4 connection examples, Sensors in non-ex area sensors in ex area, Electrical connection – VEGA VEGASTAB 690 User Manual
Page 8
8
VEGASTAB 690
Electrical connection
3.4 Connection examples
Sensors in non-Ex area
Sensors in Ex area
1
2
4
3
+
–
+
–
+
–
+
–
1
+
2
–
+
–
+
–
1
+
2
–
1
2
4
3
+
–
+
–
+
–
+
–
+
–
+
–
1
+
2
–
+
1
–
2
11
+
12
–
1
+
2
–
+
1
–
2
11
+
12
–
e.g. hydrostatic pressure
transmitters or process
pressure transmitters
e.g. differential pressure
transmitter
e.g. VEGADIS
e.g.
DCS
Load max. 500 Ohm
Load max. 500 Ohm
e.g. VEGADIS
e.g.
DCS
VEGASTAB 690
power supply unit
e.g. hydrostatic pressure
transmitters or process
pressure transmitters
e.g. differential pressure
transmitter
Meas. instrument
e.g.
DCS
Load max. 75 Ohm
Load max. 75 Ohm
Meas. instrument
e.g.
DCS
VEGASTAB 690
power supply unit
Type
145
Non-Ex area
Ex area
ia safety barrier
Non-Ex area
Ex area
ia safety barrier
Type
145
Mixed applications can also be connected to
the two outputs of the power supply unit, e.g.
- output 1, sensor in non-Ex area
- output 2, sensor in Ex area.