TT231: RTD / Resistance Input Two-Wire Transmitter
Please sign in or register to see model options and to add products to your cart.
Product short description:
- 100 ohm Pt RTD or 0-900 ohm input
- 4-20mA output (sink/source)
- 12-32V DC loop/local power
- USB configuration
The TT231 model is a space-saving two-wire transmitter that converts a 100 ohm Platinum RTD sensor input to a proportional 4-20mA signal. Power is received from the output loop current or a DC supply when using a three-wire connection.
Click here to watch a short AcroMaggie video highlighting the TT230 Series.
- Description
- Features & Benefits
- Tech Papers
- Specs & Data Sheets
- Software
- Accessories
- Additional information
TT231: RTD / Resistance Input Two-Wire Transmitter Description
The TT231 model is a space-saving two-wire transmitter that converts a 100 ohm Platinum RTD sensor input to a proportional 4-20mA signal. Power is received from the output loop current or a DC supply when using a three-wire connection.
The transmitter provides sensor excitation plus performs linearization, lead-wire compensation, and lead-break detection.
Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software.
Advanced signal processing capabilities, variable range input, and convenient USB programming make this instrument a very versatile temperature measurement device.
These transmitters can withstand harsh industrial environments and operate reliably across a wide temperature range with very low drift. They feature RFI, EMI, ESD, EFT, and surge protection plus low radiated emissions.
Learn more about the TT Series of Isolated Transmitters and view all models >
TT231: RTD / Resistance Input Two-Wire Transmitter Performance Specifications
IMPORTANT: To prevent damage or errors from grounded PCs and surges, Acromag strongly recommends the use of their USB-ISOLATOR when configuring a TT230 Series transmitter.
USB Interface
USB Connector: USB Mini-B type socket, 5-pin.
USB Data Rate: 12Mbps. USB v1.1 and 2.0 compatible.
USB Transient Protection: Transient voltage suppression on power and data lines.
USB Cable Length: 5.0 meters maximum.
Driver: Not required. Uses built-in Human Interface Device (HID) USB drivers of the Windows operating system.
Input
Default Configuration: 100Ω Pt RTD, α=0.00385 Ω/Ω/°C, 0-200°C input, 4-20mA output, upscale break detection.
Input Configuration: Two-, three- or four-wire sensor input connections.
Input Ranges
100 ohm Platinum RTD, alpha = 375-393, 385 (default), -50 to 850°C (-58 to 1562°F)
0 to 900 ohms linear resistance
Programs in °C, °F, or ohmic integer values only.
Zero Adjust
RTD 3/4 wire: -50, -17.78, or 0°C (-58, 0, 32°F).
RTD 2 wire: 0°C (32°F) fixed.
RES: 0 or 100 ohms.
Full-Scale Adjust:
RTD: up to 850°C (1562°F), 50°C (58°F) span minimum.
Resistance: up to 900 ohms, 8 ohm span minimum.
Excitation Current: 0.5mA, nominal, each ± lead.
Lead-Wire Compensation: 25 ohms per lead.
Lead Break (Sensor Burnout) Detection: Configurable for either upscale or downscale.
Input Filter Bandwidth: -3dB at 700Hz, typical, normal mode filter.
Output
Output Range: 4 to 20mA DC.
Under-scale limit adjustable for 2.1 to 3.6mA, nominal.
Over-scale limit adjustable for 21 to 30mA, nominal.
Output Fault Limits (Sensor Fault): 0.4mA below selected under-scale threshold and 1.0mA above over-scale threshold, typical.
Output Compliance
Rload = (Vsupply – 8.6V) / 0.020A.
Rload = 0 to 750 ohms @ 24V DC.
Output Accuracy: Better than ±0.1% of span, typical for spans less than 500°C. Includes the effects of repeat-ability, terminal point conformity, and linearization, but does not include sensor error.
Ambient Temperature Effect: Better than ±0.008% per °C of input span or ±80ppm/°C, typical. Includes the combined effects of zero and span drift over temperature.
Output Response Time (for step input change): 500μS, typical with 250 ohm load (to reach 98% of final output value).
Environmental
Operating temperature: -40 to 80°C (-40° to 176°F).
Storage temperature: -40 to 85°C (-40 to 185°F).
Relative humidity: 5 to 95% non-condensing.
Power Requirement: 9-32V DC SELV (Safety Extra Low Voltage), 30mA max.
Shock and Vibration Immunity
Vibration: 4g, per IEC 60068-2-6
Shock: 25g, per IEC 60068-2-27
Electromagnetic Compatibility (EMC) Compliance
Radiated Emissions: BS EN 61000-6-4, CISPR 16.
RFI: BS EN 61000-6-2, IEC 61000-4-3.
Conducted RFI: BS EN 61000-6-2, IEC 61000-4-6.
ESD: BS EN 61000-6-2, IEC 61000-4-2.
EFT: BS EN 61000-6-2, IEC 61000-4-4.
