CARLO GAVAZZI NLG02D Series, Руководство пользователя

Страница: 11 / 24

conductors separately from the
power conductors .
- Avoid installation during storms .
- Do not dispose of the packaging
in the environment .
Wiring
It is recommended to use con-
ductors with section and length
adequate to the terminals, currents
and distances involved, ensuring
that the conductors are not exces-
sively tight, that their positioning
avoids potential cuts or squashing
and that they are not in the way of
people or things .
The models named “SA” and “SC”
are equipped with fixed screw ter-
minals for direct wiring on the
module .
The modules named with “DA”
and “DC” are equipped with plug-
in terminals, that allow the wiring
on female connectors far from the
module .
Once wired-on, the female con-
nectors can be connected to the
male ones fixed on the module .
Terminals coding
The plug-in terminals of the “DA”
and “DC” models are coded so that
it is possible only one combination
to connect ALL the three female
connectors on the corresponding
male .
Power supply
Connect the A1 & A2 terminals
respectively to the positive and
negative poles of the DC power
supply source . The negative sup-
ply terminal of the ESPE must
be connected to the same nega-
tive pole of the DC power supply
source to which is connected the
A2 terminal of the NLG02D724..
safety module (see examples in
this manual) .
Input
The NLG02D724.. safety module
is designed to be driven (input
terminals S12 and S21) by two sta-
tic PNP inputs: each ESPE PNP
output transistor has the emitter
internally connected to the supply
of the ESPE, so each ESPE output
has only one wire coming from the
collector . With this configuration
the system light barrier
can reach safety category 4, PL:e
according to EN13849-1 .
The light barrier can be also driven
by only one static PNP input (see
the examples in this manual): with
this device the system module
+ light barrier can reach safe-
ty category 2, PL:e according to
EN13849-1 .
The safety module is enabled to
close the safety outputs only if both
input contacts are operated .
The connection between the ESPE
and the safety module depends on
the ESPE outputs type as listed
below:
- ESPE with two one-wire outputs
11