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.
Contactors K3 and K4 have mirror contacts in accordance with EN 60947-4-1.
3.
Stop category 0 describes an immediate stop by removal of power by interrupting a
machine or drive element in accordance with EN 60204-1.
4.
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 S11,
S12, and S22 of the safety relay.
The circuit is enabled via the reset button.
2.
Press reset button S2.
Contactors K3 and K4 are activated and the mirror con-
tacts (N/C contacts of K3 and K4) in the reset circuit are
opened.
Stop
Action
Result
Diagnostics
1.
Press emergency stop button
S1.
The safety function is triggered and contactors K3 and
K4 drop out.
In the reset circuit, the mirror contacts of K3 and K4 are
closed.
Power
K1
K2
Power
K1
K2
Power
K1
K2
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