Mitsubishi Electric NZ2GN2B1-32D User Manual page 104

■Action
Take one of the two actions shown below.
1.To suppress the back electromotive force, connect a diode parallel to the load where back electromotive force is generated.
• Sink output
[3]
Back electromotive
+ force -
Load
• Source output
[3]
Back electromotive
-
+
force
Load
2.Configure another current path by connecting a diode across positive and negative of the external power supply. When
taking the action described in Example 1 at a time, connect a diode parallel to C1 and R1.
Sink output
Y0
ON
Y1
OFF
COM-
CTL+
Source output
Y0
ON
Y1
OFF
COM+
CTL-
D1:
Reverse voltage VR (VRM)
Forward current IF (IFM)
*1 Approximately 10 times the rated voltage in the specifications
Example: 24VDC → Approx. 200VDC
*2 Twice the maximum load current (common) in the performance specifications or more
Example: 5A/1 common → 10A or more
11 TROUBLESHOOTING
102
11.5 Examples of Troubles with the I/O Module
Back electromotive
[3]
force
Load
[2]
Load
[1]
Shut off
D1
C1 R1
Example 1
Back electromotive
[3]
force
Load
[2]
Load
[1]
Shut off
D1
C1 R1
Example 1
*1
*2