■Output current
Maximum load differs for each module. For specifications of each module, refer to the following.
For output specifications of the CPU module, refer to Page 36 Output Specifications.
For output specifications of the I/O modules, refer to Page 195 Output specifications.
For output specifications of the terminal modules, refer to Page 214 Output specifications.
When driving a semiconductor device, carefully check the input voltage characteristics of the device.
■Open circuit leakage current
0.1 mA or less
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.
Load
Fuse
■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.
Standard
Reverse voltage
Forward current
Inductive load
Fuse
■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.
Sink output type
+
Limit of forward
Interlock
rotation
Limit of reverse
rotation
Sink output type
Y
COM0
PLCs
5 to 10 times as high as the load voltage
Load current or larger
Sink output type
Y
COM0
PLCs
-
Forward rotation
Reverse rotation
PLC output
element
Source output type
Load
Y
Fuse
+V0
Source output type
Inductive load
Y
Fuse
+V0
Source output type
-
Limit of forward
Interlock
rotation
Limit of reverse
rotation
PLCs
PLCs
+
Forward rotation
Reverse rotation
PLC output
element
6 WIRING
6.6 Output Wiring
6
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