Configuration / operation
10.2 Explanation of the device's functions
3SK1 safety relays
Manual, 04/2013, A5E02526190021A/RS-AA/01
181
Function of the cascading input (terminal INK)
1.
Safe combination of safety relays
In this application, a higher-level safety relay switches off the 3SK1 safety relay via the
cascading input via a safe output.
Example:
an EMERGENCY STOP circuit is to deactivate the entire installation as a higher-level
circuit.
Several function groups (e.g., protective doors) that disconnect locally can be operated
as subordinate units.
WARNING
Application / safety relay safety level
The safety level (PL/SIL) of the application corresponds to the lowest safety level of a
subsystem of the application when errors are excluded (protected wiring of the control
cable).
2.
Additional safety sensor circuit
The cascading input INK is ANDed with sensor inputs IN1, IN2 .
PL c in accordance with ISO 13849-1, or SIL1 in accordance with IEC 62061 can be
achieved if the cascading input is wired with single-channel (positive opening) safety
sensors (supply via A1 / +24 V (identical potential to A1)) and if the connecting cable is
laid in a protected fashion. The start function for the cascading input INK corresponds to
the start response of sensor inputs IN1 and IN2 (autostart or monitored start).
The cascading input INK can be triggered with floating or solid-state contact blocks
(switching to P potential). Floating contact blocks must be connected between A1 / +24 V
(identical potential to A1) and the cascading input.
3.
Normal switching duty
The cascading input INK can also be used for normal switching duty (not safe). The
cascading input INK can be activated in this case with floating contact blocks or with
solid-state contact blocks (switching to P potential).
Floating contact blocks can be connected between A1 / +24 V and INK .
It is important to note that the start function of cascading input INK corresponds to the
start function of sensor inputsIN1, IN2 .
Содержание SIRIUS 3SK1
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Страница 10: ...Table of contents 3SK1 safety relays 10 Manual 04 2013 A5E02526190021A RS AA 01 ...
Страница 14: ...Introduction 1 6 Correction sheet 3SK1 safety relays 14 Manual 04 2013 A5E02526190021A RS AA 01 ...
Страница 28: ...Product overview for 3SK1 3 5 3SK1 system 3SK1 safety relays 28 Manual 04 2013 A5E02526190021A RS AA 01 ...
Страница 94: ...3SK1 devices 5 4 3SK1 input expansions 3SK1 safety relays 94 Manual 04 2013 A5E02526190021A RS AA 01 ...
Страница 102: ...System configuration 6 3 System configuration rules 3SK1 safety relays 102 Manual 04 2013 A5E02526190021A RS AA 01 ...
Страница 186: ...Commissioning 3SK1 safety relays 186 Manual 04 2013 A5E02526190021A RS AA 01 ...
Страница 192: ...Display and diagnostics 12 4 Diagnostics 3SK1 safety relays 192 Manual 04 2013 A5E02526190021A RS AA 01 ...
Страница 242: ...Technical data 13 3 Expansion modules 3SK1 safety relays 242 Manual 04 2013 A5E02526190021A RS AA 01 ...
Страница 258: ...Accessories 3SK1 safety relays 258 Manual 04 2013 A5E02526190021A RS AA 01 ...
Страница 260: ...Appendix A 1 Correction sheet 3SK1 safety relays 260 Manual 04 2013 A5E02526190021A RS AA 01 ...
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