DT230 series signal conditioners provide two independent I/O channels in a single, space-saving unit. The DT233 model is a dual two-wire transmitter that isolates and converts millivolt or thermocouple sensor inputs to proportional 4-20mA control signals. Power is received from the output loop current. High-voltage isolation separates all input and output circuits from each other. Isolation protects from surges, reduces noise, and helps eliminate ground loop errors. Setup and calibration are fast and easy with a convenient USB connection to your PC and Acromag’s Windows configuration software. The Android app enables setup with mobile devices. Advanced signal processing capabilities, variable range input/output, and convenient USB programming make this instrument very versatile. 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 ground loop error between a grounded PC and a grounded input signal, Acromag strongly recommends use of a USB isolator like Acromag’s USB-Isolator when configuring a DT230 Series transmitter.

USB Interface

USB Connection Type: USB Mini-B type socket, 5-pin Data Rate: 12Mbps. USB v1.1 and 2.0 compatible Maximum cable length: 5.0 meters Transient voltage suppression on power and data lines. USB Driver: Not required. Uses built-in Human Interface Device (HID) USB drivers of the Windows operating system.

Input (two channels)

Default Configuration/Calibration Input: TC J, -210 to 760°C, medium filter Output: 4 to 20mA, upscale break detect A/D Converters (ADC): Two 24-bit Sigma Delta ADCs (only 16-bits used) Input Ranges Input                         Range                                     Accuracy TC J         -210 to 760°C (-346 to 1400°F)             ±0.5°C TC K        -200 to 1372°C (-328 to 2502°F)           ±0.5°C TC T        -260 to 400°C (-436 to 752°F)                ±0.5°C TC R          -50 to 1768°C (-58 to 3214°F)              ±1.0°C TC S           -50 to 1768°C (-58 to 3214°F)             ±1.0°C TC E        -200 to 1000°C (-328 to 1832°F)           ±0.5°C TC B          260 to 1820°C (500 to 3308°F)            ±1.0°C TC N        -230 to -170°C (-382 to -274°F)             ±1.0°C TC N        -230 to -1300°C (-274 to 2372°F           ±0.5°C mV            -100 to 100mV                                            ±0.05% Thermocouple Reference (Cold Junction Compensation): ±0.2°C typical, ±0.5°C maximum at 25°C Ambient Temperature Effect: Better than ±80ppm/°C (±0.008%/°C) Scaling Adjust: 0 to 110% of nominal range Lead Break (Sensor Burnout) Detection: Upscale/downscale Input Impedance: 15M ohms Input Over-Voltage Protection: Bipolar Transient Voltage Suppression (TVS) and diode clamping Input Filter: RC filter plus variable digital filter (none, low, medium, high) Noise Rejection (@ 60Hz): Common Mode: 100dB no filter (135dB high filter) Normal Mode: 0.5dB no filter (>80dB high filter)

Output (two channels)

D/A Converters (DAC): Two 16-bit D/A converters Output Ranges: 4-20mA DC 3.5-24mA under/over-range capability Output Accuracy: ±0.05%, typical. ±0.1%, maximum Output Compliance: Rload = (Vsupply - 7V) / 0.020A Rload = 0 to 850 ohms @ 24V DC Output Response Time (for step input change) Time to reach 98% of output value (typical) No filtering               14 milliseconds Low filter                  47 milliseconds Medium filter        156 milliseconds High filter             1154 milliseconds Output Ripple: Less than ±0.1% of output span

Environmental

Operating temperature Operation: -40 to 80°C (-40° to 176°F) Storage: -40 to 85°C (-40 to 185°F) Relative humidity: 5 to 95% non-condensing Power Requirement: Loop-powered, 7-32V DC SELV, 24mA max Isolation: 1500V AC peak. 250V AC (354V DC) continuous isolation between input and output circuits Shock and Vibration Immunity: Vibration: 4g, per IEC 60068-2-6 Shock: 25g, per IEC 60068-2-27 Approvals (pending) CE compliant. Designed for UL/cUL Class I Division 2 Groups ABCD, ATEX / IECEx Zone 2 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

Physical

General: General-purpose enclosure designed for mounting on 35mm “T-type” DIN rail Case Material: Self-extinguishing polyamide, UL94 V-0 rated 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) Unit weight: 0.16 kg (0.35 pounds) Shipping Weight: 0.22 kg (0.5 pounds) packed

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    TTC-SIP: Software

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