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Universal uni-/bipolar signal transmitter




  • Measures and outputs uni-/bipolar voltage and current signals
  • Works with both passive and active inputs and outputs
  • Uses the PR 4500 display series for programming and process monitoring
  • Fast < 20 ms response time and excellent < 0.05% accuracy
  • Universally powered by 21.6…253 VAC / 19.2...300 VDC
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  • Fast < 20 ms response time for measuring signals produced by torque, position, current & acceleration sensors.
  • User configurable bipolar or unipolar I/O means the 4104 is suitable for nearly any voltage or current conversion.
  • The excitation source enables measurement of two or three wire transmitters.
  • The active or passive I/O makes the 4104 perfect for power matching current loops.
  • Converts narrow bipolar inputs to wide bipolar or unipolar outputs, e.g., ±1 volt input = ±10 volt or 4...20 mA output.
  • Selectable direct or inverse I/O makes the 4104 suitable for proportional control applications.
  • The ”V-curve” function outputs 100% – 0 – 100% when a 0 – 100% input signal is present.

Technical characteristics

  • The latest analog and digital techniques are used to obtain maximum accuracy and immunity to interference.
  • The current output can drive up to 800 Ohms, with an adjustable response time of 0.0…60.0 seconds.
  • Exceptional mA output load stability of < 0.001% of span/100 Ohm.
  • Meets the NAMUR NE21 recommendations, ensuring high accuracy in harsh EMC environments.
  • Meets the NAMUR NE43 recommendations, allowing the control system to easily detect a sensor error.
  • Each unit is tested to a high 2.3 kVAC, 3-port galvanic isolation level.
  • Excellent signal to noise ratio of > 60 dB.

Mounting / installation / programming

  • Very low power consumption means units can be mounted side by side without an air gap – even at 60°C ambient temperature.
  • Approved for marine applications.
  • Configuration, monitoring, 2-point process calibration and more are accomplished using PR's 4500 series of detachable displays.
  • All programming can be password protected.

Datablad & Manualer



Manualer på ryska

Kompletterande dokumentation

EU försäkran om överensstämmelse

UKCA försäkran om överensstämmelse

Modbus konfigurationsmanual




Godkännanden och certifikat





Metrology Pattern Approval (MPA), Russia

Environmental Conditions

Operating temperature -20°C to +60°C
Storage temperature -20°C to +85°C
Calibration temperature 20...28°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP20
Installation in Pollution degree 2 & meas. / overvoltage cat. II

Mechanical specifications

Dimensions (HxWxD) 109 x 23.5 x 104 mm
Weight approx. 155 g
Weight incl. 4501 / 451x (approx.) 170 g / 185 g
DIN rail type DIN EN 60715/35 mm
Wire size 0.13...2.08 mm2 AWG 26...14 stranded wire
Screw terminal torque 0.5 Nm
Vibration IEC 60068-2-6
2...13.2 Hz ±1 mm
13.2...100 Hz ±0.7 g

Common specifications


Supply voltage, universal 21.6...253 VAC, 50...60 Hz or 19.2...300 VDC
Max. required power ≤ 2.5 W
Max. power dissipation ≤ 2.5 W

Isolation voltage

Isolation voltage, test / working 2.3 kVAC / 250 VAC

Response time

Response time (0...90%, 100...10%) < 20 ms

Auxiliary supplies

2-wire loop supply > 16 V / 20 mA
3-wire loop supply > 18 V / 20 mA
Loop supply limitation 30 mA
Programming PR 4500 communication interfaces
Signal / noise ratio > 60 dB
Cut-off frequency (3 dB) > 40 Hz
Accuracy Better than 0.05% of selected range
EMC immunity influence < ±0.5% of span
Extended EMC immunity: NAMUR NE21, A criterion, burst < ±1% of span

Input specifications

Current input

Signal range ±23 mA
Programmable measurement ranges 0...20 and 4...20 mA ± 10 and ± 20 mA
Input voltage drop 1.4 V @ 20 mA
Loop error detection, 4...20 mA: Low < 3.6 mA
Loop error detection, 4...20 mA: High > 21 mA

