All Way Signal Isolation Converter.

DAT4235

DAT4235 All Way Signal Isolation Converter.
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All Way Signal Isolation Converter DAT4235.
• Universal input Isolated Signal converter.
• Input Thermocouples, RTD's, Potentiometers, Resistance and mV.
• PC Programmable Micro USB.
• All Way Isolation.
• DIN Rail Mounted.
• Output damping.
• LED power Indication.
General Description

The DAT4235 is a high-performance universal signal converter designed for industrial signal isolation and conversion. It supports a wide range of input types—such as thermocouples, RTDs, mA, V, mV, resistance, and potentiometers—and converts them into linear 4-20mA or voltage outputs. With galvanic isolation between input, output, and power supply, and a compact 12.5 mm DIN rail mountable enclosure, the DAT4235 is ideal for space-saving installations in control panels and distributed I/O systems.

Key Features

  • Universal Input: Accepts thermocouples, RTDs (2/3/4 wire), mA, V, mV, resistance, and potentiometers.
  • Bipolar Input Capability: Handles negative input signals such as -10V or -20mA.
  • Linearized Output: Converts the input signal into linear 4-20mA or voltage output.
  • Cold Junction Compensation: Built-in compensation for thermocouple inputs with automatic linearization.
  • High Accuracy: ±0.1% of full scale with thermal drift less than 0.01%/°F (0.02%/°C).
  • Configurable Ranges: Input and output ranges can be programmed freely within specified spans; includes selectable high or low burnout.
  • PC Programmable: Easily configured using DATEXEL ProSoft software (v3.06), available for free download at www.datexel.com.
  • Full Galvanic Isolation: 1500 Vac isolation between input, output, and power supply to eliminate ground loops and improve system safety.
  • Compact DIN Rail Design: Just 12.5 mm wide, mountable on top-hat or G-type DIN rail per EN-50022 and EN-50035 standards.
  • EMC Compliant: Fully compliant with EMC Directive 89/336/CEE for electromagnetic compatibility.
  • DAT4235SEL Version: Special variant with SEL input to enable/disable the output signal remotely—useful for multiplexer setups.

The DAT4235 is engineered for flexibility and accuracy in signal conditioning applications across process control, automation, and instrumentation. Its compact size, universal input range, and strong isolation make it a valuable tool for demanding industrial environments.

INPUT OUTPUT POWER SUPPLY
Current, Thermocouples, RTD, Voltage, Current 4-20mA, 0-20mA, 20-0mA Power Supply Voltage 18-32Vdc
Potentiometer, Resistance. Voltage 0-10V, 10-0V. Reverse polarity protection 60Vdc
CURRENT CONSUMPTION CONFIGURATION ISOLATION
Between 35 and 55 mA PC Programmable Between Input/Comms/Power Supply 1500Vac.
EMC HOUSING TEMPERATURE
For Industrial environments Material self-extinguishing Operating Temperature -40°F +185°F -40°C +85°C
Immunity EN 61000-6-2 Dimensions W x H x T 4 2/5 x 3 1/2" x 1/2" Storage Temperature -40°F +185°F-40°C +85°C
Emission EN 6100-6-4 112 x 90x x 12.5 mm Humidity (non condensing) 0-90%
Weight 3 oz 90 g
DAT4235 Datasheet
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Applications
Drawings
Signal Isolators

