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Brand: VEGA
VEGA VEGATRENN 141 Ex Separator for 4-20 mA HART Sensors
Description
An intrinsically safe isolator that passes HART through untouched
The VEGATRENN 141 is a single-channel Ex separator used for galvanic separation, intrinsically safe power supply and signal transmission of Ex-approved 4…20 mA/HART sensors in hazardous areas. VEGA says it is a universal Ex separator for all 4…20 mA/HART sensors and is used in all industries. The sensor current is transferred linearly and galvanically separated to an active 4…20 mA/HART output, with bidirectional HART transmission: the HART signal can be tapped via front-mounted communication sockets or the terminals, which allows unrestricted access to the sensor settings from the safe area.
Technical specifications
| Parameter | Specification |
|---|---|
| Type | VEGATRENN 141, Ex separator for 4…20 mA/HART sensors |
| Series | Module unit for carrier-rail mounting, 35 x 7.5 mm rail acc. to EN 50022/60715, detachable coded terminals |
| Operating voltage | 24…230 V AC (-15 %, +10 %), 50/60 Hz; 24…65 V DC |
| Max. power consumption | 3 W (15 VA) |
| Sensors | 1 x 4…20 mA/HART |
| Input | Active (sensor supplied by the separator) |
| Terminal voltage | 21…16.5 V DC at 4…20 mA; off-load 24 V DC (± 1 V) |
| Short-circuit current / ripple | < 26 mA / < 50 mV RMS |
| Output | 1 x 4…20 mA/HART, active; off-load voltage < 15.5 V DC |
| Output residual ripple | < 50 µA RMS |
| HART access | Front-mounted HART communication sockets and terminals |
| Ambient temperature | -20…+60 °C at the installation site (Ex area optional) |
| Protection, protection class | IP20; protection class II; pollution degree 2 |
What an Ex separator does
The separator limits the energy that can pass into the hazardous area, so a sensor in an explosive atmosphere stays intrinsically safe, while a galvanic barrier isolates the sensor loop from the control-room loop and removes ground loops. The VEGATRENN 141 supplies the sensor from the module itself, delivering an off-load voltage of 24 V DC with a short-circuit current under 26 mA, and passes the measured value on through an active output so a PLC input receives a standard 4…20 mA signal.
HART handling and ordering
The front sockets let a technician plug a HART handheld in without opening the cabinet. A second output version with a looped HART resistor is shown on the wiring plan. The VEGATRENN works with VEGA radar, guided wave, pressure and level sensors and with third-party HART transmitters, but the intrinsically safe parameters must match the sensor certificate, so state the sensor, the Ex zone and the approval marking in your RFQ and confirm them against VEGA’s documents.
An isolating repeater is typically chosen where a signal passes between different earth potentials or into a safety-relevant system, since the galvanic separation keeps faults on one side from reaching the other. Give the signal range, supply, channel count and any hazardous-area requirement in your enquiry, and confirm the approvals printed on the specification sheet with the manufacturer before ordering for an Ex loop.
Related VEGA products: VEGA VEGAMET 841 Field Level Controller, VEGA VEGATOR 141 Level Controller for 4-20 mA Sensors and VEGA VEGATOR 121 Controller for 8/16 mA Vibrating Switches.
Documents and quotation
The official VEGA VEGATRENN 141 specification sheet (52241-EN, version 220429) is attached to this page for download and covers the technical data, dimensions and wiring summarised above.
Share the application details with our sales desk in Muscat and we will match them to the right variant and prepare a quote. Seven Star LLC supplies these instruments as an independent company, not as the manufacturer’s agent; see our level instrumentation category for related products. Please confirm approvals, cable length and fitting against the manufacturer’s data before ordering.
Datasheets & Documents
- Datasheet VEGA VEGATRENN 141 Specification Sheet (52241-EN) Download
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About brand
VEGA is a German maker of level and pressure instruments. Bruno Grieshaber founded the company in 1959 in Triberg in the Black Forest, and it has been based in Schiltach since 1975, still family owned as VEGA Grieshaber KG. VEGA is best known for radar level sensors: it introduced the first two-wire radar level sensor in 1997 and the first 80 GHz radar sensor for bulk solids, the VEGAPULS 69, in 2015.
