Input Wiring; 24 V Dc Input - Mitsubishi MELSEC iQ-F series User Manual

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]
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
Photocoupler
*1
*1: Input impedance
• Source input [+common]
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
Photocoupler
*1
*1: Input impedance
■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.
6 WIRING
84
6.5 Input Wiring
Fuse
24 V
DC
COM
X
24 V
Fuse
DC
COM0
X
Circuit example for FX5UC-32MT/DSS
Photocoupler
COM0
*1
X
*1: Input impedance
Fuse 24 V
DC