CARLO GAVAZZI NLG13D724 Series, User Manual, Page: 12 / 24

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nal and the other to the S22 ter-
minal, leaving S12 and S21 ter-
minals not connected (fig. 3, 4
max. Safety cat. 4).
- ESPE with one one-wire output
(PNP-type or relay-type) : con-
nect the output to the S11 termi-
nal; short-circuit the terminals
S11 with S22, leaving S12 and
S21 not connected (fig. 5, 6,
max safety cat. 2).
- ESPE with two PNP two-wires
outputs (e.g. optocoupled PNP-
type) : connect both emitter out-
puts to the S21 terminal and the
collector outputs to the S11 and
S22 terminal, leaving S12 not
connected (fig. 7, max. Safety
cat. 4).
- ESPE with two relay two-wires
outputs : connect one wire of
each output channel to the S21
terminal and the other outputs to
the S11 and S22 terminal, lea-
ving S12 not connected (fig. 8,
max. Safety cat. 4).
- ESPE with one PNP two-wires
output (e.g. optocoupled PNP-
type) : connect the emitter output
to the S21 terminal and the col-
lector output to the S11 terminal;
short-circuit S11 with S22, lea-
ving S12 not connected (fig. 9
max. Safety cat. 2).
- ESPE with one relay two-wires
output: connect the output wires
to the S11 and S22 terminals;
short-circuit S11 with S22, lea-
ving S12 not connected (fig. 10
max. Safety cat. 2).
For safety cat. 2 applications, a
periodic test (interrupting the
ESPE light beam) must be carried
out. The test periodicity is defined
in the relevant standards.
The safety relay is enabled to
close the safety outputs only if both
input switches are operated.
START C
IRCUIT
The safety modules “SA” and “DA”
are set up with not-controlled auto-
matic/manual START. The module
can be employed connecting bet-
ween the S33-S34 terminals either
a NO START pushbutton (for not
monitored manual START) or a
short-circuit (for automatic
START).
The safety modules “SC” and “DC”
are set up with monitored manual
START. The module can be emplo-
yed only connecting between the
S33-S34 terminals a NO START
pushbutton (monitored also for
welding fault). These models can-
not be configured for automatic
START.
S
AFETY
O
UTPUTS
Three NO voltage free safety out-
puts are available between the 13-
14, 23-24 and 33-34 terminals:
their contacts are closed when the
safety module is correctly powe-
red, the input switches are opera-