Mitsubishi Electric NZ2MF2S1-32D User Manual page 113

When the output module is off, the LED connected as a load dimly turns on
■Cause
The load operates by the leakage current when the output module is off.
Output module
Sink output
Y0
COM-
■Action
Connect a resistor of 5 to 50k in parallel with the LED load.
When a digital display unit is connected as a load, the display may not be normal
■Cause
The load operates by the leakage current when the output module is off.
Countermeasure
Output module
Sink output
Y0
CTL+
COM-
■Action
Install a pull-up resistor of 5 to 50k and 0.5 (W) between the outputs of 24VDC power supply and the output module.
Countermeasure
LED
24VDC
Digital display unit
(input signal section)
24VDC
Dedicated IC
11.4 Examples of Troubles with the I/O Module
11 TROUBLESHOOTING
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