Specifications
Input type: Min  Max  Min. span 
K Type Thermocouple -328℉ 2500℉ 122℉
-200℃ 1370℃ 50℃
J Type Thermocouple -328℉ 2192℉ 122℉
-200℃ 1200℃ 50℃
R Type Thermocouple -58℉ 3200℉ 752℉
50℃ 1760℃ 400℃
S Type Thermocouple -58℉ 3200℉ 752℉
50℃ 1760℃ 400℃
B Type Thermocouple 752℉ 3308℉ 752℉
400℃ 1820℃ 400℃
E Type Thermocouple -328℉ 3308℉ 122℉
-200℃ 1000℃ 50℃
T Type Thermocouple -328℉ 752℉ 122℉
-200℃ 400℃ 50℃
N Type Thermocouple -328℉ 2372℉ 122℉
-200℃ 1300℃ 50℃
RTD 2,3,4 wires      
Pt100 -328℉ 1562℉ 68℉
-200℃ 200℃ 20℃
Pt1000 -328℉ 392℉ 122℉
-200℃ 200℃ 50℃
Ni100 -76℉ 356℉ 68℉
-60℃ 180℃ 20℃
Ni1000 -76℉ 302℉ 122℉
-60℃ 150℃ 50℃
Voltage
mV -400mV 400mV 2 mV
mV -100mV 700mV 2 mV
Volts -10V 10V 500mV
Potentiometer
Nominal value 0Ω 200Ω 10%
200Ω 500Ω 10%
0.5KΩ 50KΩ 10%
RES. 2,3,4 wires
Low 0Ω 300Ω 10Ω
High 0Ω 2000Ω 10Ω
Current
mA -20mA 20mA 2mA
Output type Min Max Min. span
Direct current 4 mA 20 mA 4 mA
Reverse current 20 mA 4 mA 4 mA
Direct voltage 0 V 10 V 1 V
Reverse voltage 10 V 0 V 1 V
Input calibration  
RTD > of ±0.1% f.s. or ±0.36 ℉ ±0.2 ℃
Low res. > of ±0.1% f.s. or ±0.27 ℉ ±0.15℃
High res. > of ±0.2% f.s. or ±1 Ω
mV, T/C > of ±0.1% f.s. or ±18 uV
Volts > of ±0.1% f.s. or ±2 mV
mA > of ±0.1% f.s. or ±6 uA
Output Calibration
Current ±7 uV
Voltage ±5 mV
Input impedance
T/C, mV <=10MΩ
Volts <=1MΩ
Current ~ 50Ω
Linearity (1)
T/C ± 0.2 % f.s.
RTD ± 0.1 % f.s.
Line resistance influence
T/C mV <=0.8uV/Ω
RTD 3 wires 0.05%/Ω 50Ω (balanced max)
RTD 4 wires 0.005%/Ω 100Ω (balanced max)
RTD excitation current
Typical 0.35mA
Thermal drift (1)  
Full scale ±0.018 ℉ ±0.01% ℃
CJC ±0.018 ℉ ±0.01% ℃
Response time (10÷ 90%) about 50 ms
Burn-out values  
Max Current Output value 21.5mA
Min Current Output value -21.5mA
Max Voltage Output value 10.5 V
Min Voltage Output value -10.5 V
Damping time constant  
Selectable from 0.1 to 30 s.
Value 0 function not active.
Power supply
Power supply voltage 10 .. 32 Vdc
Reverse polarity protection 60 Vdc max
Current Consumption
Current Output 55 mA
Voltage Output 35 mA
Output Load resistance
Current output Rload >650Ω
Voltage output Rload <600Ω
Between Input, Output and Power supply 1500 Vac, 50Hz, 1 Min
Temperature & humidity
Operative temperature -40℉ to 185℉
-40℃ to 85℃
Storage temperature -40℉ to 185℉
-40℃ to 85℃
Humidity (not condensed) 0 to 90 %
Maximum Altitude 2000m
Installation Indoor
Category of installation II
Pollution Degree 2
Housing
Material Self-extinguishing plastic
IP Code IP20
Wiring 0.8 to 2.1 mm2 AWG14-18
Tightening Torque 0.8 N m
Mounting DIN Rail EN-50022 and EN-50035
Weight 3 Oz
90 g.
Dimensions W 0.5" H 3" D 4.4"
W 12.5mm H 90mm D 112mm
EMC for industrial environments
Immunity EN 61000-6-2
Emission EN 61000-6-4
Drawings

DAT4235: CONFIGURATION

Notice: Before programming, check that the drivers have previously been installed on the Personal Computer.
1) Open the protective plastic cover to access the Micro USB connection on DAT4235.
2) Connect the two plugs of cable CVPROG to the Personal Computer (USB plug) and to the device (uUSB plug).
3) Run the software PROSOFT. Set the COM port assigned to the CVPROG cable by the Operative System.
4) Set the parameters of configuration.
5) Program the device.

