Mitsubishi Electric MELSEC iQ-F Series User Manual page 198

Wiring precautions
■Protection circuit for load short-circuiting
A short-circuit at a load connected to an output terminal could cause burnout at the output device or the PCB.
To prevent this, a protection fuse should be inserted at the output. Use a load power supply capacity that is at least 2 times
larger than the load current.
Module
FX5S CPU module
FX5UJ CPU module
FX5U CPU module
FX5UC CPU module
■Contact protection circuit for inductive loads
When an inductive load is connected, connect a diode (for commutation) in parallel with the load as necessary.
The diode (for commutation) must comply with the following specifications.
Item
Reverse voltage
Forward current
Module
FX5S CPU module
FX5UJ CPU module
FX5U CPU module
FX5UC CPU module
13 WIRING
196
13.6 Output Wiring
Sink output
Load
Y
Fuse
COM0
Load
Y
Fuse
COM0
COM0
Sink output
Inductive load
Y
Fuse
COM0
Inductive load
Y
Fuse
COM0
COM0
Source output
Programmable
controller
Programmable
controller
Standard
5 to 10 times as high as the load voltage
Load current or larger
Source output
Programmable
controller
Programmable
controller
Load
Y
Fuse
+V0
Programmable
controller
Load
Y
Fuse
+V0
+V0
Programmable
controller
Inductive load
Y
Fuse
+V0
Programmable
controller
Inductive load
Y
Fuse
+V0
+V0
Programmable
controller