
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 and K6 have mirror contacts in accordance with EN 60947-4-1.
3.
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.
4.
A restart should only occur automatically if there is no hazardous situation. Please refer
to the detailed information in standard EN ISO 12100, Section 6.3.3.2.5.
5.
The (holding) brake is not part of the safety function.
6.
When the safety door has been opened, it should not be possible to access the danger
zones (observe safety distance) during the controlled stop (of the hazardous move-
ment).
7.
Install the safety relay and contactors together in an installation space in accordance
with EN 60204-1 (e.g., in the control cabinet). This prevents a cross-circuit at the output
of the safety relay.
8.
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.
9.
Make sure that the frequency converter and the safety relay have the same ground
potential.
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 and K6 are activated and the mirror contacts
(N/C contacts of K5 and K6) in the reset circuit are opened.
Stop
Action
Result
Diagnostics
1.
Open the safety door.
The safety door is opened and contacts 13, 14 of the safety
relay open immediately, which initiates an automatic “quick
stop” at the FI.
After the preset time, the dropout delayed contacts 37, 38
and 47, 48 deactivate contactors K5 and K6 with a time
delay.
After the delayed deactivation, the mains supply to the motor
is disconnected from the FI and at the same time brake
unlocking is switched off so that the brake blocks the drive.
In the reset circuit, the mirror contacts of K5 and K6 are
closed.
Power
K1/K2
K3(t) K4(t)
Power
K1/K2
K3(t) K4(t)
Power
K1/K2
K3(t) K4(t)
Содержание 2702924
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