DT338: High DC voltage input four-wire dual transmitter
• Dual channels
• ±15V, ±150V inputs
• 0-20mA, ±10V outputs
• 6-32V DC local/bus power
DT330 series signal conditioners provide two independent I/O channels in a single, space-saving unit. The DT338 model is a four-wire dual transmitter that isolates and converts high-level DC voltage inputs to proportional control signals. Each channel supports DC current or voltage output. An optional DIN rail bus can deliver primary or redundant power to multiple units.
High-voltage isolation separates inputs, outputs, and power from each other. Isolation protects from surges, reduces noise, and eliminates 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.
IMPORTANT: To prevent damage or errors from grounded PCs and surges, Acromag strongly recommends use of their USB-ISOLATOR when configuring a DT330 Series transmitter.
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: ±150V, medium filter. Output: 4 to 20mA.
A/D Converters (ADC): Two 24-bit Sigma Delta ADCs (only 16-bits used).
Input Ranges: Path A: ±15V, 0-15V. Path B: ±75V, ±150V, 0-75V 0-150V DC.
Ambient Temperature Effect: Better than ±80ppm/°C (±0.008%/°C).
Scaling Adjust: Full range.
Path A: 500MΩ.
Path B: 1MΩ.
Input Over-Voltage Protection: Bipolar Transient Voltage Suppression (TVS) and diode clamping.
Input Filter: RC filter plus variable digital filter (none, low, med., high).
Input Bandwidth: -3dB @ 34Hz (no filtering).
Common Mode: 100dB no filter (120dB high filter).
Normal Mode: Path A 32dB, Path B 52dB, 60Hz no filter. (>80dB med./high filter).
Output (two channels):
D/A Converters (DAC): Two 16-bit D/A converters.
±10V (±11V maximum).
±5V (±5.5V maximum).
0 to 10V (11V maximum).
0 to 5V (5.5V maximum).
0 to 20mA (24mA maximum).
4 to 20mA (24mA maximum).
Output Accuracy: ±0.05% typical, ±0.1% maximum.
Voltage output: 1K ohms minimum.
Current output: 0-550 ohms.
Output Compliance: 11V, typical.
Output Response Time (for step input change): Time to reach 98% of final output value (typical)
No filter: 25 milliseconds
Low filter: 41 milliseconds
Medium filter: 140 milliseconds
High filter: 1140 milliseconds
Output Ripple: Less than ±0.1% of output span.
Operating Temperature Range
Operation: -40 to 70°C (-40° to 158°F).
Storage: -40 to 85°C (-40 to 185°F).
Relative humidity: 5 to 95% non-condensing.
Power Requirement: 6-32V DC SELV, 1.6W max.
Isolation: 1500V AC peak. 250V AC (354V DC) continuous isolation between inputs, outputs, and power (5-way).
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.
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.
Features & Benefits
- Operate as a dual transmitter, a single transmitter, or a signal splitter
- Easy configuration via USB with Windows software or Agility™ app for Android
- Independently adjustable and scalable input and output ranges
- Selectable high voltage input ranges: ±15V, ±75V, ±150V, 0-15V, 0-75V, 0-150V DC
- Selectable current and voltage output ranges: 0-20mA, 4-20mA, ±5V, ±10V, 0-5V, 0-10V DC
- Supports reverse-acting (inverse) output
- High accuracy, linearity, stability, and reliability
- User-selectable filtering (none, low, med., high)
- Bus power, local power, or both (redundancy)
- Space-saving 17.5mm (0.7 inch) unit with pluggable terminals for convenient wiring
- 1500V input isolation, 5-way, (power/input/output)
- Wide ambient operation (-40 to 70°C)
- CE compliant. UL/cUL Class I Div 2, ATEX/IECEx Zone 2 approvals pending.