Mitsubishi MELSEC iQ-F FX5UC, User Manual

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6 WIRING
6.5 Input Wiring
6.5
Input Wiring
The input wiring of the CPU modules, I/O modules, and terminal modules is explained below.
24 V DC input
For input specifications of the CPU modules, refer to

Page 22 Input Specifications.
For input specifications of the I/O modules, refer to

Page 144 Input specifications.
For input specifications of the terminal modules, refer to

Page 161 Input specifications.
Sink and source input
■ Differences between the sink input circuit and the source input circuit
• Sink input [-common]
• Source input [+common]
■ Switching between sink/source inputs
Sink and source inputs for FX5UC-  MT/DSS are switched by changing connection methods; the connection in which the
current flows from the input (X) terminal or the connection in which the current flows into the input (X) terminal.
• Sink input: The connection in which the current flows from the input (X) terminal (

Page 90 Sink input wiring)
• Source input: The connection in which the current flows into the input (X) terminal (

Page 91 Source input wiring)
Inputs (X) of FX5UC-  MT/DSS can be set to either sink input or source input. However, sink and source input
modes cannot be mixed.
Sink input means a DC input signal with a current flowing from the input (X) terminal. When a device such as a transistor
output type sensor is connected, NPN open collector transistor output can be used.
Circuit example for FX5UC-32MT/D Circuit example for FX5UC-32MT/DSS
Source input means a DC input signal with a current flowing into the input (X) terminal. When a device such as a
transistor output type sensor is connected, the PNP open collector transistor output can be used.
Circuit example for FX5UC-32MT/DSS
X
COM
Photocoupler
*1: Input impedance
*1
Fuse
24 V
DC
X
COM0
Photocoupler
*1: Input impedance
*1
Fuse 24 V
DC
X
COM0
Photocoupler
*1: Input impedance
*1
Fuse
24 V
DC