NORSTAT Safety Relays - Handbuch (Seite 93)

application guide safety relays from riese electronic page
89
immediately, the contacts 13-14 and 23-24 are opened. The auxiliary output
S31 becomes inactive.
A reset can not be effected until both safety gate switches are opened
simultaneously.
General information:
For this operation mode the terminals S35/S36
must be bridged. For the safety
gate function the simultaneity* of the channels is infinite. The two channels
must not have different signals when the supply-voltage is switched on. That
means both contacts of the safety gate switch have to be opened or closed.
In case of a faulty input-wiring, the device will switch to the FAIL-SAFE
mode (safety-switch-off).
Category: 4 , PL e, SIL 3 reachable
S32 S33 S22 S12 S11 S21 S34
A1
Kext
S35 S36 A2
+24V DC 0V DC
Two-hand application
If the push buttons S1 and S2 are pressed simultaneously, the
outputs 13-14, 23-24 are closed and output S31 is turned on.
After releasing one or both push buttons the outputs 13-14 and 23-24 are
opened and the output S31 is turned off. Only after releasing both push buttons
a new cycle can be started.
By asynchronous actuation (t>0,5s) the outputs are not released. The outputs
13-14 and 23-24 remain opened, output S31 remains turned off.
General information
For this operation mode the terminals S35/S36
must be bridged. The time
between pressing both switches is limited to max. 0,5s. After exceeding this
time a new cycle can only be started after releasing both push buttons. In the
moment of turning on the supply voltage the push buttons must not be
actuated.
In case of a faulty input-wiring, the device will switch to the FAIL-
SAFE mode (safety-switch-off).
For type 3c, Ple, SIL 3 reachable
S32 S33 S22 S12 S11 S21 S34
A1
Kext
S35 S36 A2
+24V DC 0V DC
S36
S1 S2
Dual channel application for connecting OSSD contacts (pnp) of
an ESPE with automatic start and supply of the ESPE by the SAFE
FLEX.
OSSD1 and OSSD2 have to be connected to the input circuits (S11/S12 and
S21/S22). The bridge (or the feedback control loop) S32/S33
switches the
device into the automatic start mode. The activation of the outputs
results from the activation of the outputs of the ESPE (OSSDs outputs have
high-signal). When the optical way of the light barrier is interrupted the OSSD
outputs of the ESPE turn off (low signal) and the safety outputs of the SAFE
FLEX fall off into the initial state. The contacts 13-14 and 23-24 are opened.
The auxiliary output S31 is inactive.
The power supply of the light barrier/ light curtain is provided by the SAFE
FLEX (negative pole to S36, positive pole to S21, I
max
= 50mA)
General information:
For this operation mode the terminals S35/S36 must not be bridged. The
simultaneity is defined by the high signals at the inputs S12 and S22. The
high-signal at the input S22 may be activated maximally 0,5s after the high-
signal at the input S12. A High-signal at the entrance S12 can be activated as
desired after the High-signal at S22. After exceeding the simultaneity a new
cycle can only be started after deactivating the OSSDs. The safety inputs
S32 S33 S22 S12
S11
S21 S34
A1
Kext
S35
S36
A2
+24V DC 0V DC
L+ OSSD1 OSSD2 L-
BWS / ESPE
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