6
u
If the unit is connected to intrinsically safe equipment, the upper limiting values
of the unit must be observed.
u
If intrinsically safe units are connected to the intrinsically safe circuits of the
corresponding equipment, the respective upper limiting values consistent with
the explosion protection according to IEC/EN 60079-14 or IEC/EN 60079-25
must be observed (proof of intrinsic safety).
5 Electrical connection
NAMUR switch
Mechanical switch
Input circuit no.
1
2
3
1 2 3
4 5 6
1 2 3
4 5 6
1 2 3
4 5 6
10 kΩ
10 kΩ
400 Ω ≤ R ≤ 2 kΩ
1 2 3
4 5 6
Maximum permissible values of the control circuits in type of protection intrinsic
safety
Voltage
10.5 V
current
13 mA
Power
34 mW
External inductance
200 mH (IIC) / 740 mH (IIB)
External capacitance
2.4 µF (IIC) / 16.8 µF (IIB)
