Handling Of Transistor Output - Mitsubishi FX3U SERIES User Manual

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition

12.3.3 Handling of transistor output

1. Output terminals
One, 4 or 8 transistor output points are covered by one common terminal.
Sink output
Load current flows into the output (Y) terminals.
Connect each COM
the load power supply.
The COM terminals are not connected internally.
Source output
Load current flows out of the output (Y) terminals.
Connect each +V
load power supply.
The +V terminals are not connected internally.
2. External power supply
For driving the load, use a smoothing power supply of 5 to 30V DC that can output current two or more times
the rated current of the fuse connected to the load circuit.
3. Insulation of circuit
The internal circuit of the PLC and the output transistor are insulated with a photocoupler.
The common blocks are separated from one another.
4. Display of operation
When any photocoupler operates, the corresponding LED lights and corresponding output transistor turns
ON.
214
(number) terminal to the minus side of
(number) terminal to the plus side of the
12.3 External Wiring of Transistor Output (Sink/Source) Type
DC power
Fuse
DC power
Fuse
Load
DC power
Fuse
Load
DC power
Fuse
12 Output Wiring Procedures
Sink output type
Load
Y 0
Y 1
supply
COM1
Load
Y 4
Y 5
supply
COM2
PLC
Source output type
Y 0
Y 1
supply
+V0
Y 4
Y 5
supply
+V1
PLC