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Entry type: Product note Entry ID: 109760432, Entry date: 09/14/2018

Reduction of switching times 3RM1 for fail-safe versions 24 V DC

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Thanks to continuous optimization of the 3RM1 hybrid motor starters, the switching times for the 24 V DC fail-safe versions have been shortened. This means that improved operation of time-critical applications is now possible.

Product description

The 3RM1 hybrid failsafe motor starters in 24 V DC version have been further optimized and are delivered with a reduced on and off delay  as of 3 September 2018.

The failsafe motor starters 3RM11..-.A04 and 3RM13..-.A04 with product versions prior to E04 previously had the following switching times:

ON delay time

90 ... 120 ms

OFF delay time

40 ... 55 ms


The optimized new versions with product version as of and including E04 now have the following switching times:

ON delay time

65 ... 76 ms

OFF delay time

30 ... 43 ms


The pause time was also adapted and is now only 150 ms instead of 200 ms.

A pause time of > 500 ms must be ensured on the application side for operating voltages > 440 V in the main circuit.


You can find more details  in the SIRIUS 3RM1 Motor Starter Manual

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