TT351: Strain Gauge Input Four-Wire Transmitter
Product short description:
- Strain gauge/load cell input
- Universal current/voltage output
- 9-32V DC local/bus power
The TT351 model is a space-saving four-wire transmitter that converts a four or six wire strain gauge bridge or load cell or milliVolt sensor signal to an isolated voltage or current output signal.
Click here to watch a short AcroMaggie video highlighting the TT351 features.
- Description
- Features & Benefits
- Tech Papers
- Specs & Data Sheets
- Software
- Accessories
- Additional information
The TT351 model is a space-saving four-wire transmitter that converts a four or six wire strain gauge bridge or load cell or milliVolt sensor signal to an isolated voltage or current output signal. An optional DIN rail bus can deliver primary or redundant power to multiple units.
Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software.
The transmitter’s input circuit allows true 6-wire bridge measurement and includes an adjustable bridge excitation supply (4 to 11V DC) with a remote sense feature. Sense wires ensure the programmed excitation voltage is measured at the sensor and enable lead-wire compensation. The differential input performs true ratiometric conversions for extremely stable measurements that remain accurate over time and temperature.
Advanced signal processing capabilities, variable range input, and convenient USB programming make this instrument a very versatile strain/load 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 use of their USB-ISOLATOR when configuring a TT350 Series transmitter.
USB Interface
USB Connector:
Type: USB Mini-B type socket, 5-pin.
Data rate: 12Mbps. USB v1.1 and 2.0 compatible.
Maximum cable length: 5.0 meters.
USB Transient Protection: Transient voltage suppression on power and data lines.
Driver: Not required. Uses Windows HID drivers.
General Input
Analog to Digital Converter (ADC): 24-bit S-D A/D converter.
Resolution: Varies from 13.5 to 20.5 bits per filter and gain selection.
Input Reference Test Conditions: Strain gauge/mV; Excitation = 10V; Rated Output = 1mV/V; Range = ±10mV; Ambient Temperature = 25°C; Power Supply = 24V DC.
Accuracy (overall input to output): Better than ±0.1% of span, typical. This value does not include sensor errors.
Ambient Temperature Effect: Better than 0.008% of input span per °C (±80ppm/°C).
Noise Rejection:
Normal mode @ 60Hz: -19dB (no filter), -34dB (low filter), >80dB (med/high filter).
Common mode @ 60Hz: -136dB, typical with 100 ohm input unbalance.
Input Overvoltage Protection: Bipolar Transient Voltage Suppressors (TVS).
Bridge Input
Input Types: Select from basic load cell, two quarter-bridge options, two half-bridge options, three full-bridge options, or milliVolts.
Input Span/Range: Bipolar input range is determined from the ± product of the gauge’s rated output and the nominal excitation selection (2mV/V x 10V = ±20mV range).
Input Over-range: The actual input range is up to (user-specified) ±150% of the range obtained via the ± product of the gauge’s rated output and the nominal excitation applied.
Input Sensitivity: Accepts gauge rated outputs up to 1mV/V to 10mV/V. The range of your input signal is the ± product of the excitation voltage and your gauge’s rated output.
Input Impedance: ±IN at 15M ohms, ±SEN at 73.2K ohms, typical
Input Lead Resistance:
Module has sufficient overdrive to guarantee 10V bridge excitation with 5 ohms/lead and 100mA of internal excitation current.
Larger lead resistances may limit the maximum achievable internal bridge excitation.
Input Bridge Excitation (Internal)
Adjustable from 4V to 11V, 120mA maximum. Internal excitation must be turned OFF before external excitation supply connection.
Input Bridge Excitation (External)
4V to 11V. The internal excitation must be turned OFF for connection to an external excitation supply.
Digital (Trigger) Input
Input Type: “Active High” input, 100ms minimum.
15-30V DC (6.65K ohms) See connection diagram.
Operation (Tare/Alarm Modes): The trigger function is set for “Auto-Tare” mode by default.
Output (DC V/mA)
D/A Converter: 16-bit
Current Output
Ranges: 0-20mA, 4-20mA
Compliance: 10V minimum (525 ohm load)
Voltage Output
Ranges: 0-5V, ±5V, 0-10V, ±10V
Compliance: 10mA maximum with short circuit protection. 1 ohm output impedance
Output Response Time to 98% (for step input change)
No filter: 264ms. Medium filter: 472ms
Low filter: 292ms. High filter: 2547ms
Environmental
Operating Temperature: -40 to 70°C (-40° to 158°F)
Storage Temperature: -40 to 85°C (-40 to 185°F)
Relative humidity: 5 to 95% non-condensing
Power Requirement:
Supply |  Ptot  | Current Draw
9VÂ Â Â Â Â | 3.05W | 339mA Max.
12VÂ Â Â Â | 3.05W | 254mA Max.
