Input Wiring; 24Vdc Input (Sink And Source Input Type) - Mitsubishi Electric MELSEC iQ-F Series User Manual

13.5

Input Wiring

This section describes the input wiring of the CPU module, I/O modules, and terminal block.

24VDC input (Sink and source input type)

Sink and source input
■Differences between the sink input circuit and the source input circuit
Input circuit Description
Sink input [-common] Sink input means a DC input signal with current-flow 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.
Source input [+common] Source input means a DC input signal with current-flow into the input (X) terminal.
When a device such as a transistor output type sensor is connected, PNP open collector transistor output can be used.
The following figures show ladder examples.
Sink input [-common]
L
N
24V
0V
S/S
X
Source input [+common]
L
N
24V
0V
S/S
X
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13.5 Input Wiring