Mitsubishi FX3UC SERIES User Manual page 142

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
5.1 Sink and source input (24V DC input type)
Inputs (X) in the FX
MT/DSS are sink/source common input type. Inputs in FX
either sink input type only or sink/source common input type depending on the product.
1. Sink input [-common]
An input (DC input signal) used where the current flows out of the input (X) terminal is called a sink input.
NPN open collector transistor outputs are available when transistor output type sensor outputs are
connected.
Examples of the FX
•
FX -32MT-LT
3UC
Photocoupler
2. Source input [+common]
An input (DC input signal) used where the current flows into the input (X) terminal is called a source input.
PNP open collector transistor outputs are available when transistor output type sensor outputs are connected.
• Examples of the FX
Photocoupler
3. How to change a sink input for a source input for the FX
Sink inputs and the source inputs can be changed over in the FX
- Selected by the connection that makes the current flow out of the input (X) terminal.
- Selected by the connection that makes the current flow into the input (X) terminal.
4. Instructions for using
• Concurrent use of sink/source input
Inputs (X) in the FX
It is not allowed to use both sink inputs and source inputs together.
• Caution in selecting model
Each input extension block is either sink input type only or sink/source common input type.
It is not allowed to use both types of input extension blocks together.
136
- MT/D and FX
3UC
- MT/D,
3UC
Fuse 24V
DC
COM
*1
X
*1.Input impedance
- MT/DSS
3UC
24V
Fuse
DC
COM0
*1
X
*1.Input impedance
- MT/DSS can be wired either for sink inputs or source inputs.
3UC
5.1 Sink and source input (24V DC input type)
-32MT-LT are sink input type only. Inputs (X) in the FX
3UC
/FX
2N
Examples of the FX
•
Photocoupler
3UC
3UC
5 Input Specifications and External wiring
Series input extension blocks are
2NC
- MT/DSS
3UC
Fuse
COM0
*1
X
*1.Input impedance
- MT/DSS
- MT/DSS by connection as follows:
-
3UC
24V
DC