Mitsubishi Electric NZ2MFB2-16A - Page 110

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11 TROUBLESHOOTING
11.4 Examples of Troubles with the I/O Module
An input signal does not turn off No.5
■Cause
By using two power supplies, a sneak path is configured.
■Action
• Use one power supply.
• To prevent the sneak path, connect a diode as shown below.
E1 E2
E1 > E2
DC input
Input module
E1 E2
DC input
Input module