X20(c)SC2212
Data sheet V1.141 X20(c)SC2212 Translation of the original documentation
13
7.1.3 Using external GND and GND from connection element
A
2
Actuator
Type B output
Logic
SELV
24 V
GND
1
Protection
IOUT
IGND
SOx
GND
Figure 5: Possible connection error
Fault sequence:
•
Fault
①
(open circuit on module GND):
No error is detected and the module continues to operate normally due to the additional external GND
connection.
•
Fault
②
(open circuit on actuator's protective circuit):
The module loses its direct connection to GND and current begins to flow through I
GND
→ damping diode
→ actuator.
As a result, current above the maximum value permitted by the module is supplied to the actuator.
Danger!
This type of installation can cause hazardous situations and is therefore NOT permitted.
Possible remedies
This wiring method could be made possible, for example, by using two wires to complete the connection that
experienced the open circuit fault in
②
→ see connection
Ⓐ.
Information:
The diode in the actuator shown in the "Possible connection error" image is intended only to illustrate
the error and is not mandatory.