Seven Star LLC is an independent supplier listing VEGA radar and guided wave radar transmitters, point level switches, pressure transmitters and signal conditioning instruments for buyers in Oman and the GCC. Sensors are matched from the product code on the type label.
VEGA at a glance
| Origin | Founded by Bruno Grieshaber in 1959 in Triberg, Germany |
|---|---|
| Headquarters | Schiltach, Black Forest, Germany (since 1975) |
| Ownership | Family-owned company: VEGA Grieshaber KG |
| Milestones | First two-wire radar level sensor (1997), first 80 GHz radar for bulk solids, VEGAPULS 69 (2015), VEGAPULS 6X single radar platform for liquids and solids |
| Product families | VEGAPULS radar, VEGAFLEX guided wave radar, VEGASWING and VEGAPOINT switches, VEGACAL capacitive probes, VEGABAR and VEGADIF pressure, VEGAMET and VEGADIS signal conditioning |
VEGA sensor and instrument series
| Series | Type | Typical use |
|---|---|---|
| VEGAPULS 6X, VEGAPULS 69, VEGAPULS 64 | Process radar level transmitters (80 GHz) | Storage and process tanks, reactors with agitators, silos and bulk solids |
| VEGAPULS 11, 21, 31, 42 | Compact radar sensors | Water and wastewater, simple storage tanks; VEGAPULS 42 with IO-Link for machine integration |
| VEGAPULS C 21, C 11, C 22, C 23 | Radar sensors with fixed cable, IP68 | Wet wells, pumping stations, open channels and river levels |
| VEGAFLEX 81, 82, 83, 86 | Guided wave radar (TDR) | Level and interface in liquids, bulk solids, hygienic and high-temperature or high-pressure service (VEGAFLEX 86) |
| VEGASWING 61, 63, VEGAPOINT 21 | Vibrating and capacitive point level switches | Overfill protection, dry-run protection and high or low level alarms |
| VEGACAL 62 to VEGACAL 67 | Capacitive rod and cable probes | Point and continuous level in solids and conductive or adhesive liquids |
| VEGABAR 82, 83, 28, 29, 38 | Pressure transmitters, ceramic or metallic cell | Process pressure and hydrostatic level; compact 18/19 and 28/29/38 versions for utilities |
| VEGADIF 85 | Differential pressure transmitter | DP flow, filter monitoring and level in pressurised vessels |
| VEGAMET 841, VEGADIS 176 | Controller and loop display | Level display, pump control and remote indication of 4-20 mA signals |
Where VEGA instruments are used
VEGA radar sensors measure level in crude oil and product tanks, separators, chemical reactors, cement and aggregate silos, grain stores and water reservoirs. Compact cable radars are widely used in wastewater pumping stations and flood monitoring. Because 80 GHz radar focuses a narrow beam, it can measure past internal structures in a tank, and it is not affected by the temperature, pressure or vapour above the product, which suits hot Gulf storage tanks.
Ordering VEGA instruments: what we need
The product code on the type label (for example PS64.XXXXXXX) fixes the measuring range, antenna or probe, process connection, electronics and approvals. Send it with the serial number. For a new measurement add the medium and its dielectric constant if known, tank or silo height and internals, process pressure and temperature, process connection, output (4-20 mA HART, PROFIBUS PA, Modbus or IO-Link), and any hazardous-area or overfill protection approval required.
Facts checked against VEGA company and product information, October 2026.
Browse VEGA products by category: Level Transmitter, Pressure Instrumentation, Controllers and Data Acquisition.
FAQ
Questions about the VEGA VEGATRENN 141 Ex Separator for 4-20 mA HART
Answers from our engineering team on installation, compatibility and integration.
01What is the VEGATRENN 141 used for?
Galvanic separation and intrinsically safe supply of Ex-approved 4…20 mA/HART sensors.
02Does it pass HART signals?
Yes, bidirectionally, and the signal is accessible at front sockets or the terminals.
03What is the supply voltage?
24…230 V AC or 24…65 V DC.
04What kind of output does it have?
An active 4…20 mA/HART output.
05How is it mounted?
On a 35 x 7.5 mm carrier rail with detachable coded terminals.
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