CONFIGURATION BY CABLE CVPROG

Notice, during this operation don't power on the device. How to program a Head Mounted Temperature Transmitter

DAT4235: INSTALLATION INSTRUCTIONS

The DAT4235 is suitable for DIN rail mounting with EN-50022 Top Hat and EN-50035 G Section rails.

DAT4235 ISOLATION STRUCTURE

The input and output are isolated from each other and the power supply.

isolation structure of the Dat4235
Thermocouple Input
Thermocouple Input  
Thermocouple Terminals + L and - I
Thermocouple input connections for Dat4235
mV Input
mV Input
mV Terminals + L and - I
millivolt input connections for Dat4235
2 Wire RTD Input
2 Wire RTD and 2 Wire Resistance Input
2 Wire RTD Terminals G and I
2 Wire Resistance Terminals G and I
2 wire Resistance input connections for Dat4235
3 Wire RTD Input
3 Wire RTD and 3 Wire Resistance Input
3 Wire RTD Terminals G,H and I
3 Wire Resistance Terminals G,H and I
3 wire Resistance input connections for Dat4235
4 Wire RTD Input
4 Wire RTD and 4 Wire Resistance Input
4 Wire RTD Terminals G,H and L,I
4 Wire Resistance Terminals G,H and L,I
4 Wire RTD input connections for Dat4235
Potentiometer Input
4 Wire RTD Terminals G,I and wiper H
potentiometer input connections for Dat4235
Voltage Input
Volts Terminals + E and - I
Voltage input connections for Dat4235
Passive mA Input
Passive mA Input  
mA input connections for Dat4235
DAT4235: Power Supply Connections
18 to 30 Vdc power supply  
Power Supply Terminals + Q and - R
Power Supply for DAT4235
DAT4235: Output Signals
Voltage Output  
Signal Terminals + N and - M
Voltage signal output for DAT4235
Current Output  
Signal Terminals + N and - M
Current signal output for DAT4235
DAT4235: Damping Function
Damping Function of the DAT4235
DAT4235: Dimensions
DAT4235 dimensions

The DAT4235 is provided as requested on the Customer's order. Refer to the section “Technical specification” to determine input and output ranges. The mounting kit for DIN rail is provided only on request with code DIN RAIL. In case the configuration is not specified, the parameters must be set by the user.

DAT4235: Dimensions
DAT4235 Pt1003 Wires0-200℉ S.L.4-20mA Burn-out up
Column 1 Product Name DAT4235
Column 2 Input type mA, Volts, RTD, Resistance, mV, or Pot
Column 3 Sensor option RTD/Res 2, 3, or 4 wire
Column 4 Input range Zero and span setting
Column 5 linearization linearization options
S.L. Standard linearization
N.L. No linearization
C.L. linearization by step Custom: specify input curve
Column 6 Burn out up Burnt output option High or Lo
LED Signal Indication

The DAT4235 has an LED on the front panel for status indication.

LEDColorStateDescription
PowerGreenOnDevice has power
OffDevice has no power
Applications

Frequently Asked Questions

Which Signal Isolator should I buy?
Datexel offers a wide range of signal isolators for different applications:
  • DAT511: A low-cost, loop-powered isolator accepting 4-20mA input and providing a galvanically isolated 4-20mA output. Simple and passive.
  • DAT4535: A DIP switch-programmable upgrade to the trusted DAT4035, offering the same capabilities at a lower price.
  • DAT4531 Series:
    • DAT4531A: Thermocouple and mV inputs
    • DAT4531B: RTD and resistance inputs
    • DAT4531C: Thermistor or potentiometer inputs
    • DAT4531D: Current and voltage inputs
    All models are PC or DIP switch programmable and provide either current or voltage output.
  • DAT4532 Series: Dual-channel version of DAT4531 models, each with isolated input/output.
  • DAT4632: A splitter with one input and two identical outputs. Same input options as DAT4532; outputs can be current or voltage.
  • Head Mount Options: Includes DAT1061 and DAT1066 (TC/RTD in, 4-20mA out) and DAT1135 (TC/RTD in, 0-10V out).
What types of signals can the DAT4235 accept?
The DAT4235 supports thermocouples, RTDs (2-, 3-, or 4-wire), mA, V, mV, resistance, and potentiometer inputs.
What are the output options for the DAT4235?
The DAT4235 provides isolated analog outputs in either 4-20mA or voltage format, configurable via software.
Is the DAT4235 isolated?
Yes, the DAT4235 features 1500 Vac galvanic isolation between input, output, and power supply for maximum safety and noise immunity.
What is the DAT4235SEL version?
The DAT4235SEL allows you to enable or disable the output via a control signal (4-30 VDC) on the SEL input, making it useful for multiplexer applications.
How do I configure the DAT4235?
Configuration is done using the free ProSoft v3.06 software from Datexel. The software allows you to set input/output ranges, scaling, burnout behavior, and more.

