Siemens SIMATIC S7-1200 System Manual page 1367

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Table of Contents

Short -circuit protection circuitry is not provided for DC outputs on CPUs, signal modules

(SMs) and signal boards (SBs).

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.

Data for selecting an actuator

Continuous thermal current

Switching capacity and life of the contacts

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK

Typical performance data

For ohmic load

For inductive load (according to

IEC 947-5-1 DC13/AC15)

A.2 General technical specifications

Current Number of operating cycles

Current Number of operating cycles

0.05 million

Technical specifications