NOTICE!
Risk of damaging the PLC modules!
Overvoltages and short circuits might damage the PLC modules.
– Make sure that all voltage sources (supply and process voltage) are
switched off before you begin with operations at the system.
– Never connect any voltages or signals to reserved terminals (marked with
---). Reserved terminals may carry internal voltages.
For the open-circuit detection (cut wire), each channel is pulled up to "plus" by a
high-resistance resistor. If nothing is connected, the maximum voltage will be
read in then.
Analog signals are always laid in shielded cables. The cable shields are earthed
at both ends of the cables. In order to avoid unacceptable potential differences
between different parts of the installation, low resistance equipotential bonding
conductors must be laid.
For simple applications (low electromagnetic disturbances, no high requirement
on precision), the shielding can also be omitted.
The following figures show the electrical connection of the PROFIBUS DP bus module CI541-
DP.
+
-
+
-
+
-
+
-
+
-
+
-
PTC
AI0+
AI1+
AI2+
AI3+
AI-
2.0
2.1
2.2
2.3
2.4
PTC
2.5
2.6
2.7
AO0+
AO1+
AO-
4.0 DO0
4.1 DO1
4.2 DO2
4.3 DO3
4.4 DO4
4.5 DO5
4.6 DO6
4.7 DO7
DI0 3.0
DI1 3.1
DI2 3.2
DI3 3.3
DI4 3.4
DI5 3.5
DI6 3.6
DI7 3.7
2.8
2.9
UP +24 V
ZP 0 V
3.8
3.9 3.9
3.8
UP3 +24 V
ZP 0 V
Connection of the Digital Inputs
The following figure shows the electrical connection of the digital input DI0. Proceed with the
digital inputs DI1 to DI7 in the same way.
Communication Interface Modules (S500) > PROFIBUS
2019/04/17 3ADR010121, 13, en_US 949
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