During STEP 2 check that the
safety outputs do not close - with
manual START configuration -
simply operating both input con-
tacts, without pushing the START
pushbutton .
STEP 4
(This step must be perfor-
med first on one input contact, then
on the other one)
Release and operate the input
contacts and push the START but-
ton, so that the safety outputs
close .
Release only one input contact
(or unconnect the relative wire)
and verify that the safety outputs
open . Push the START button and
verify that the safety outputs do
not close .
Operate the released contact
again (or re-connect the relative
wire) and push the START button,
verifying that the safety outputs do
not close .
The STEPS 3 and 4 must be
repeated for each input device
connected to the input terminals .
NOTE
During all steps verify that the
auxiliary output is closed when
the safety outputs are open and
that the auxiliary output is open
when the safety outputs are clo-
sed .
USAGE PRECAUTIONS
- The safety module can check
the integrity of external contac-
tors or expansion modules sim-
ply connecting their NC control
contacts in series to the START
contact (or to the bridge, in
automatic START configuration)
between S33-S34 (NSO13DB)
or (NSO02DB) terminals .
- It is recommended to connect
a fuse in series to the safety
outputs to reduce the risk of the
safety outputs contacts welding
(see outputs technical data) .
- Never, in any situation,connect
spark quenching unit circuits in
parallel to safety outputs con-
tacts: the safety function would
no longer be guaranteed .
- Never, in any circumstance,
exceed the electrical ratings sta-
ted in the technical data table of
this manual .
INSPECTIONS AND
MAINTENANCE
The integrity of the module and
of all the connected devices must
be checked regularly according
to the risk evaluation of the plant,
under the complete responsibility
of the user . Regular inspections
must be performed repeating all
the operations listed in the TEST &
ACTIVATION section .
In particular it is necessary to per-
form regular tests on board in
order to verify that the input devi-
ces are not faulted .
In the event of a switch-off of
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