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, K4, K8, K9, K10, and K11 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
button S1.
The emergency stop button closes enable circuit S11, S12
and S21, S22 of the safety relay.
The circuit is enabled via the reset button.
2.
Press reset button S2.
Contactors K3, K4, K8, K9, K10, and K11 are activated and
the mirror contacts (N/C contacts of K3, K4, K8, K9, K10,
K11) in the reset circuit are opened.
Once signal contacts 41 and 42 of the safety relay have been
opened, the PLC activates contactors K5, K6, and K7
depending on the user program. All three machine parts are
activated.
Stop
Action
Result
Diagnostics
1.
Press emergency stop
button S1.
The safety function is triggered and machine parts 1–3 are
deactivated.
In the reset circuit, the mirror contacts of K3, K4, K8, K9, K10,
and K11 are closed.
Power
K1
K2
Power
K1
K2
Power
K1
K2
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