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Repeater Power Supply HART DC 52500

Powering and Isolation of SMART Transmitters with HART Communication

The Repeater Power Supply DC 52500 is used to supply and separate 2- and 3-wire SMART Transmitters and active sensor signals with HART communication.

  • Universal operation of SMART Transmitters
    Energization and separation of field located 2-, 3- and 4-wire transmitters
  • Bidirectional HART transmission
    HART data transfer for repeater and isolator operation
  • 3-Port isolation
    Protection against erroneous measurements due to parasitic voltages or ground loops
  • Extremely slim design
    6.2 mm slim housing for a simple and space saving installation
  • Optional In-Rail-Bus mounting rail connector
    allows for fast and economical installation
  • Protective Separation acc. to EN 61140
    Protects service personnel and downstream devices against impermissibly high voltage
  • 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)

It supplies the transmitter with power and transmits the measuring signal with high accuracy galvanic isolated to the output. Alternative the measuring input accepts active 0/4 to 20 mA signals from 4-wire transmitters.

In addition to the analog signal, the DC 52500 also transmits data protocols for HART communication. It allows bidirectional communication with the field device from every point of the cabling.

The auxiliary power can be supplied via the connection terminals or via the optional In- Rail-Bus connector. A green LED on the front of the unit has been provided to monitor the power supply.

Product line

Product line DC 52500
Device Type Order No.
Repeater Power Supply, bidirectional HART transmission DC 52500 S
Repeater Power Supply, bidirectional HART transmission,
In-Rail-Bus for power supply
DC 52500 B

Technical Data


Input signal 0/4 to 20 mA (4 to 20 mA with HART signal)
Input resistance ≤ 50 Ohm  
Over load 50 mA / 30 V  
Transmitter supply (Tx) 16 V (open circuit voltage/short circuit current < 22 V/35 mA)
Communication signal Bidirectional HART transmission, internal AC impedance 250 Ohm


Output signal 0/4 to 20 mA (4 to 20 mA with HART signal)
Load 0 to 600 Ohm (at 20 mA) (230 Ohm to 600 Ohm with HART signal)
Linear transmission range –1 to +110 %
Residual ripple < 10 mVrms

General Data

Transmission error < 0.1 % full scale
Temperature coefficient 1) < 100 ppm/K
Cut-off frequency -3 dB 100 Hz,     > 2.5 kHz  HART signal
Response time T99 7 ms
Test voltage 3 kV AC, 50 Hz, 1 min, Input against output against
power supply
Working voltage 2)
(Basic Insulation)
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
Ambient temperature  Operation
Transport and storage
–25 °C to +70 °C   (-13 to +158 °F)
–40 °C to +85 °C   (-40 to +185 °F)
Power supply 24 V DC, voltage range 16.8 V to 31.2 V DC, approx. 1.3 W
EMC 3) EN 61326-1
Approvals UL (USA/Canada): UL 61010, Class I, Div. 2
ATEX / IECEx: Zone 2 (nA)
Construction 6.2 mm (0.244") housing, protection class: IP 20
mounting on 35 mm DIN rail acc. to EN 60715
Connection Captive plus-minus clamp screws
Wire cross-section max. 2.5 mm² / AWG 14
Stripped length 6 to 8 mm / 0.28 in
Screw terminal torque 0.8 Nm / 7 lbf in
Weight Approx. 70 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


Terminal assignments

  • 1 + Transmitter supply voltage U Tx
  • 2 + Input current
  • 3 − Input GND
  • 4 n.c.
  • 5 + Output
  • 6 − Output
  • 7 + Power supply 24 V DC
    (connected to In-Rail-Bus)
  • 8 − Power supply 24 V DC
    (connected to In-Rail-Bus)

Optional power connection via In-Rail-Bus (see accessories)

Subject to change!

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