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4.8.2. Control line surveillance
Function for detecting a wiring fault in the cable connected to the external control output device can be set to
the control input terminals of the SX-2000SM and SX-2000CI.
Connect the resistors to the cable of which fault is to be detected as shown below.
For the method of setting the fault detection function to the control input terminals, refer to the separate Setting
Software Instructions.
Notes
• Be sure to connect the resistors as shown in the diagram below.
If no resistors are connected or resistors other than specified are used, the fault detection function will not
work correctly.
• To assure stable operation of this wiring fault detection, it is recommended to use a shielded twisted pair
cable of 10 m or less.
Notes
• The figure shows a connection example for the SX-2000SM. This connection also applies to the SX-2000CI.
• Be sure to connect each shield wire to the functional ground terminal of each device.
Control output terminals of the external device
SX-2000SM
Cable of which fault is to be detected
10 kΩ±5%
10 kΩ±5%
Control input terminals
