Installation and User Manual
40
with a power supply at the minimum level
stipulated by the Standard EN61131, a PTC
type 450 Ohm fuse and maximum load
conditions, the resulting output voltage may be
as low as: 19.2V – 3V – 450 Ohm ×10
mA=11.7V, which would not be sufficient to
drive the corresponding machine inout to the
high logic state.
CONNECTION INSTRUCTIONS
When wiring the Heavy Duty 16 A female 16 pin machine I/O connectors (supplied), proceed as follows:
1. use wire with a cross section of 0.75 to 2.5 mm
2
,
2. strip wires by 7 – 7.5 mm at either end;
3. terminate each with cable lugs;
4. apply a tightening torque of 0.5 Nm to the screws;
5. in the case of I/O cables that exceed 30 m in length it is necessary to use shielded cable. Use a globally
shielded cable with the braid connected to the case of the Heavy Duty connector (P3UP connection) and to
the machine chassis at the other end by means of suitable terminal block or metallic cable clamp. 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.
WARNING
The machine I/O must be supplied by a SELV (Safety Extra Low Voltage) power source, as defined in the
Standard EN60950-1.
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