Mitsubishi Electric MELSEC iQ-R Series User Manual page 79

■Connecting the FG signal and shield
Connect the FG signal and shield of a connection cable as follows:
Connection cable
FG signal of the cable
• Do not short-circuit the FG and SG signals of a connection cable.
• When the FG and SG signals are connected inside of the peripheral device, do not connect the FG signal to this product.
■Connecting an AC-powered device that does not have a grounding wire
When connecting an AC-powered device that does not have a grounding wire, install the device by the following procedure.
1.
Check that a device to be connected is unplugged from the AC receptacle.
2.
Connect the device to this product with an RS-232 connection cable.
3.
Plug the device to the AC receptacle.
Connection to this product
Connect the FG signal of the cable to the connector housing of this product.
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7.4 RS-232 Connector
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