Surge Immunity: BS EN 61000-6-2, IEC 61000-4-5.
Approvals: CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX / IECEx Zone 2.
Physical
General: General-purpose enclosure designed for mounting on 35mm “T-type” DIN rail.
Case Material: Self-extinguishing polyamide, UL94 V-0 rated, color light gray. General-purpose NEMA Type 1 enclosure.
I/O Connectors: Removable plug-in terminal blocks rated for 12A/250V; AWG #26-12, stranded or solid copper wire.
Dimensions: 12.5 x 114.5 x 99.0 mm (0.5 x 4.51 x 3.90 inches).
Shipping Weight: 0.22 kg (0.5 pounds) packed.
Learn more about the TT Series of Isolated Transmitters and view all models >
- Easy setup and digital calibration via USB with Windows configuration software
- Flexible RTD or linear resistance input ranges (any 100 ohm Pt RTD with 375-393 alpha)
- Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
- High accuracy, linearity, stability, and reliability
- Advanced analog signal conditioning ASIC eliminates digitization errors
- Low temperature drift (<80ppm/°C)
- Supports sink or source output wiring
- Programmable over/under-range limits
- Selectable upscale or downscale operation for sensor errors and lead-break detection
- NAMUR-compliant output loop current
- Shock (50g) and vibration (5g) resistant
- Mounts on Type T DIN-rail
- Wide ambient operation (-40 to 80°C)
- CE compliant. UL/cUL Class I Div 2, ATEX / IECEx Zone 2 approvals
-
TT230-Config/Cal: Calibration Service
- Factory custom configuration/calibration service.
- Specify input type, input/output zero and full-scale values, filtering, and sensor fault settings on order.
Select options -
TTBus-Kit: DIN Rail Bus Power Connector
- One kit supports multiple TT330 series transmitters.
- For multiple DT330/351 or SP330 transmitters, one TTBUS-KIT is required for each transmitter to be DC Power wired via the bus rail power connections.
Select options
Additional information
| Weight | 8 oz |
|---|---|
| Dimensions | 4.51 × 0.5 × 3.9 in |
| Part Number | TT231-0600: Transmitter |
| Configuration | Agility Mobile App, Factory Calibration, USB Configuration, Windows Software Configuration |
| Product Series | TT230 Series |
| Power | Loop Power |
-
Description
TT231: RTD / Resistance Input Two-Wire Transmitter Description
The TT231 model is a space-saving two-wire transmitter that converts a 100 ohm Platinum RTD sensor input to a proportional 4-20mA signal. Power is received from the output loop current or a DC supply when using a three-wire connection.
The transmitter provides sensor excitation plus performs linearization, lead-wire compensation, and lead-break detection.
Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software.
Advanced signal processing capabilities, variable range input, and convenient USB programming make this instrument a very versatile temperature measurement device.
These transmitters can withstand harsh industrial environments and operate reliably across a wide temperature range with very low drift. They feature RFI, EMI, ESD, EFT, and surge protection plus low radiated emissions.
Learn more about the TT Series of Isolated Transmitters and view all models >
TT231: RTD / Resistance Input Two-Wire Transmitter Performance Specifications
IMPORTANT: To prevent damage or errors from grounded PCs and surges, Acromag strongly recommends the use of their USB-ISOLATOR when configuring a TT230 Series transmitter.
USB Interface
USB Connector: USB Mini-B type socket, 5-pin.
USB Data Rate: 12Mbps. USB v1.1 and 2.0 compatible.
USB Transient Protection: Transient voltage suppression on power and data lines.
USB Cable Length: 5.0 meters maximum.
Driver: Not required. Uses built-in Human Interface Device (HID) USB drivers of the Windows operating system.
Input
Default Configuration: 100Ω Pt RTD, α=0.00385 Ω/Ω/°C, 0-200°C input, 4-20mA output, upscale break detection.
Input Configuration: Two-, three- or four-wire sensor input connections.
Input Ranges
100 ohm Platinum RTD, alpha = 375-393, 385 (default), -50 to 850°C (-58 to 1562°F)
0 to 900 ohms linear resistance
Programs in °C, °F, or ohmic integer values only.Zero Adjust
RTD 3/4 wire: -50, -17.78, or 0°C (-58, 0, 32°F).
RTD 2 wire: 0°C (32°F) fixed.
RES: 0 or 100 ohms.Full-Scale Adjust:
RTD: up to 850°C (1562°F), 50°C (58°F) span minimum.
Resistance: up to 900 ohms, 8 ohm span minimum.Excitation Current: 0.5mA, nominal, each ± lead.
Lead-Wire Compensation: 25 ohms per lead.
Lead Break (Sensor Burnout) Detection: Configurable for either upscale or downscale.
Input Filter Bandwidth: -3dB at 700Hz, typical, normal mode filter.
Output
Output Range: 4 to 20mA DC.
Under-scale limit adjustable for 2.1 to 3.6mA, nominal.
