Bosch REXROTH IndraControl VEH 30.2, Руководство по планированию проекта

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A channel of the enabling button is connected to the terminals S11 and S12,
the other channel to the terminals S21 and S22. Both circuits are monitored
to avoid cross-circuits.
The SCR
1) compares both channels during operation. Only if the contacts of
both channels are closed, also the N/O contacts of the SCR (13/14, 23/24,
33/34 ) are closed. If one of the two input contacts should be short-circuited
because of an error, the outputs are nevertheless switched off when opening
the input contacts. As the undamaged input channel still introduces the
switch off. When activating the enabling device the next time, the outputs re‐
main open because the SCR has recognized the different input signals as
error.
The output circuits 13/14 and 23/24 are switched in the SCR via forced-gui‐
ded safety relays (in the example 33/34 and 41/42 can remain free). They
serve to trigger the two redundant power contactors K3 and K4.
Path S33, S34 serves for the start enabling of the SCR (here: automatic start)
and is used for rereading the auxiliary contacts of the power contactors. If a
switched on contactor is blocked, the next cycle in the SCR cannot be started
anymore.
The suggested installation scheme only serves as example. Do observe the
documentation of the used components.
Performance Level according to
EN ISO 13489-1
Connection example of the enabling button: Overview
At the IndraControl VEH 30.2 devices, the enabling devices al‐
ways feature 2 circuits.
To meet the safety category 3 PL d in accordance with EN ISO 13849-1, the
enabling button must be realized with 2 circuits and these circuits have to be
monitored on short circuits.
The safety category 3 PL d means, that 1 failure must not lead to the loss of
the safety function, and whenever possible, the single failure is detected. The
connection example in "Category 3/4 (EN 954-1)" on page 73 shows how the
safety category 3 PL d can be fulfilled by the enabling device up to the output
terminal K4 within the connection module. Observe that the entire concept of
the machine must be laid out according to the above mentioned principles.
Risk due to non-detection of a malfunction of
the enabling device due to an invalid parame‐
ter selection for the monitoring of simultanei‐
ty.
WARNING
Always enable the monitoring of simultaneity for both channels of the ena‐
bling device at the VEH30.2 in the safety monitoring device. Select a valid
time parameters that should not be larger than 0.5 seconds. Take the Per‐
formance Level of the safety function (according to DIN EN ISO 13849-1) and
the risk assessment (DIN EN ISO 12100) of the system into consideration
when selecting the parameters for the monitoring of simultaneity.
The monitoring of the simultaneity by the monitoring device is necessary.
Otherwise maybe a failure culmination would not be recognized and this
would cause the safety loss:
1)
Safety relay
Bosch Rexroth AG DOK-SUPPL*-VEH*30.2***-PR03-EN-P
Rexroth IndraControl VEH 30.2 Hand-Held Terminal
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Pin Assignments of the IndraControl VEH 30.2