Siemens SIMATIC S5 Manual page 279

Planning
Note
and X6 must be inserted between pins 7 and 8. In the specially made connecting ca-
bles the white and black wires at the open end must be connected together.
Select the required mode, full step or half step on the power unit.
Wire any required enable signals for the power unit (current drop, burst)
externally,
Set the motor current according to the instructions of the power unit
manufacturer.
Connect the cables to the IP247:
24 V for digital outputs (FASTON terminal)
signals to power unit channel 1
signals to power unit channel 2
signals to power unit channel 3
connections to the switches and "position reached" indicator
programmer (can be connected or disconnected at any time).
All the plug-in connections should be screwed tight,
If the 24 V at the FASTON terminal is supplied by an external power supply unit, the
ground of this voltage source must be connected to the chassis of the programmable
controller.
If you use a special voltage for the signals to the power units, and the positive pole is
connected to X7, pins 23, 24 and 25, you must connect the negative pole (ground) with
the chassis of the programmable controller.
7 - 1 2
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