SF4 operation equivalent, polarised / monostable safety relay with (mechanical linked) forced contacts operation.
* Forced operation contacts (2 Form A 2 Form B, 3 Form A 1 Form B) N.O. and N.C. side contacts are connected through a card so that one interacts with the other in mo.
* Signal
* Escalator
* Elevator
* Medical Instruments
* Railway
* Factory Automation
UL/CSA, TÜ.
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