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Contrinex Industrial Electronics
SAFETINEX SAFETY RELAY YRB-4EML-31S
As a part of the Safetinex product line, the safety relay YRB-4EML-
31S can be used to connect YBB protective devices to the machine
control system. The relay complies with the requirements of Category 4
/ Performance Level e according to EN/ISO 13849-1. It can be used in
applications up to Category 4 / Performance Level e according to EN/
ISO 13849-1 and SIL 3 according to EN 62061. Its LED indicate the
power supply.
RESPONSE TIME FROM PROTECTIVE FIELD INTRUSION TO
SWITCHING OF SAFETY RELAY
For proper calculation of the minimum safety distance, it is essential to
understand that every element in the machine safety chain contributes
to a delay in the so-called ‘overall’ or ‘total response time’ of the safety
system.
To visualize this, please note that the figure below indicates the reac-
tion time of an AOPD wired to YRB-4EML-31S safety relay. Additional
machine control elements as well as the machine’s own stopping time
will increase the “overall” or ‘total response time’ of the safety system as
described in the chapters “MINIMUM SAFETY DISTANCE CALCULA-
TION (EU)” and “MINIMUM SAFETY DISTANCE CALCULATION (US
& CANADA)” above.
FIG. 23: BLOCK DIAGRAM
FIG. 22 : SAFETY RELAY YRB-4EML-31S