Over-scale limit adjustable for 21 to 30mA, nominal.Output Fault Limits (Sensor Fault): 0.4mA below selected under-scale threshold and 1.0mA above over-scale threshold, typical.
Output Compliance
Rload = (Vsupply – 8.6V) / 0.020A.
Rload = 0 to 750 ohms @ 24V DC.Output Accuracy: Better than ±0.1% of span, typical for spans less than 500°C. Includes the effects of repeat-ability, terminal point conformity, and linearization, but does not include sensor error.
Ambient Temperature Effect: Better than ±0.008% per °C of input span or ±80ppm/°C, typical. Includes the combined effects of zero and span drift over temperature.
Output Response Time (for step input change): 500μS, typical with 250 ohm load (to reach 98% of final output value).
Environmental
Operating temperature: -40 to 80°C (-40° to 176°F).
Storage temperature: -40 to 85°C (-40 to 185°F).
Relative humidity: 5 to 95% non-condensing.
Power Requirement: 9-32V DC SELV (Safety Extra Low Voltage), 30mA max.
Shock and Vibration Immunity
Vibration: 4g, per IEC 60068-2-6
Shock: 25g, per IEC 60068-2-27Electromagnetic Compatibility (EMC) Compliance
Radiated Emissions: BS EN 61000-6-4, CISPR 16.
RFI: BS EN 61000-6-2, IEC 61000-4-3.
Conducted RFI: BS EN 61000-6-2, IEC 61000-4-6.
ESD: BS EN 61000-6-2, IEC 61000-4-2.
EFT: BS EN 61000-6-2, IEC 61000-4-4.
Surge Immunity: BS EN 61000-6-2, IEC 61000-4-5.Approvals: CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX / IECEx Zone 2.
Physical
General: General-purpose enclosure designed for mounting on 35mm “T-type” DIN rail.
Case Material: Self-extinguishing polyamide, UL94 V-0 rated, color light gray. General-purpose NEMA Type 1 enclosure.
I/O Connectors: Removable plug-in terminal blocks rated for 12A/250V; AWG #26-12, stranded or solid copper wire.
Dimensions: 12.5 x 114.5 x 99.0 mm (0.5 x 4.51 x 3.90 inches).
Shipping Weight: 0.22 kg (0.5 pounds) packed.
Learn more about the TT Series of Isolated Transmitters and view all models >
-
Features & Benefits
- Easy setup and digital calibration via USB with Windows configuration software
- Flexible RTD or linear resistance input ranges (any 100 ohm Pt RTD with 375-393 alpha)
- Space-saving 12.5mm (0.5 inch) unit with pluggable terminals for convenient wiring
- High accuracy, linearity, stability, and reliability
- Advanced analog signal conditioning ASIC eliminates digitization errors
- Low temperature drift (<80ppm/°C)
- Supports sink or source output wiring
- Programmable over/under-range limits
- Selectable upscale or downscale operation for sensor errors and lead-break detection
- NAMUR-compliant output loop current
- Shock (50g) and vibration (5g) resistant
- Mounts on Type T DIN-rail
- Wide ambient operation (-40 to 80°C)
- CE compliant. UL/cUL Class I Div 2, ATEX / IECEx Zone 2 approvals
-
Tech Papers
The Best Temperature Sensor for Process Control: Thermocouple vs RTD - 8500918 (Log in to view the file)Criteria for Temperature Selection of T/C and RTD Sensor Types This is part three of a comprehensive three-part series that provides information for choosing an industrial temperature sensor from Thermocouple (T/C) and Resistance Temperature Detector (RTD) sensor types. Thermocouple vs RTD Many users simply look to fill the basic needs of their application and do...How to use RTDs for Temperature Measurement - 8500917 (Log in to view the file)Criteria for Temperature Selection of T/C and RTD Sensor Types This is part two of a comprehensive three-part series that provides information for choosing an industrial temperature sensor from Thermocouple (T/C) and Resistance Temperature Detector (RTD) sensor types. The Basics of Temperature Measurement Using RTDs A Resistance Temperature Detector (RTD) is a passive circuit element... -
Specs & Data Sheets
-
Software
-
Accessories
-
TT230-Config/Cal: Calibration Service
- Factory custom configuration/calibration service.
- Specify input type, input/output zero and full-scale values, filtering, and sensor fault settings on order.
Select options -
TTBus-Kit: DIN Rail Bus Power Connector
- One kit supports multiple TT330 series transmitters.
- For multiple DT330/351 or SP330 transmitters, one TTBUS-KIT is required for each transmitter to be DC Power wired via the bus rail power connections.
Select options
-
-
Additional information
Additional information
Weight 8 oz Dimensions 4.51 × 0.5 × 3.9 in Part Number TT231-0600: Transmitter
Configuration Agility Mobile App, Factory Calibration, USB Configuration, Windows Software Configuration
Product Series TT230 Series
Power Loop Power
Please login to submit this form.