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Isolation Amplifier DN 28

Isolation and Conversion of Standard Signals

The Isolation Amplifier DN 28 is used for isolation and conversion of 0 to 20 mA, 4 to 20 mA and 0 to 10 V standard signals.

  • Cost optimized design
    Economical separation for standard applications
  • Only 60 mm installation depth, 11.2 mm wide
    Can be installed in economical standard terminal boxes
  • Fixed ranges, easy to use
    Ready to use without any settings or adjustments
  • True 3-port separation
    Protection against erroneous measurements due to parasitic voltages or ground loops
  • Protective Separation acc. to EN 61140
    Protects service personnel and downstream devices against impermissibly high voltage
  • Unlimited use with 24 V AC/DC power supply
    Universally applicable for all measurement and industrial applications
  • 5 Years Warranty
    Defects occurring within 5 years from delivery date shall be remedied free of charge at our plant (carriage and insurance paid by sender)

For applications where one signal combination only is used, the Isolation Amplifier DN 28 offers a cost-effective alternative.

A cross-connector for the auxiliary power supply ensures fast and easy installation. The slim housing with 11.2 mm width saves significant space on the DIN-rail. If required a measuring range compensation can be performed at the Zero/Scan potentiometers behind the front cover.

Analog signal processing guarantees precise measured values with short response times and outstanding signal reproduction at the output. Protective Separation and the 24 V AC/DC power supply make the DN 28 universally applicable for all measurement and industrial applications, as well as for building automation.

Product line

Product line DN 28
Input Output Order No.
0 ... 20 mA 0 ... 20 mA DN 28 P – 12
4 ... 20 mA 0 ... 20 mA DN 28 P – 32
0 ... 10 V 0 ... 20 mA DN 28 P – 52
0 ... 20 mA 4 ... 20 mA DN 28 P – 14
4 ... 20 mA 4 ... 20 mA DN 28 P – 12
0 ... 10 V 4 ... 20 mA DN 28 P – 54
0 ... 20 mA 0 ... 10 V DN 28 P – 16
4 ... 20 mA 0 ... 10 V DN 28 P – 36
0 ... 10 V 0 ... 10 V DN 28 P – 56

Technical Data

Input

Input signal 0 to 20 mA, 4 to 20 mA, 0 to 10 V
see product line
Input resistance Current input
Voltage input
approx. 5 Ohm
approx. 1 MOhm
Overload Current input
Voltage input
≤ 200 mA
≤ 250 V

Output

Output signal 0 to 20 mA, 4 to 20 mA, 0 to 10 V
see product line
Load Current output
Voltage output
≤ 500 Ohm
≥ 2 kOhm
Residual ripple < 10 mVrms

General Data

Transmission error < 0.2 % full scale
Temperature coefficient 1) < 0.02 %/K
Cut-off frequency -3 dB 200 Hz
Response time T99 3.5 ms
Test voltage 2.5 kV, 50 Hz, 1 min., input against output against
power supply
Working voltage
(Basic Insulation) 2)
600 V AC/DC for overvoltage category II and pollution
degree 2 acc. to EN 61010 -1
Protection against
electrical shock 2)
Protective separation according to EN 61140 by reinforced
insulation in accordance with EN 61010-1 up to 300 V AC/DC
for overvoltage category II and pollution degree 2 between
all circuits.
Ambient temperature Operation
Transport and storage
–20 °C to +60 °C   (–4 °F to +140 °F)
–35 °C to +85 °C   (–31 °F to +185 °F)
Power supply 24 V AC/DC, ± 15 % AC: 48 to 62 Hz, approx. 2 VA
DC: approx. 0.7 W
EMC 3) EN 61326 -1
Construction 11.2 mm (0.44") housing, protection classt: IP 20
mounting on 35 mm DIN rail acc. to EN 60715
Connection Wire cross-section max. 2.5 mm²
Weight Approx. 50 g
  1. Average TC related to full scale value in specified operating temperature range, reference temperature 23 °C
  2. For applications with high working voltages, ensure there is sufficient spacing or isolation from neighboring devices and protection against electric shocks.
  3. Minor deviations possible during interference.

Block diagram

Dimensions

Terminal assignments

  • 1 + Input
  • 2 − Input
  • 3 -
  • 4 -
  • 5 + Output
  • 6 − Output
  • 7 Power supply 24 V AC/DC
  • 8 Power supply 24 V AC/DC

Subject to change!

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Product request

Please calculate 4 plus 8.