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 K5, K6, and K7 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.
The brake is not part of the safety function.
5.
Install the safety relay, FI, and contactors together in an installation space in accor-
dance with EN 60204-1 (e.g., in the control cabinet). This prevents a cross-circuit at the
output of the safety relay.
6.
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.
7.
Make sure that the frequency converter and the safety relay have the same ground
potential.
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 K5 … K7 are activated and the mirror contacts
(N/C contacts of K5 … K7) in the reset circuit are opened.
Stop
Action
Result
Diagnostics
1.
Press emergency stop
button S1.
The safety function is triggered 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 the three contactors K5 … K7 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 … K7 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)
Содержание 2702924
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