Vega POINTRAC 31 Operating Instructions Manual page 20

5 Connecting to power supply
Electronics and connec-
tion compartment - In-
struments with intrinsi-
cally safe current output
Adjustment and connec-
tion compartment - In-
struments with intrinsi-
cally safe current output
20
Instruments with intrinsically safe current output
You can find detailed information on the explosion-protected versions
(Ex-ia, Ex-d) in the Ex-specific safety instructions. These safety
instructions are part of the scope of delivery and come with the Ex-
approved instruments.
/L
1
/N
PE
2
Fig. 10: Electronics and connection compartment (Ex-d) with instruments with
intrinsically safe current output
1 Voltage supply
2 Relay output
3 Signal input 4 ... 20 mA
4 Switching input for NPN transistor
5 Switching input floating
6 Transistor output
7 Interface for sensor-sensor communication (MGC)
8 Setting the bus address for sensor-sensor communication (MGC)
1
Fig. 11: Adjustment and connection compartment (Ex-ia) with instruments with
intrinsically safe current output
1 Terminals for intrinsically safe signal output 8/16 mA/HART (Multidrop) ac-
tive (not with versions with Ex-d approval)
2 Contact pins for the display and adjustment module or interface adapter
3 Terminals for the external display and adjustment unit
4 Ground terminal
MGC = Multi Gauge Communication
2)
+
1
2 5 6 7 8
( ) (-)
POINTRAC 31 • 8/16 mA/HART - four-wire
8
7
6
4
5
3
2)
2
3
4