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5
INSTALLATION AND WIRING
This chapter describes the installation and wiring of the I/O module with diagnostic functions.
5.1
Before Using the I/O Modules with Diagnostic
Functions
Input module with diagnostic functions
Precautions when using the input module with diagnostic functions
■Measures against back EMF
When connecting an inductive load, connect a diode in parallel with the load. Use the diode that satisfies the following
conditions:
• A reverse breakdown voltage is more than ten times as high as the circuit voltage.
• A forward current is more than twice as high as the load current.
Negative common
IN
Inductive
load
COM
5 INSTALLATION AND WIRING
5.1 Before Using the I/O Modules with Diagnostic Functions
5
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