Sample application
Operating manual ASP 5001
ID 442181.07
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6
6
Sample application
6.1
Description
This example shows the implementation of the STO safety function when using an inverter from the 5th
generation of STOBER inverters (xDS 5000) in conjunction with a moving and separating safety device and
a safety relay.
The safety function in this example is triggered by opening the safety doors, which is detected via the position
switch (B1/B2) of the safety relay (K1).
Both switchoff paths (T1a, T1b) are controlled in the xDS 5000 via the enable contacts of K1. As well as the
STO safety function, the SS1 safety function can also be realized by using a suitable safety relay (K1) if K1
has corresponding enable contacts with a time delay available.
Switch-off path 1
The switch-off path 1 in the xDS 5000 (T1a) is activated via the controller enable input. The generation of the
pulse pattern is blocked in the control unit by switching the signal at this input to low level. This occurs
immediately for the STO safety function after requesting the safety function. For the SS1, a stop ramp must
be parameterized in the xDS 5000 so that the drive can be initially stopped in a controlled manner before the
generation of the pulse pattern is blocked. The control unit can respond to the safety relay (K1) via the binary
output and a coupling relay (K2).
Switch-off path 2
The second switch-off path in the inverter provides a safety relay (T1b) with a NO contact (make contact
element) that switches off the controller for the driving stage. This relay is accommodated on the ASP 5001
option. Switchoff occurs immediately after the request for the safety function for the STO and with a
corresponding time delay for the SS1. The positively-driven NC contact (break contact element) of the safety
relay (T1b) is included in the feedback loop of the safety device (K1) for fault coverage.
Fig. 6-1Schematic diagram
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