Omron CP1E Series User Manual page 77

Estimating the Service Life of Relays
Under normal conditions, the service life of output contacts is as shown above. The service life of
relays is as shown in the following diagram as a guideline.
500
300
200
100
50
30
20
10
125 VAC cosφ= 0.4
5
3 250 VAC cosφ= 0.4
2
0.1 0.2
Relationship between Continuous Simultaneous ON Rate and Ambient
Temperature
There are restrictions on the power supply voltage and relay output load current imposed by the
ambient temperature. Make sure that the power supply voltage and relay output load current are
within the following ranges.
CP1E-N20DR-D
100%
Power voltage
DC21.6V
50%
Power voltage
DC20.4V
0%
Ambient temperature
Note The above restrictions apply to the relay output load current from the CPU Unit even if Expansion I/O Units
are not connected.
CP1E CPU Unit Hardware User's Manual(W479)
CP1E- 20DR-
125-VAC resistive load
30-VDC/250-VAC resistive load
30 VDC, τ = 7ms
0.3 0.5 0.7 1 2 3 5
Contact current (A)
CP1E-N30DR-D
100 %
50%
0%
40 45 55 ˚C
3 Part Names and Functions
CP1E- 30/40DR-
10
Power voltage
DC21.6V
Power voltage
DC20.4V
35 45 55˚C
Ambient temperature
CP1E-N40DR-D
100%
Power voltage
DC21.6V
50%
Power voltage
DC20.4V
0%
30 45 50 55 ˚C
Ambient temperature
3
3-13