Switching Capacity And Service Life Of Contacts - Siemens SIMATIC ET 200S Manual

Switching capacity and service life of contacts

An external protective circuit offers a higher service life that that given in the table
below:
The NO and NC contacts of the relay have a different service life.
Table 11-29 Switching capacity and service life of contacts
Resistive load
For resistive load
ET 200S Distributed I/O System
EWA-4NEB 780602402-12
Voltage Current
24 VDC 5.0 A
4.0 A
2.0 A
0.5 A
0.1 A
48 V DC 2.0 A
1.0 A
0.5 A
0.1 A
48 VAC 2.0 A
60 VAC 2.0 A
120 VAC 5.0 A
3.0 A
2.0 A
1.0 A
0.5 A
230 VAC 5.0 A
3.0 A
2.0 A
1.0 A
0.5 A
Digital Electronic Modules
Operating
cycles (typical) cycles (typical)
NO contacts NC contacts
0.1 million 0.15 million
0.2 million 0.175 million
0.45 million 0.3 million
1.4 million 1.1 million
1.5 million 1.5 million
0.15 million 0.11 million
0.3 million 0.2 million
0.6 million 0.6 million
0.8 million 0.6 million
0.45 million 0.35 million
0.45 million 0.35 million
0.1 million 0.1 million
0.2 million 0.2 million
0.4 million 0.3 million
0.8 million 0.6 million
1.5 million 1.0 million
0.1 million 0.1 million
0.2 million 0.2 million
0.4 million 0.3 million
0.8 million 0.6 million
1.5 million 1.0 million
Operating
11-85