15VÂ Â Â Â | 3.05W | 203mA Max.
24VÂ Â Â | 3.05W | 127mA Max.
32VÂ Â Â | 3.05W | 95mA Max.
Isolation: 4-way (input/output/trigger/power). Input/excitation, analog output, trigger, and power circuits are isolated from each other for up to 1500V AC for 60 seconds or 250V AC continuous.
Shock and Vibration Immunity:
Vibration: 4g
Shock: 25g
Approvals:
CE compliant. UL/cUL listed Class I Division 2 Groups ABCD. ATEX, IECEx certified 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: 17.5 x 114.5 x 99.0 mm (0.7 x 4.51 x 3.90 inches)
Shipping Weight: 0.22 kg (0.5 pounds) packed
- Easy setup and digital calibration via USB withWindows® configuration software or AgilityTM appfor Android® devices
- Flexible SG Bridge, Load Cell, or mV Input
- Digitally Adjustable Sensor Excitation
- Space-saving 17.5mm (0.7 inch) unit withpluggable terminals for convenient wiring
- High accuracy, linearity, stability, and reliability
- Remote Sense and measurement of BridgeExcitation Vex
- Ratio-Metric Input Measurement of Sensor Vo
- Optional Automatic Null-Compensation/Zero-Balance of Bridge Output Vo
- User-specified input over-range limiting
- Bus power, local power, or both
- Redundant power ready (rail/local)
- Separate voltage & current output terminals
- Shock (25g) and vibration (4g) resistant
- Wide ambient operation (-40 to 70°C)
- CE compliant. UL/cUL Class I Div 2,ATEX/IECEx Zone 2 approvals
Specifications
Manuals
TT351 User Manual (Log in to download the file)
-
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 -
TTBus-Kit: DIN Rail Bus Power Connector
- One kit supports multiple SP Series Splitters or DT and TT Series transmitters.
$30Select options -
TTC-SIP: Software
- Software Interface Package for Acromag DT, ST, TT Series Transmitters and SP, uBSP Series Signal Splitters.
- Includes configuration sofware CD-ROM (5040-xxx), isolator (USB-ISOLATOR) and two USB cable (4001-112, 4001-113) (Recommend one kit per customer.)
- Easy setup and digital calibration via USB with Windows configuration software.
- Download the configuration software only - from the Software Tab
$170Select 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 | 1 × .5 × 4 in |
Part Number | TT351-0700: Bridge input. CE, cULus. |
Product Series | TT350 Series |
Power | Bus Power, Local Power |
-
Description
The TT351 model is a space-saving four-wire transmitter that converts a four or six wire strain gauge bridge or load cell or milliVolt sensor signal to an isolated voltage or current output signal. An optional DIN rail bus can deliver primary or redundant power to multiple units.
Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software.
The transmitter’s input circuit allows true 6-wire bridge measurement and includes an adjustable bridge excitation supply (4 to 11V DC) with a remote sense feature. Sense wires ensure the programmed excitation voltage is measured at the sensor and enable lead-wire compensation. The differential input performs true ratiometric conversions for extremely stable measurements that remain accurate over time and temperature.
Advanced signal processing capabilities, variable range input, and convenient USB programming make this instrument a very versatile strain/load 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 use of their USB-ISOLATOR when configuring a TT350 Series transmitter.
USB Interface
USB Connector:
Type: USB Mini-B type socket, 5-pin.
Data rate: 12Mbps. USB v1.1 and 2.0 compatible.
Maximum cable length: 5.0 meters.USB Transient Protection: Transient voltage suppression on power and data lines.
Driver: Not required. Uses Windows HID drivers.
General Input
Analog to Digital Converter (ADC): 24-bit S-D A/D converter.
Resolution: Varies from 13.5 to 20.5 bits per filter and gain selection.
Input Reference Test Conditions: Strain gauge/mV; Excitation = 10V; Rated Output = 1mV/V; Range = ±10mV; Ambient Temperature = 25°C; Power Supply = 24V DC.
Accuracy (overall input to output): Better than ±0.1% of span, typical. This value does not include sensor errors.
Ambient Temperature Effect: Better than 0.008% of input span per °C (±80ppm/°C).
Noise Rejection:
Normal mode @ 60Hz: -19dB (no filter), -34dB (low filter), >80dB (med/high filter).
Common mode @ 60Hz: -136dB, typical with 100 ohm input unbalance.Input Overvoltage Protection: Bipolar Transient Voltage Suppressors (TVS).
Bridge Input
Input Types: Select from basic load cell, two quarter-bridge options, two half-bridge options, three full-bridge options, or milliVolts.
Input Span/Range: Bipolar input range is determined from the ± product of the gauge’s rated output and the nominal excitation selection (2mV/V x 10V = ±20mV range).
