Application manual for YRB-4EML-31S safety relay
Contrinex AG Industrial Electronics
24
Function description
Start
Action
Result
Diagnostics
1. Unlock emergency stop
button S1.
The emergency stop button closes enable circuit S11
and S12 of the safety relay.
The circuit is enabled via the reset button.
Power
K1
K2
2. Press reset button S2.
Contactor K3 is activated.
Power
K1
K2
Stop
Action
Result
Diagnostics
1. Press emergency stop
button S1.
The safety function is triggered and contactor K3 is
opened.
Power
K1
K2
Notes on the application
example
1. The emergency stop control device is positive opening according to EN 60947-5-1.
2. Stop category 0 describes an immediate stop by removal of power by interrupting a
machine or drive element according to EN 60204.
3. Proven components and proven safety principles according to EN ISO 13849-2 must
be used when applying category 1.
4. The occurrence of a fault can lead to the loss of the safety function.
5. The connecting cables for the emergency stop control device should either be laid
separately or protected against mechanical damage.
6. When using the safety relay, take into consideration the maximum permissible number
of cycles for observing the SIL/PL safety characteristics in the specific application. The
safety characteristics can be found in the FUNCTIONAL SAFETY
CHARACTERISTICS data sheet or the SISTEMA library.
