Mitsubishi Electric MELSEC-L Series User Manual page 25

(3) Precautions for using the contact output module
When using the contact output module, consider the following.
• Relay life (contact switching life)
• Effects to relay life due to connected load
• Measures against back EMF
(a) Relay life (contact switching life)
Applicable module      LY10R2, LY18R2A
The relay life depends on the operating environment. Select a module according to the operating environment.
The relay lives shown below are the actual service values, not the guaranteed values. Replace the module well
in advance since the actual switching life may be shorter than the one shown below.
200
100
70
50
30
20
Switching life
(10,000 times)
10
7
5
3
2
1
0.1
Operating environment
Rated switching voltage/current, rated load
200VAC 1.5A, 240VAC 1A (COS = 0.7)
200VAC 0.4A, 240VAC 0.3A (COS = 0.7)
200VAC 1A, 240VAC 0.5A (COS = 0.35)
200VAC 0.3A, 240VAC 0.15A (COS = 0.35)
24VDC 1A, 100VDC 0.1A (L/R = 7ms)
24VDC 0.3A, 100VDC 0.03A (L/R = 7ms)
100VDC
= ms 7
(L/R) : Time constant
cos : Power factor
0.2 0.3 0.5 0.7 1
Switching current (A)
CHAPTER 3 BEFORE USING I/O MODULE
30VDC =0ms
100VAC cos =0.7
200VAC cos =0.7
100VAC cos =0.35
200VAC cos =0.35
24VDC =7ms
120VAC cos =0.2
240VAC cos =0.2
2 3 5
Switching life
100 thousand times
100 thousand times
300 thousand times
100 thousand times
300 thousand times
100 thousand times
300 thousand times
3
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