PR Electronics 9107A HART Transparent Driver


  • 24 VDC supply via power rail or connectors
  • Fast response time
  • High active output load 725 Ohm / 20 mA
  • Output line fault detection via status relay
  • SIL2 certified via Full Assessment according to IEC 61508

PR Electronics 9107A HART Transparent Driver is a versatile 1- or 2-channel isolated driver designed for the operation and control of I/P converters, valves, and indicators. It supports bi-directional HART communication, making it suitable for controlling HART devices. This driver can be mounted in safe areas or hazardous zones, providing reliable signal control and monitoring capabilities.


  • Isolated Signal Driving: Provides isolated 1:1 driving for operation and control of I/P converters, valves, and indicators.
  • HART Device Operation: Supports bi-directional HART communication for controlling HART devices.
  • Signal Splitting: Dual channel versions can be used for signal splitting applications, allowing 1 input to be split into 2 outputs.
  • Loop Current Monitoring: The PR 45xx displays process values and can define high and low limits for loop current detection, activating the status relay if limits are exceeded.

Advanced Features

  • Operational Status Indication: The PR 45xx detachable display and green and red front LEDs indicate the operation status for each channel.
  • Tag Number Assignment: Allows for the definition of a tag number for each channel for easy identification.
  • Fault Detection: Provides output line fault detection for enhanced reliability.
  • Limit Switch Functionality: In the 1-channel version, the status relay can be used as a simple limit switch.
  • Performance Level Compliance: Suitable for use in systems up to Performance Level “d” according to ISO-13849.

Technical Characteristics

  • High Galvanic Isolation: Provides high galvanic isolation of 2.6 kVAC, ensuring robust signal separation.
  • High Accuracy: Delivers high accuracy better than 0.1%, ensuring precise signal control.
  • Data Safety: Continuously checks vital stored data for safety reasons, ensuring reliable operation.


  • Flexible Mounting: Can be mounted vertically or horizontally without distance between neighboring units, allowing for efficient use of space and high channel density.

PR Electronics 9107A HART Transparent Driver is an ideal solution for industries requiring reliable signal driving, HART device control, and advanced monitoring features, particularly in environments with stringent safety and performance requirements.


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
Dimensions (HxWxD) 109 x 23.5 x 104 mm
Dimensions (HxWxD) w/ 4501/451x 109 x 23.5 x 116 / 131 mm
Weight approx. 250 g
Weight incl. 4501 / 451x (approx.) 265 g / 280 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
Supply voltage 19.2…31.2 VDC
Fuse 1.25 A SB / 250 VAC
Max. required power ≤ 1.0 W / ≤ 1.8 W (1 ch. / 2 ch.)
Max. power dissipation, 1 / 2 ch. ≤ 1.0 W / ≤ 1.8 W
Isolation voltage
Test /working: Input to any 2.6 kVAC / 300 VAC reinforced isolation
Analog output to supply 2.6 kVAC / 300 VAC reinforced isolation
Status relay to supply 1.5 kVAC / 150 VAC reinforced isolation
Response time
Response time (0…90%, 100…10%) < 5 ms
Programming PR 45xx
Signal dynamics, input Analog signal chain
Signal dynamics, output Analog signal chain
HART bi-directional communication frequency range 0.5…7.5 kHz
Signal / noise ratio > 60 dB
Accuracy Better than 0.1% of sel. range
mA, absolute accuracy ≤ ±16 μA
mA, temperature coefficient ≤ ±1.6 μA / °C
Effect of supply voltage change on output (nom. 24 VDC) < ±10 μA
EMC immunity influence < ±0.5% of span
Extended EMC immunity: NAMUR NE21, A criterion, burst < ±1% of span
Current input
Measurement range 3.5…23 mA
Sensor error detection: Loop break 4…20 mA < 1 mA
Input voltage drop, supplied unit < 2 V @ 23 mA
Input voltage drop, non-supplied unit < 4 V @ 23 mA
Current output
Signal range 3.5…23 mA
Load (@ current output) ≤ 725 Ω
Load stability ≤ 0.01% of span / 100 Ω
Current limit ≤ 28 mA
Status relay
Relay function N.C.
Programmable low setpoint 0…29.9 mA
Programmable high setpoint 0…29.9 mA
Hysteresis for setpoints 0.1 mA
Max. voltage 125 VAC / 110 VDC
Max. current 0.5 AAC / 0.3 ADC
Max. voltage – hazardous installation 32 VDC / 32 VAC
Max. current – hazardous installation 1 ADC / 0.5 AAC
of span = normal measurement range 4…20 mA
EMC 2014/30/EU
LVD 2014/35/EU
ATEX 2014/34/EU
RoHS 2011/65/EU
EAC TR-CU 020/2011
EAC Ex TR-CU 012/2011
EAC LVD TR-CU 004/2011
c FM us FM16US0465X / FM16CA0213X
c UL us, UL 61010-1 E314307
c UL us, UL 913 E233311 (only 9107xx-U9)
EAC Ex RU C-DK.HA65.B.00355/19
DNV-GL Marine TAA00000JD
ClassNK TA18527M
SIL SIL 2 certified & fully assessed acc. to IEC 61508


PR Electronic 9107A HART transparent driver-DpstarGroup