Siemens SIMATIC S7 Functional Safety Manual

Technical specifications
A.1 General technical specifications
S7-1200 Functional Safety Manual
Manual, 02/2015, A5E03470344-AA
141
A.1.14
Relay electrical service life
The typical performance data estimated from sample tests is shown below. Actual
performance may vary depending upon your specific application. An external protection
circuit that is adapted to the load will enhance the service life of the contacts. N.C. contacts
have a typical service life of about one-third that of the N.O. contact under inductive and
lamp load conditions.
An external protective circuit will increase the service life of the contacts.
Table A- 8 Typical performance data
Data for selecting an actuator
Continuous thermal current
2 A max.
Switching capacity and life of the contacts
For ohmic load
Voltage
Current
Number of operating cycles (typical)
24 VDC 2.0 A 0.1 million
24 VDC
1.0 A
0.2 million
24 VDC
0.5 A
1.0 million
48 VAC
1.5 A
1.5 million
60 VAC
1.5 A
1.5 million
120 VAC
2.0 A
1.0 million
120 VAC
1.0 A
1.5 million
120 VAC
0.5 A
2.0 million
230 VAC
2.0 A
1.0 million
230 VAC
1.0 A
1.5 million
230 VAC
0.5 A
2.0 million
For inductive load (according to
IEC 947-5-1 DC13/AC15)
Voltage
Current
Number of operating cycles (typical)
24 VDC
2.0 A
0.05 million
24 VDC
1.0 A
0.1 million
24 VDC
0.5 A
0.5 million
24 VAC
1.5 A
1.0 million
48 VAC
1.5 A
1.0 million
60 VAC
1.5 A
1.0 million
120 VAC
2.0 A
0.7 million
120 VAC 1.0 A 1.0 million
120 VAC
0.5 A
1.5 million
230 VAC
2.0 A
0.7 million
230 VAC
1.0 A
1.0 million
230 VAC
0.5 A
1.5 million
Activating a digital input
Possible
Switching frequency
Mechanical
Max. 10 Hz
At ohmic load
Max. 1 Hz
At inductive load (according to IEC 947-5-1
DC13/AC15)
Max. 0.5 Hz

Siemens SIMATIC S7 Specifications

General

Brand	Siemens
Model	SIMATIC S7
Category	Controller
Language	English