Voltage input

Signal range ±12 V
Programmable measurement ranges 0/0.2...1, 0/1...5, 0/2...10 VDC ±1, ±5 and ±10 V
Input resistance > 2 MΩ

Output specifications

Current output

Signal range 0...23 mA (unipolar) -23...+23 mA (bipolar)
Current limit ≤ 28 mA (unipolar) ± 28 mA (bipolar)
Load stability ≤ 0.001% of span / 100 Ω
Response time, programmable 0.0...60.0 s
Output limitation, on 4...20 and 20...4 mA signals 3.8...20.5 mA
Output limitation, on other unipolar mA signals 0 and 115% of max. value
Output limitation, on bipolar mA signals ±115% of min. & max. values
Sensor error indication, at 4...20 mA input: selectable Low, High, Zero, None

Active unipolar and bipolar mA output

Programmable ranges 0...20 and 4...20 mA ±10 and ±20 mA
Direct or Inverted Action
V-curve function, active signals, 100-0-100% 20-0-20 mA
Load (@ current output) ≤ 800 Ω

Passive 2-wire mA output

Programmable ranges 0...20 and 4...20 mA Direct or Inverted action
V-curve function, 100-0-100% 20-0-20 mA
External loop supply 3.5 - 26 V

Voltage output

Programmable signal ranges 0/0.2...1; 0/1...5 ; 0/2...10 V ±1, ±5 and ±10 V
Direct or Inverted action
V-curve function, 100-0-100% 1-0-1, 5-0-5 and 10-0-10 V
Load (@ voltage output) ≥ 500 kΩ
Response time, programmable 0.0...60.0 s
Output limitation - outside range: on unipolar V signals starting from 0 0 and 115% of max. value
Output limitation - outside range: on unipolar V signals with offset -5% of min. value and 115% of max. value
Output limitation - outside range: on bipolar V signals ±115% of min. & max. values
Sensor error indication, at 4...20 mA input: selectable Low, High, Zero, None

Observed authority requirements

EMC 2014/30/EU & UK SI 2016/1091
LVD 2014/35/EU & UK SI 2016/1101
RoHS 2011/65/EU & UK SI 2012/3032
EAC TR-CU 020/2011


c UL us, UL 508 E248256
FM 3025177
DNV Marine TAA0000101


Need support to select the right product for your application?

Our sales engineers are ready to help specify the right device to meet your needs.


Reach out by phone to get in touch with us straight away – or use the contact form or quick quote function to send your RFQ directly from the website. You’ll get a response within 24 hours on normal business days.


You can expect to get a confirmed delivery date via email within 2 days after we have received your order.


As soon as your package leaves our warehouse, you’ll receive tracking details via email. And if you have any questions along the way we’re just a phone call or email away.


State-of-the-art manufacturing

State-of-the-art manufacturing

Our 8,500 sqm integrated and automated manufacturing campus in Denmark covers the entire value-chain from design and development to manufacturing. It allows us to design and optimize for testing and manufacturing thereby constantly driving quality up and costs down.


Dedicated Presales / Aftersales

Dedicated Presale / Aftersales
Our more than 80 dedicated sales engineers can help specify the right device for your application. Backed by our 9 subsidiaries and more than 40 dedicated partners, we are directly accessible in more than 40 countries around the world.


Find a PR location close to you


Product reliability

Product reliability
Although we’d always like to be top of mind, we recognize our job is mainly to provide peace of mind. Install & Forget® is our way of saying that once installed, our devices will continue to perform even in the toughest environments. And we are not afraid to back that statement up with commitments.


Product deployment

Product deployment
Our devices are intuitive and simple to configure. Once installed they visualize rich diagnostics data, allowing the operator to plan preventative maintenance, maximizing process up-time.



Smart products

Smart products
Many of our devices are designed to accommodate current and future communication enablers, providing the operator with multifunctional capabilities that extends into the future.


Check out our range of communication interfaces


Smart products


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