Mitsubishi Electric MELSEC iQ-F FX5U User Manual page 123

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 element or the PCB. To prevent
this, a protection fuse should be inserted at the output.
Load
Y0
Fuse
COM1
Terminal
■Minute current load
C-R absorbers are connected in parallel at the triac output circuit for turning
off the triac. When a minute current load of 0.4 VA or less/100 V AC or 1.6
VA or less/200 V AC is connected, a surge absorber must be connected in
parallel with the load. Select a surge absorber with the rated voltage that is
suitable for the output used. For other specifications, refer to the following.
Standard
Electrostatic capacity: Approx. 0.1 F
Resistance: Approx. 100 to 200 
■Interlock
For loads such as forward/reverse contactors, etc., where a hazardous condition could result if switched ON simultaneously,
an external interlock should be provided for interlocking along with an interlock in the PLC program as shown below.
Limit of forward
Interlock
U U
Limit of reverse
U
PLC output
element
■In-phase
PLC output contacts (*1) should be used in an "in-phase" manner.
*1
U
*1
U
*1
U U
module
rotation
Forward
rotation
Reverse
rotation
rotation
*1
U
Minute current load
Surge
U U
absorber
6 WIRING
6.6 Output Wiring
6
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