Connecting Stepper Motor Power Units - Siemens SIMATIC S5 Manual

3.3.3

Connecting Stepper Motor Power Units

Three stepper motor power units can be connected to the module (X4, X5, X6). The signals
"clock pulse" (T), "direction level" (RP) and "reset" (RS) are supplied via special output stages,
which can be operated with 5 V, 24 V or with a special voltage US (5 V to 24 V), This allows power
units with 5 V differential inputs (RS 422) or optocoupler inputs (5 V/20 mA, 24 V/20 mA) b be
connected. If a special voltage US (5 V to 24 V) is used via connector X7, the outputs of the mod-
ule can also be operated with this voltage,
The three interfaces must be operated with the same voltage.
The output circuit is shown schematically in the following figure for an output signal (e.g. clock
pulse 1).
Load power supply
unit 24 V
Fig. 3/6 Output circuit for controlling power units
Connection of power units with 5 V differential inputs
You must set the jumpers on the module as follows:
jumper X30/2-4 inserted (5 V)
jumper X31/2-3 inserted (O ~
You must connect the power unit as shown in Fig. 3/7.
xl
9
Chassis
(M
(
3 2 1
Operation
3-11