
12
(PNP-type or relay-type): con-
nect one output to the S12 ter-
minal and the other to the S21
terminal, leaving S11 and S22
terminals not connected (fig. 3,
4 max. Safety cat. 4, PL:e).
- ESPE with one one-wire output
(PNP-type or relay-type): con-
nect the output to the S12 ter-
minal; short-circuit the terminals
S12 with S21, leaving S11 and
S22 not connected (fig. 5, 6,
max safety cat. 2, PL:c).
- ESPE with two PNP two-wires
outputs (e.g. optocoupled
PNP-type): connect both emit-
ter outputs to the S22 terminal
and the collector outputs to the
S12 and S21 terminal, leaving
S11 not connected (fig. 7, max.
Safety cat. 4, PL:e).
- ESPE with two relay two-wires
outputs: connect one wire of
each output channel to the S22
terminal and the other outputs
to the S12 and S21 terminal,
leaving S11 not connected (fig.
8, max. Safety cat. 4, PL:e).
- ESPE with one PNP two-wires
output (e.g. optocoupled PNP-
type): connect the emitter output
to the S22 terminal and the
collector output to the S12 termi-
nal; short-circuit S12 with S21,
leaving S11 not connected (fig.
9 max. Safety cat. 2, PL:c).
- ESPE with one relay two-wires
output: connect the output wires
to the S12 and S22 terminals;
short-circuit S12 with S21, lea-
ving S11 not connected (fig. 10
max. Safety cat. 2, PL:c).
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 Circuit
The safety modules “SA” and
“DA” are set up with not-controlled
automatic/manual START. The
module can be employed connec-
ting between the X1-X2 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 employed only connecting
between the X1-X2 terminals a
NO START pushbutton (monito-
red also for welding fault). These
models cannot be configured for
automatic START.
Safety Outputs
Two NO voltage free safety outputs
are available between the 13-14
and 23-24 terminals: their contacts
are closed when the safety modu-