Siemens Sinumerik 840D sl Function Manual page 199

Sinumerik safety integrated

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In conjunction with the safety--related control of a brake, no feedback signal is

available. The brake test will identify as to whether the actuator is correctly functio-

ning from a mechanical perspective.

High Feature

with PROFIsafe

Figure 7-4 Actuator connection via fail--safe outputs, e.g. 400 V load circuit -- P/M--switching

Example of connecting a sensor

2 safety--related inputs (to read--in through 2 channels via SGE) and 1 standard

test output (for the forced checking procedure) are required to connect a sensor in

a fail--safe fashion. The test output is fed from the power supply voltage of the

safety input module. For sensors with a self--test routine, the test output on the

input module is not required. For the 3--terminal connection concept we recom-

mend that sensors with non--equivalence contacts are used (NC contact/NO con-

tact). If a P or M short--circuit or broken cable at both signal cables, then a signal

state is obtained that is not logically permissible. This means, that a cross--circuit

fault can be detected by the non--equivalence concept without having to carry out

Cross--circuit fault detection in the input module is not required.

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition

Connecting Sensors/Actuators

7.1 Safety- -relevant input/output signals

ET 200S PROFIsafe

Electronics output -- M

Electronics output -- P

Indirect position

monitoring of the load

using positive--driven

Sinamics s120