Application examples for conventional PSRclassic safety relays
102597_en_03 PHOENIX CONTACT 45 / 136
Function description
For additional diagnostic descriptions, please refer to Section 8.
Notes on theapplication
example
1. The cable-operated switch 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. Cable-operated switch S1
is not activated.
The cable-operated switch 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 and K4 are activated and the mirror contacts
(N/C contacts of K3 and K4) in the reset circuit are opened.
Stop Action Result Diagnostics
1. Pull cable-operated
switch 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
IN1/2
K1
K2
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
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