Electrical connection – VEGA VEGASEL 643 User Manual
Page 9
VEGASEL 643
9
Electrical connection
Extension example 1
Instrument 1: VEGASEL 643 actively switched
Instrument 2 up to max. instrument 5: VEGASEL 643 passively switched
Note:
The voltage inputs (7, 8) must not be used when the current inputs are switched.
Extension example 2
Instrument 1: VEGAMET 601 or 602 Ex
Instrument 2 up to max. instrument 10: VEGASEL 643 each switched to passive voltage input (parallel switching)
Note:
Current inputs (3, 4) must not be used when the voltage inputs are switched.
According to the extension examples it is possible to control several signal conditioning instruments with one
sensor and hence to detect different levels.
This kind of switching can be extended each up to 5 or 10 instruments.
1
2
4
3
+
–
1
2
1
2
VEGASEL
4
3
4
3
VEGASEL
VEGASEL
+
–
+
–
+
–
+
–
+
–
1
2
+
–
1
2
1
2
VEGAMET
4
3
4
3
VEGASEL
VEGASEL
8
7
8
7
8
7
+
–
+
–
+
–
10 V
10 V
10 V
+
–
+
–
+
–
+
–
4
3
+
–
Sensor (4 … 20 mA)
Instrument 1
Instrument 2 .................... up to max. . instrument 5
Sensor
Instrument 1
Instrument 2 .................... up to max. . instrument 10
active
passive
passive
Current
inputs
Current
inputs
Current
inputs
Voltage input
Voltage input
Voltage input