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 position switch is positive opening in accordance with EN 60947-5-1.
2.
Contactors K5, K6, K7, and K8 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.
Stop category 1 describes a controlled stop with power available in accordance with
EN 60204-1. This means that the power is only switched off after the connected
machine has stopped.
5.
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.
Close the safety door.
The safety door circuit closes enable circuit S11, S12 and
S21, S22 of the safety relay.
Contactors K5 … K8 are activated and the mirror contacts
(N/C contacts of K5 … K8) in the reset circuit are opened.
2.
Press reset button S2.
Contactors K5 … K8 are activated and the mirror contacts
(N/C contacts of K5 … K8) in the reset circuit (Y1, Y2) are
opened.
Stop
Action
Result
Diagnostics
1.
Open the safety door.
The safety function is triggered and contactors K5 and K6
drop out immediately.
After the preset time, the dropout delayed contacts 57, 58
and 67, 68 deactivate contactors K7 and K8 with a time
delay.
In the reset circuit, the mirror contacts of K5 … K8 are
closed.
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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