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AC / DC transmitter


  • Input galvanically separated from output and supply
  • AC current measurement
  • AC voltage measurement
  • Current and voltage output
  • 24 VDC supply or universally supplied
  • Applicable in PELV/SELV circuits
  1. Overview +

  2. Technical details +

  3. Accessories +

Advanced features

  • ±20% adjustment of the 0 and the 100% measurement range is possible at the front panel.
  • Input and output ranges are programmable by use of internal DIP-switches.


  • AC current measurement e.g. in connection with a current transformer or a current clamp.
  • Direct AC voltage measurement.

Technical characteristics

  • Analog signal conditioning with microprocessor based gain and zero offset.
  • Signals in the ranges 0.5...250 VRMS sinusoidal voltage can be connected directly to the input, ranges are programmed via DIP-switches and jumpers.
  • Analog standard current output of 0/4...20 mA or standard voltages of 0...1 or 0...10 VDC ranges are programmed via DIP-switches and jumpers.
  • Special currents and voltages within the signal range.
  • Signal reversal e.g. 20...4 mA is possible in a special version.
  • Universally supplied units have a 3-port galvanic separation between input, supply, and output.
  • Mounting for a standard 11-pole socket which can be adapted for DIN rail or plate use with PR’s 7023 adaptor and 7024 mounting keying.

Environmental Conditions

Operating temperature -20°C to +60°C
Calibration temperature 20...28°C
Relative humidity < 95% RH (non-cond.)
Protection degree IP50

Mechanical specifications

Dimensions (HxWxD) 80.5 x 35.5 x 84.5 mm (D is without pins)
Weight DC / universally supplied 100 g / 160 g

Common specifications


Supply voltage 19.2...28.8 VDC
Supply voltage, universal 21.6...253 VAC, 50...60 Hz or 19.2...300 VDC
Max. required power ≤ 1.3 W (2279--D) ≤ 2.7 W (2279--P)

Isolation voltage

Isolation voltage, test / working 3.75 kVAC / 250 VAC

Response time

Response time (0...90%) < 1.5 s
Signal / noise ratio Min. 60 dB
Effect of supply voltage change < 0.005% of span / VDC
Temperature coefficient < ±0.01% of span / °C
Linearity error < ±1% of span
EMC immunity influence < ±0.5% of span

Input specifications

Common input specifications

Max. offset 50% of max. value

Current input

Measurement range 0...1 ARMS / 40...400 Hz
Min. measurement range (span) 500 mARMS
Input resistance Nom. 1 Ω

Voltage input

Measurement range 0...250 VRMS / 40...400 Hz
Min. measurement range (span) 0.5 VAC
Input resistance > 1 MΩ

Output specifications

Current output

Signal range 0...5 mA / 0...20 mA
Min. signal range 4 mA / 16 mA
Load (@ current output) ≤ 600 Ω
Load stability ≤ 0.01% of span / 100 Ω
Current limit 23...28 mA
Voltage output through internal shunt See manual for details
of span = of the presently selected range

Observed authority requirements

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