DAT4235 Custom Made Products

What is a DAT 4235 31108?
Input Range ± 250 mA.
What is a DAT 4235 190614?
Input for ± 15 Vdc.
What is a DAT 4235 40220?
Input for PTC RE 95180 Bosch thermistor, range -40°C to +150°C.
What is a DAT 4235 111220?
Input for NTC PTM51F thermistor (0 to 200°C), fixed 0-10 V output.
What is a DAT 4235 40221?
Input for NTC 10k thermistor RL0503, 10-150°C range, 0-10 V output.
What is a DAT 4235 110221?
NTC5k Noris Automation thermistor input, 0-120°C range, 4-20 mA output.
What is a DAT 4235 170321?
NTC 10k Eliwell temperature sensor, -10 to 100°C range, 4-20 mA output.

DAT4135 Custom Products

Most special products designed for the DAT4135 can also be provided using the DAT4235 hardware platform.

What is a DAT 4135 91210?
Input for NTC 20K @ 25°C, beta 3991K thermistor.
What is a DAT 4135 151111?
Input for 0-300 µA.
What is a DAT 4135 260612?
Input for NTC 10K @ 25°C PT-43C, Beta: 3970 thermistor.
What is a DAT 4135 170713?
Input for NTC 20K Selco Products Curve “C”, -5 to 105°C, 4-20 mA output.
What is a DAT 4135 270214?
Input for Pt100 4-wire RTD, -258 to +100°C, 0-10 V output.
What is a DAT 4135 270514?
Input for NTC Ford 0-100°C thermistor.
What is a DAT 4135 170614?
Input for NTC 0-60°C Table B thermistor.
What is a DAT 4135 310715?
Input for NTC beta 2252 thermistor.
What is a DAT 4135 191115?
Input for NTC 49k thermistor, 15°C to 150°C range.
What is a DAT 4135 230216?
Input for NTC pt25e2 thermistor.
What is a DAT 4135 250216?
Input for NTC USP7766 0-100°C thermistor.
What is a DAT 4135 300516?
Input for NTC Honeywell 100-250°C, 4-20 mA output.
What is a DAT 4135 150616?
NTC Vishay 0-150°C input, 0-10 V output.
What is a DAT 4135 160616?
NTC Infineon 0-150°C input, 0-10 V output.
What is a DAT 4135 110117?
NTC EPCOS thermistor input, 15-100°C range.
What is a DAT 4135 150317?
NTC 100K input, 100 to 180°C range, 4-20 mA output.
What is a DAT 4135 230617?
Input for Tc Ni-NiMo (18%) thermocouple, 0 to 1400°C, 4-20mA output.
What is a DAT 4135 80218?
NTC 10k Warm-up thermistor input, 0-40°C, 0-10V output.
What is a DAT 4135 160218?
NTC 10k Graph thermistor input, 0-100°C, 0-10V output.
What is a DAT 4135 180718?
NTC 10k Maxwell thermistor input, -5 to 65°C, 0-10V output.
What is a DAT 4135 140119?
NTC thermistor input, -30°C to +220°C.
What is a DAT 4135 50319?
NTC 10k Cambridge thermistor input, 0-100°C, 4-20 mA output.
What is a DAT 4135 210520?
NTC 92-27-006 thermistor input, 0 to 150°C range, 4-20 mA output.

Applications

The DAT4235 is ideal for industrial applications requiring signal isolation and conversion. It ensures stable, accurate, and interference-free transmission of analog signals even in harsh environments. Typical use cases include PLC interfacing, signal retransmission, long cable runs, and industrial data acquisition systems.

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