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Sentridge Products  >  Siemens Safety Relays
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Siemens Safety relays

3TK28/3RA71 Safety Relays

3TK28/3RA71 Safety Relays
Safety relays are used whenever safe and reliable shutdown is required in dangerous situations.
SIRIUS safety relays are essential elements in our system-wide, cost-efficient safety chain. Whether EMERGENCY STOP shutdown, protective door monitoring or optimum protection of presses or punching machines – our comprehensive program ranges from economic standard devices to innovative, highly- flexible multifunctional units to cover virtually all applications.

3TK2845 Multi-Function Devices 3TK2845 Multi-Function Devices
3TK2845 Multi-Function Devices
Several Devices with Different Functions
Where previously up to four individual devices had to be applied for a safety application, it can now be realized with a single multi-function device, because the devices combine multiple functions in a single enclosure.
Two sensor inputs, e.g. for EMERGENCY STOP and protective door, keyswitch-operated safety logic as well as two electronic and two relay enable circuits make it possible.
There are 5 versions of Multi-Function Devices available

Monitored and automatic start-up

Monitored start-up

Enabling button

Spring force interlocked tumbler

Magnetic force interlocked tumbler
The advantages at a glance

Lower storage space

Space and cost saving because of multi-functionality
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