Calculating The Power Dissipation - Eaton ESR5-NO-31-UC Manual

14 Calculating the power dissipation

The total power dissipation of the safety relay is based on the
input power dissipation and the contact power dissipation for the
same and for different load currents.
Input power dissipation
P = 2,7 W (at DC)
Input
P = 2,9 W (at AC)
Input
Contact power dissipation
With the same load currents:
P = n • IL² • 200 mΩ
Contact
Bei unterschiedlichen Lastströmen:
P = (IL1² + IL2² + ... + ILn²) • 200 mΩ
Contact
Total power dissipation
P = P + P
Total Input Contact
therefore
P = P + n • IL² • 200 mΩ
Total Input
or
P = P + (IL1² + IL2² + ... + ILn²) • 200 mΩ
Total Input
Key:
P Power dissipation in mW
n Number of enabling current paths used
IL Contact load current
Manual ESR5-NO-31-UC 07/2017 MN049014 EN www.eaton.com
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