Wiring
Operating Manual PSEN sg2c
1003267EN02
20
5.2
Recommended cable cross sections
The values in the table are valid for a series connection with max. 3 sensors and a voltage
for solenoid operation of 24 V. The solenoid current is 1.5 A per solenoid.
For differing values the conductor cross section must be calculated.
Total cable run [m]
1 safety switches
2 safety switches
3 safety switches
5
0.25 mm
2
, AWG24
0.25 mm
2
, AWG24
0.5 mm
2
, AWG21
10
0.25 mm
2
, AWG24
0.25 mm
2
, AWG24
0.5 mm
2
, AWG21
15
0.25 mm
2
, AWG24
0.25 mm
2
, AWG24
0.5 mm
2
, AWG21
20
0.25 mm
2
, AWG24
0.5 mm
2
, AWG21
x
25
0.25 mm
2
, AWG24
0.5 mm
2
, AWG21
x
30
0.25 mm
2
, AWG24
x
x
40
0.5 mm
2
, AWG21
x
x
50
0.5 mm
2
, AWG21
x
x
60
0.5 mm
2
, AWG21
x
x
70
x
x
x
Cable runs marked with an x are not recommended.
For operating several safety switches with greater cable runs, the cables for solenoid oper
ation (terminals X16 and X17) have to be carried individually, or several cables have to be
used. If more than three safety switches are connected in series or cable runs over 60 m
are required, please contact Pilz.
The permitted conductor cross section is at least 0.25 mm². To have a higher conductor
cross section, two cable cores can be inserted into a terminal. This adds together the con
ductor cross sections and halves the cable resistances. In this case, use a terminal lug! The
signals important for cable resistance are:
}
24 V (X11 or X21)
}
0 V (X12 or X22)
}
the two solenoid operation signals (X16 and X17 or X26 and X27).
5.3
General wiring guidelines
Please note:
}
All metallic surfaces on the safety switch are connected to 0 V via a resistor (100
kOhm) for functional earthing.
}
UL requirements:
–
Use copper wiring with a temperature stability of 75 *.
–
Use an LVLC supply (LVLC: limited voltage, limited current).
–
Use multicore cable with a cable diameter of 6 ... 10 mm.
}
The permitted conductor cross section for the connectors is 0.25 1.0 mm², 23 17
AWG.