2
0
1
8
-0
6
28
Installation
Figure 3.4
Flat cable inserted incorrectly (profile edge as dotted line)
3.5
Special Requirements when Connecting to a PLC
The electrical signals from the zone coupling interfaces are compatible with the standard 24 V
IOs of a PLC.
■
The inputs (X1 IN, X2 IN) are galvanically isolated. Therefore, there are no special
requirements for the connection of other potentials.
■
The outputs (X1 OUT, X2 OUT) are powered directly by the power supply of the ZPA
motor control module. Therefore, there is a risk of ground loops when connecting to other
potentials
3.6
Connecting Motors, Sensors, and Zone Coupling
Figure 3.5
1
2
Caution!
Malfunctions with ground loops
Because the outputs of the ZPA motor control module are not galvanically isolated,
equalization currents could flow through their ground lines. Therefore, connect the zone
coupling outputs (X1 OUT, X2 OUT) only to galvanically isolated, current-consuming inputs of a
PLC input/output card.
A common ground of the PLC input/output card may be connected to other ZPA motor control
modules, but not to their power supply.
If the specified rules are not followed, malfunctions may occur in the interconnected
components.
X1
X2
IN1
MOT1
IN2
MOT2
P
W
R
X
1
IN
X
1
O
U
T
X
2
IN
X
2
O
U
T
M
O
T
1
M
O
T
2
E
R
R
1
E
R
R
2
IN
1
IN
2
