16
wires output: one ESPE output
wire is connected to S22, while the
other is connected to S12 and S12
is short-circuited with S21 .
The category of the application can
reach up to category 2 according
to the EN13849-1 standards .
As the input switches, connected
to the S12 and S21 inputs are ope-
rated, the safety module is ena-
bled to close the safety outputs, in
manual START set-up, or closes
the safety outputs, in automatic
START set-up .
NOTE
To reach the safety category
4 the ESPE must be compliant
with the requirements of safe-
ty category 4 according to EN
13849-1 with self-monitoring for
the event of short-circuit between
its outputs: in the event of short-
circuit between the ESPE safety
outputs the ESPE must switch off
the safety outputs .
NOTE
The ESPE + NLG02D724 modu-
le system is part of the safe-
ty devices of the machine . For
safety category 2 applications
employing ESPEs with only one
output, the integrity and correct
behaviour of the system must be
monitored by the overall safety
system in which the ESPE and
the module are used (e .g . the
machine in which the ESPE is
installed or a safety supervisor) .
To reach safety category 2 the
safety system must be checked
and monitored regularly . Self-
checking functions of the ESPE,
manual tests and regular main-
tenance activities (see chapter 7)
must be performed by the user
with a frequency suited for the
risk of the application . The check
must be performed according to
the “TEST AND ACTIVATION”
chapter of this manual and accor-
ding to the checking procedu-
res of the ESPE user’s manual,
simulating on board the normal
working cycle of the ESPE, inter-
rupting the ESPE beams and
verifying that the ESPE and the
module work correctly .
