
6 WIRING
6.5 Input Wiring
109
6
6.5
Input Wiring
The input wiring of the CPU module, I/O modules, and terminal modules is explained below.
24 V DC input (Sink and source input type)
For input specifications of the CPU module, refer to
For input specifications of the I/O modules, refer to
Page 179 Input specifications.
For input specifications of the terminal modules, refer to
Page 196 Input specifications.
Sink and source input
■
Differences between the sink input circuit and the source input circuit
■
Switching between sink/source inputs
To switch the input type to sink or source input, wire the [S/S] terminal to the [0V], [-] or [24V], [+] terminal.
In the case of AC power supply type
• Sink input: Connect the [24V] terminal and [S/S] terminal. (
Page 115 Sink input [AC power supply type])
• Source input: Connect the [0V] terminal and [S/S] terminal. (
Page 116 Source input [AC power supply type])
In the case of DC power supply type
• Sink input: Connect the [+] terminal and [S/S] terminal. (
Page 117 Sink input [DC power supply type])
• Source input: Connect the [-] terminal and [S/S] terminal. (
Page 118 Source input [DC power supply type])
All inputs (X) of the CPU module can be set to either sink input or source input by selection.
•
Sink input [-common]
•
Source 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 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.
24V
N
L
X
S/S
0 V
24V
N
L
X
S/S
0V
Summary of Contents for 09R536
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