Installation and User Manual
34
CONNECTION INSTRUCTIONS
The machine I/O are designed to be operated by a single phase power supply system: Connect all the output relays
using the same power supply phase; in th
e case of 115/230 V a.c. inputs, the inputs must also be connected to the
same power supply phase as the outputs; protect the inputs using a differential circuit breaker, which may be in
common with the device used for the outputs. The energy distribution system neutral line must be connected to
earth: When using an IT type energy distribution system,
always connect via a suitable isolating transformer.
When wiring the Heavy Duty 16 A female 16 pin machine I/O connectors (supplied), proceed as follows:
1. use
shielded cables that are isolated against the selected power supply voltage (150 V a.c. or 250 V a.c.) for
all the signals, including the inputs. The cables must be protected by global type braided shielding (covering >
85%). Use wire with a cross section between 0.75 mm
2
and 2.5 mm
2
Maximum length of cable, including
switch and breaker connections: less than 30 m;
2. strip wires by 7 – 7.5 mm at either end;
3. terminate each wire using a suitably rated lug; the lugs must also guarantee the surface distances (see
below);
4. apply a tightening torque of 0.5 Nm to the screws (see Heavy Duty specification). All screws must be fully
tightened, including the unused terminals
: check that the surface distance between adjacent screws, and
adjacent lugs, is greater than 3.2. mm;
5. connect the shield (P3UP side) to the case of the Heavy Duty connector and to the chassis on the machine
side using suitable terminal blocks or metallic cable clamps. Make sure that the contact surface between the
shields and the machine chassis is ample, free from surface insulation (e.g. paint) and the connections are
kept as short as possible. It is important to guarantee the continuity of the shield even when there are
switches and circuit breakers installed along the line, making sure that the parts that require shielding in the
vicinity of the switches are kept to an absolute minimum. Make sure that the shield is connected securely to
the Heavy Duty connector case using the dedicated screw (ensure ample contact surface). Do not solder or
weld the shield to the cable clamps or directly to the connector cases.
6. the machine I/O connector must not be inserted/extracted in the presence of voltage/current.
[
N.B.
Set-up the Control trip thresholds so that multiple commands cannot be tripped simultaneously during
normal working cycles.
.
[
N.B.
+24 Vnst (“I/O TYPE A1” or “I/O TYPE A5” only)
There is a + 24 V d.c. (with respect to Ground), non-stabilised (+ 10%) short-
circuit protected voltage
present on pin 7 of connector H1 capable of supplying a max c
urrent of 20 mA. This terminal may be
used to drive external micro-
switches and/or 24 V d.c. inputs (check the specifications of the inputs
indicated above).
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