User Manual
Table Of Contents
- Contents
- Safety information
- Note Ex area
- Quick start
- Quick start with the PC
- Quick start with adjustment module MINICOM
- 1 Product description
- 1.1 Function
- 1.2 Application features
- 1.3 Adjustment
- 1.4 Antennas
- 2 Types and versions
- 2.1 Survey
- 2.2 Configuration of measuring systems
- 3 Technical data
- 3.1 Technical data
- 3.2 Approvals
- 3.3 Dimensions
- 4 Mounting and installation
- 4.1 General installation instructions
- 4.2 Measurement of liquids
- 4.3 Measurement in standpipe (surge or bypass tube)
- 4.4 False echoes
- 4.5 Common installation mistakes
- 5 Electrical connection
- 5.1 Connection and connection cable
- 5.2 Connection of the sensor
- 5.3 Connection of the external indicating instrument VEGADIS 50
- 6 Setup
- 6.1 Adjustment methods
- 6.2 Adjustment with PC
- 6.3 Adjustment with adjustment module MINICOM
- 6.4 Adjustment with HART® handheld
- 7.2 Error codes
- 7 Diagnostics
- 7.1 Simulation
VEGAPULS 42 and 44 – 4 … 20 mA 21
2
4 … 20 mA
2
2
4
-
+
Measuring system with VEGAPULS 42 or 44 via separator (Smart-Transmit-
ter) on passive PLC
• Two-wire technology (loop powered), intrinsically safe ia supply via the signal cable of the
separator for operation of the sensor in Ex zone 1 or Ex zone 0.
• Output signal sensor 4 … 20 mA passive.
Output signal separator 4 … 20 mA active.
• Optional external indicating instrument with analogue and digital display (can be mounted
up to 25 m separated from the sensor).
• Adjustment with PC, HART
®
handheld or adjustment module MINICOM (can be plugged into
the sensor or into the external indicating instrument VEGADIS 50).
Types and versions
(active)
2)
VEGA-
CONNECT 2
Separator (e.g. VEGATRENN 149 Ex see
"3.2 Approvals“)
VEGADIS 50
1)
PLC (passive)
3)
Ex area
Non Ex area
1)
If the resistance of the processing systems
connected to the 4 … 20 mA signal output is less
than 250 W, a resistor must be connected to the
connection cable during adjustment to get a loop
resistance of 250 W.
The digital adjustment signal would otherwise be
severely damped or short-circuited due to
insufficient resistance of the connected
processing system. Communication with the PC
would not be ensured.
2)
4 … 20 mA active means that the separator
delivers a level-dependent current of 4 … 20 mA
(source). The separator reacts electrically to the
PLC like a current source.
3)
4 … 20 mA passive means that the PLC consumes
a level-dependent current of 4 … 20 mA. The PLC
reacts electrically like a varying resistor
(consumer) to the PLC.
HART
®
handheld
Zone 0 or
Zone 1
EEx ia