6
u
Make sure the separation distances between two neighbouring intrinsically safe
circuits according to IEC/EN 60079-14 are observed.
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).
4.3 Requirements for use with equipment protection level Gc
The unit may only be installed and operated if installed in a secondary housing
that complies with the requirements according to IEC/EN 60079-0 and that has the
protection rating IP54 according to IEC/EN 60529.
When energised, non-intrinsically safe circuits may only be connected and
disconnected if there is no explosive atmosphere present.
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
17.1 mA
