Input Wiring; 24 V Dc Input - Mitsubishi Electric 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
For input specifications of the I/O modules, refer to
For input specifications of the terminal modules, refer to
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.
Photocoupler
*1
*1: Input impedance
■Switching between sink/source inputs
Sink and source inputs for FX5UC-32MT/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 (
• Source input: The connection in which the current flows into the input (X) terminal ( Page 65 Source input wiring)
Inputs (X) of FX5UC-32MT/DSS can be set to either sink input or source input. However, sink and
source input modes cannot be mixed.
Page 115 Input specifications.
Fuse 24 V
DC
COM
X
24 V
Fuse
DC
COM0
X
Page 18 Input Specifications.
Page 126 Input specifications.
Circuit example for FX5UC-32MT/DSS
Photocoupler
*1
*1: Input impedance
Page 64 Sink input wiring)
Fuse 24 V
COM0 DC
X
6