VEGA VEGASON 51K…53K - Manual (Page 14)

14 VEGASON 51K … 53K
- +
4 ... 20 mA
VEGADIS
371 Ex
2
2
2
4
Measuring system with VEGASON 51K … 53K on the indicating instrument
VEGADIS 371 Ex with current and relay output
• Two-wire technology (loop powered), intrinsically safe ia-supply via the signal line from the
indicating instrument VEGADIS 371 Ex for operation of the sensor in Ex-zone 1
• Optional external indicating instrument with analogue and digital indication (can be mounted
up to 25 m away from the sensor)
• Adjustment with PC, HART ® -handheld or adjustment module MINICOM (can be plugged in
the sensor or in the external indicating instrument VEGADIS 50)
Types and versions
(passive)
VEGADIS 50
0/4 … 20 mA
Relay
(see "3.2 Approvals“)
1 )
Ex-area Not Ex-area
HART ® -handheld
VEGA-
CONNECT 2
1) If the resistors of the processing systems
connected to the 4 … 20 mA-signal output are less
than 200
Ω
, a resistor of 250
Ω
to 350
Ω
must be
connected to the connection line during adjust-
ment.
The digital adjustment signal would be extremely
damped or short-circuited via too small input
resistors of the connected processing system
which means that the digital communication with
the PC could no longer be ensured.