
21
5 Connecting to power supply
VEGABAR 29 • Two-wire 4 … 20 mA
57087-EN-210301
1
2
3
+
-
1
Fig. 19: Wiring plan - two-wire 4 … 20 mA - plug according to ISO 4400
1 Voltage supply and signal output
Contact, plug connector
Function/Polarity
1
Voltage supply, signal
2
Voltage supply, signal output/-
3
Free
Electrically connected with metal housing
2
1
Fig. 20: Wiring plan - Two-wire 4 … 20 mA - direct cable outlet
1 Voltage supply, signal output
2 Ventilation
Wire colour
Function/Polarity
Brown
Voltage supply, signal output/Plus
Blue
Voltage supply, signal output/Minus
5.4 Switch-on phase
After switching on, the device first carries out a self-check:
•
Internal check of the electronics
•
The output signal jumps to the set fault current
The current measured value is then output on the signal cable.
Plug according to
ISO 4400
Direct cable outlet