torque) can be adjusted within
a range of 10 … 100% of the rated device current. The integrated motor standstill detection,
which functions via the amount of the remanent voltage, switches the braking current off approx.
1,5s after a motor standstill has been detected. To be able to adapt the device to a variety of
motors, it is possible to adjust the standstill threshold via the potentiometer n0).
Faults that occur during operation of the device are indicated via the „ON“ LED.
A motor protecting switch may additionally be wired in series before VBMS... device.
For this purpose, the wire jumper between 5L3 and 5L3’ has to be removed. The wiring is then to
be effected as illustrated in the connection diagram.
Warning notices:
To ensure a reliable standstill detection function, it is necessary to comply
with the following:The braking current must not exceed (3) three times the
amount of the rated motor current. If the VB-L is operated without the 6T3
(T3)-terminal beeing connected, which always applies in the case of single-
phase applications, it is to be ensured that braking current flows at least for a
period of 1.5 s before the motor comes to a standstill, as no motor standstill
is detected within this period of 1.5s and the braking current would then flow
over the total maximum braking time. This could cause destruction of the
motor and fault indications of the braking device.
Note: If the braking time at rated device current is too short, due to the fact that the
centrifugal masses to be slowed down are too large, either a device with a
longer braking time can be inquired of the producer or a device featuring a
higher rated current has to be used.