PNOZ s3
Operating Manual PNOZ s3
21395-EN-12
14
Start circuit/feedback loop
Without feedback loop monit-
oring with feedback loop monitoring
Automatic start
K5
K6
K5
L1
N
K6
S12
13 (23)
S34
14 (24)
Monitored, manual start/restart
K5
K6
K5
L1
K6
S12
S34
S3
N
13 (23)
14 (24)
NOTICE
In the event of an automatic start or manual start with bridged start
contact (fault):
The unit starts up automatically when the safeguard is reset, e.g. when the
E-STOP pushbutton is released. Use external circuit measures to prevent
an unexpected restart.
Semiconductor output
*Connect together the 0V connections on all the external power supplies
Operation
When the relay outputs are switched on, the mechanical contact on the relay cannot be
tested automatically. Depending on the operational environment, measures to detect the
non-opening of switching elements may be required under some circumstances.
When the product is used in accordance with the European Machinery Directive, a check
must be carried out to ensure that the safety contacts on the relay outputs open correctly.
Open the safety contacts (switch off output) and start the device again, so that the internal
diagnostics can check that the safety contacts open correctly
} for SIL CL 3/PL e at least 1x per month
} for SIL CL 2/PL d at least 1x per year
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