Application examples for conventional PSRclassic safety relays
102597_en_03
PHOENIX CONTACT
Function description
For additional diagnostic descriptions, please refer to Section 8.
Notes on theapplication
example
1.
The emergency stop control device is positive opening in accordance with EN 60947-5-1.
2.
Stop category 0 describes an immediate stop by removal of power by interrupting a
machine or drive element in accordance with EN 60204-1.
3.
Proven components and proven safety principles in accordance with EN ISO 13849-2
must be used when applying category 1.
4.
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 sep-
arately 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 AH EN SAFETY CHARACTERISTICS appli-
cation note or the SISTEMA library.
Start
Action
Result
Diagnostics
1.
Unlock emergency stop but-
ton S1.
The emergency stop button closes enable circuit S12
and S22 of the safety relay.
The circuit is enabled via the reset button.
2.
Press reset button S2.
Contactor K5 is activated.
Stop
Action
Result
Diagnostics
1.
Press emergency stop button
S1.
The safety function is triggered and contactor K5 drops
out immediately.
After the preset time, the dropout delayed enable con-
tacts of the safety relay drop out.
Power
K1/K2
K3(t) K4(t)
Power
K1/K2
K3(t) K4(t)
Power
K1/K2
K3(t) K4(t)
Power
K1/K2
K3(t) K4(t)
Summary of Contents for 2702924
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