ifm electronic’s new zero-speed safety
relay has been tested by TuvNord for
use in applications up to and
including Performance Le vel PL e
according to ISO 13849-1, Safety
Interity Level (SIL) 3 according to IEC
61508 and SILClaim Limit 3
according to EN 62061 .

Equipped with two volt-free safety
relay outputs, the housing of the new
DA101S is 25mm wide, has solidstate
PNP feedback
output and LED
indicators to verify
the status of the
inputs and outputs.

Two overlapping
input signals are
c ompared and
evaluated, ideally from inductive
s ensors. These take their power
directly from the zero-speed relay.

As true zero motion is dif ficult to
verify, the DA101S is set by the user
to detect a low f requency, and switch
when the detected pulse rate drops
below the pre-set.