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Universal AC / DC transmitter


  • Measures AC current and voltage signals
  • Outputs passive or active current signals
  • Programming, process monitoring and diagnostics via 45xx
  • Response time < 0.75 s and excellent accuracy better than 0.3%
  • Universally powered by 21.6…253 VAC / 19.2...300 VDC
  1. Overview +

  2. Technical details +

  3. Accessories +


  • The 0...5 AAC RMS range makes it possible to accurately measure a typical current transformer.
  • The 0...300 VAC RMS range allows accurate supply voltage monitoring.
  • The 4179 measures standard input ranges, and can be freely configured to customer-defined input range.
  • Converts narrow AC current / voltage inputs to wide bipolar or unipolar outputs, e.g. 0...1 VAMS input = ±10 volt or 4...20 mA output with a minimum span of 0.5 AAC RMS or 0.5 VAC RMS.
  • The detachable 45xx displays provide enhanced diagnostics.
  • Configurable input limits control the output value for increased safety.
  • The 4179 has been designed according to strict safety requirements and is therefore suitable for application in SIL 2 installations.
  • Suitable for the use in systems up to Performance Level “d” according to ISO-13849.

Technical characteristic

  • The latest analog and digital techniques are used to obtain maximum accuracy and immunity to interference.
  • Possibility of output safety feedback by selecting S4...20 mA output.
  • 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 an input error.
  • 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.
  • Configuration, monitoring, 2-point process calibration and more are accomplished using PR's 45xx detachable displays.

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
Dimensions (HxWxD) w/ 4501/451x 109 x 23.5 x 116 / 131 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 ≤ 1.8 W nom.
Internal power dissipation ≤ 2.5 W

Isolation voltage

Test voltage 2.3 kVAC
Working voltage 250 VAC (reinforced) / 500 VAC (basic)

Response time

Response time (0...90%, 100...10%) < 0.75 s
Programming PR 45xx
Signal dynamics, input 20 bit
Signal dynamics, output 18 bit
Signal / noise ratio > 60 dB
Output referred common mode rejection ratio 0.02 ppm / VHz
Accuracy Better than 0.3% of selected range*
EMC immunity influence < ±0.5% of span*
Extended EMC immunity: NAMUR NE21, A criterion, burst < ±1% of span*
of span = of selected standard range

Input specifications

Current input

Signal range 0...5 AAC / 40...400 Hz
Maximum input limit 6.00 AAC @ 40°C
Programmable measurement ranges 0...0.5; 0…1; 0…2.5 & 0...5 AAC
Custom configurable signal range 0...5 AAC /40...400 Hz
Min. measurement range (span) 0.5 AAC
Input resistance Nom. < 0.07 Ω

Voltage input

Signal range 0...300 VAC / 40...400 Hz
Programmable measurement ranges 0...0.5, 0...1, 0...2.83, 0…5, 0…120, 0…230 & 0…300 VAC
Custom configurable signal range 0...300 VAC / 40...400 Hz
Min. measurement range (span) 0.5 VAC
Input resistance Nom. 3 MΩ || 100 pF

Output specifications

Active unipolar and bipolar mA output

Programmable ranges 0...20, 4...20 and S4...20 mA ±10 and ±20 mA
Direct or Inverted Action
Load (@ current output) ≤ 800 Ω
V-curve function, active signals, 100-0-100% 20-0-20 mA

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...30 V

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

Voltage output

Programmable signal ranges 0/0.2...1; 0/1...5 ; 0/2...10; 1...0.2/0; 5...1/0; 10...2/0 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

Observed authority requirements

EMC 2014/30/EU
LVD 2014/35/EU
RoHS 2011/65/EU
EAC TR-CU 020/2011


c UL us, UL 508 E248256
SIL Hardware assessed for use in SIL applications


* / ** For custom configurable signal ranges, general accuracy and EMC specifications are 0.3% of full scale

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