TT231: RTD / Resistance Input Two-Wire Transmitter
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
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.
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): 500ÎĽS, 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. II 3 G Ex nA IIC T4 Gc -40°C < Ta < +80°C.
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.
- 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
-
20RM-16-DIN: 19” rack-mount kit with DIN rail
- 19" rack-mount kit with DIN rail
$185Select options -
PS5R: Slim Line Power Supplies
- 10W, 15W, 30W, 60W, 90W, 120W, and 240W models
- Universal Input (85-264V AC / 100-370V DC)
- Lightweight and compact size
$95 – $245Select options -
USB Isolator
- USB-powered, USB 2.0 and 1.1 compatible
- 1500V AC / 2100V DC isolation
- No drivers required
$110Select 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 | Local Power, Loop Power |
-
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.
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): 500ÎĽS, 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. II 3 G Ex nA IIC T4 Gc -40°C < Ta < +80°C.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.
-
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
Temperature Measurement Select the Best Temperature Sensor for Process Control Applications White Paper (Log in to view the file)How to Select the Best Temperature Sensor for Process Control Applications White Paper Thermocouples versus Resistance Temperature Detectors Many users simply look to fill the basic needs of their application and do not worry much about their choice of temperature sensing technology. That is, they will make a selection based simply on temperature range and...Temperature Measurement Using RTDs White Paper (Log in to view the file)The Basics of Temperature Measurement Using RTDs Temperature reigns as the most often measured process parameter in industry. Most industrial applications require that a temperature be measured remotely, and that this signal be transmitted some distance. An industrial transmitter is commonly used to amplify, isolate, and convert the low-level sensor signal to a high level... -
Specs & Data Sheets
-
Software
TT230 Series Windows Configuration Software (Log in to download the file) -
Accessories
-
20RM-16-DIN: 19” rack-mount kit with DIN rail
- 19" rack-mount kit with DIN rail
$185Select options -
PS5R: Slim Line Power Supplies
- 10W, 15W, 30W, 60W, 90W, 120W, and 240W models
- Universal Input (85-264V AC / 100-370V DC)
- Lightweight and compact size
$95 – $245Select options -
USB Isolator
- USB-powered, USB 2.0 and 1.1 compatible
- 1500V AC / 2100V DC isolation
- No drivers required
$110Select 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 Local Power, Loop Power
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