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HART transparent repeater


  • 24 VDC supply via power rail or connectors
  • Active and passive mA input
  • Active or passive output via the same two terminals
  • Splitter function - 1 in and 2 out
  • SIL2 / SIL3 Full Assessment and certified acc. to IEC 61508
  1. Overview +

  2. Technical details +

  3. Accessories +


  • 9106A is a 1- or 2-channel isolated 1:1 repeater.
  • The device supplies 2-wire SMART transmitters and can also be used for 2-wire SMART current sources. HART & BRAIN protocols are supported and are transferred bi-directionally.
  • 9106A can be mounted in and receive signals from non-classified area or zone 2.
  • For duplication/migration purposes, the outputs can be sent to two different DCS/PLC/HMI or any monitoring system.
  • In safety applications (SIL loops), the 9106AxB can be used as a splitter with the following output configuration:
    · When using 9106AxB in a SIL2 safety function, channel 1 is used for the safety loop. Channel 2 can be used for any non-safety device.
    · For higher safety purposes (SIL 3), 9106AxB can be used as a splitter for SIL 3 loops. Channel 1 and 2 are then connected to the same safety PLC, where channel 2 is used as a redundant diagnostic channel. (For more information, consult the FMEDA Report and the Safety Manual).

Advanced features

  • The detachable display and the green and red front LEDs indicate operation status for each channel.
  • Monitoring of error events and cable breakage on input via the individual status relay and/or a collective electronic signal via the power rail.

Technical characteristics

  • High galvanic isolation of 2.6 kVAC.
  • Fast response time <5 ms
  • High accuracy better than 0.1%.
  • 2-wire transmitter supply >16 V.


  • The devices can be mounted vertically or horizontally without distance between neighbouring units.

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/ 4501/4511 109 x 23.5 x 116 / 131 mm
Weight approx. 250 g
Weight incl. 4501 / 4511 (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

Common specifications


Supply voltage 19.2...31.2 VDC
Fuse 1.25 A SB / 250 VAC
Max. required power ≤ 1.1 W / ≤ 1.9 W (1 ch. / 2 ch.)
Max. power dissipation, 1 / 2 ch. ≤ 0.8 W / ≤ 1.2 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
SMART 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

Input specifications

Current input

Measurement range 3.5...23 mA
2-wire transmitter supply 9106A1x >16 V / 20 mA
2-wire transmitter supply 9106A2x >15 V / 20 mA
Sensor error detection: Loop break 4...20 mA < 1 mA
Input voltage drop, supplied unit < 4 V @ 23 mA
Input voltage drop, non-supplied unit < 6 V @ 23 mA

Output specifications

Current output

Signal range 3.5...23 mA
Load (@ current output) ≤ 600 Ω
Load stability ≤ 0.01% of span / 100 Ω
Current limit ≤ 28 mA

Passive 2-wire mA output

Effect of external 2-wire supply voltage variation < 0.005% of span / V
Max. load resistance [Ω] (Vsupply-3.5)/0.023 A
Max. external 2-wire supply 26 VDC

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 110 VDC / 125 VAC
Max. current 0.3 ADC / 0.5 AAC
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

Observed authority requirements

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


ATEX 2014/34/EU PR 14ATEX0101 X
UL UL 61010-1
DNV-GL Marine Stand. f. Certific. No. 2.4
ClassNK TA18527M
SIL SIL 2 / SIL 3 certified & fully assessed acc. to IEC 61508
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