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9.4 Service Life of Output Relay
The output relays of the modules are consumed by the switching operation.
A relay which is directly mounted on the print board of the output module is required
to be replaced the output module itself after the consumption.
Switching current (unit: A)
0.1 0.5 1 2 10
1
2
5
10
20
50
Limit number of switching (unit: 10,000)
DC100V
t=7ms
DC24V
t=7ms
DC30V
t=0ms
100
1000
200
500
AC100V COS =0.7
AC200V COS =0.7
AC100V COS =0.35
AC200V COS =0.35
0.2 5
Figure 9.3 Life characteristics of output relay's contact (QY10, QY18A)