Input Over-range: The actual input range is up to (user-specified) ±150% of the range obtained via the ± product of the gauge’s rated output and the nominal excitation applied.
Input Sensitivity: Accepts gauge rated outputs up to 1mV/V to 10mV/V. The range of your input signal is the ± product of the excitation voltage and your gauge’s rated output.
Input Impedance: ±IN at 15M ohms, ±SEN at 73.2K ohms, typical
Input Lead Resistance:
Module has sufficient overdrive to guarantee 10V bridge excitation with 5 ohms/lead and 100mA of internal excitation current.
Larger lead resistances may limit the maximum achievable internal bridge excitation.Input Bridge Excitation (Internal)
Adjustable from 4V to 11V, 120mA maximum. Internal excitation must be turned OFF before external excitation supply connection.Input Bridge Excitation (External)
4V to 11V. The internal excitation must be turned OFF for connection to an external excitation supply.Digital (Trigger) Input
Input Type: “Active High” input, 100ms minimum.
15-30V DC (6.65K ohms) See connection diagram.
Operation (Tare/Alarm Modes): The trigger function is set for “Auto-Tare” mode by default.
Output (DC V/mA)
D/A Converter: 16-bit
Current Output
Ranges: 0-20mA, 4-20mA
Compliance: 10V minimum (525 ohm load)Voltage Output
Ranges: 0-5V, ±5V, 0-10V, ±10V
Compliance: 10mA maximum with short circuit protection. 1 ohm output impedanceOutput Response Time to 98% (for step input change)
No filter: 264ms. Medium filter: 472ms
Low filter: 292ms. High filter: 2547msEnvironmental
Operating Temperature: -40 to 70°C (-40° to 158°F)
Storage Temperature: -40 to 85°C (-40 to 185°F)
Relative humidity: 5 to 95% non-condensing
Power Requirement:
Supply |  Ptot  | Current Draw
9VÂ Â Â Â Â | 3.05W | 339mA Max.
12VÂ Â Â Â | 3.05W | 254mA Max.
15VÂ Â Â Â | 3.05W | 203mA Max.
24VÂ Â Â | 3.05W | 127mA Max.
32VÂ Â Â | 3.05W | 95mA Max.Isolation: 4-way (input/output/trigger/power). Input/excitation, analog output, trigger, and power circuits are isolated from each other for up to 1500V AC for 60 seconds or 250V AC continuous.
Shock and Vibration Immunity:
Vibration: 4g
Shock: 25gApprovals:
CE compliant. UL/cUL listed Class I Division 2 Groups ABCD. ATEX, IECEx certified Zone 2
II 3 G Ex nA IIC T4 Gc -40°C < Ta < +80°CPhysical
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: 17.5 x 114.5 x 99.0 mm (0.7 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 withWindows® configuration software or AgilityTM appfor Android® devices
- Flexible SG Bridge, Load Cell, or mV Input
- Digitally Adjustable Sensor Excitation
- Space-saving 17.5mm (0.7 inch) unit withpluggable terminals for convenient wiring
- High accuracy, linearity, stability, and reliability
- Remote Sense and measurement of BridgeExcitation Vex
- Ratio-Metric Input Measurement of Sensor Vo
- Optional Automatic Null-Compensation/Zero-Balance of Bridge Output Vo
- User-specified input over-range limiting
- Bus power, local power, or both
- Redundant power ready (rail/local)
- Separate voltage & current output terminals
- Shock (25g) and vibration (4g) resistant
- Wide ambient operation (-40 to 70°C)
- CE compliant. UL/cUL Class I Div 2,ATEX/IECEx Zone 2 approvals
-
Tech Papers
Strain and Strain Measurement an Introduction White Paper (Log in to view the file)Introduction to Strain & Strain Measurement This paper covers the topic of strain gauge & load cell input transmitters and strain and load measurement as related to Acromag strain modules and transmitters, but may be extended to other strain gauge or load cell instruments. -
Specs & Data Sheets
Specifications
Manuals
TT351 User Manual (Log in to download the file)
-
Software
-
Accessories
-
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 -
TTBus-Kit: DIN Rail Bus Power Connector
- One kit supports multiple SP Series Splitters or DT and TT Series transmitters.
$30Select options -
TTC-SIP: Software
- Software Interface Package for Acromag DT, ST, TT Series Transmitters and SP, uBSP Series Signal Splitters.
- Includes configuration sofware CD-ROM (5040-xxx), isolator (USB-ISOLATOR) and two USB cable (4001-112, 4001-113) (Recommend one kit per customer.)
- Easy setup and digital calibration via USB with Windows configuration software.
- Download the configuration software only - from the Software Tab
$170Select 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 1 × .5 × 4 in Part Number TT351-0700: Bridge input. CE, cULus.
Product Series TT350 Series
Power Bus Power, Local Power
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