D2000-Series

Supported Applications

The Omega D2000 Series consists of user-programmable digital transmitters designed for industrial process instrumentation and data acquisition. These modules serve as a sensor-to-serial interface, converting analog input signals into engineering units transmitted via ASCII format to host computers or processors with standard RS-232C or RS-485 ports.

Primary measurement applications include:

• Voltage and current signal conditioning
• Bridge/load cell inputs for pressure, flow, and force measurements
• Pulse and frequency input monitoring
• User-programmable nonlinear transfer functions (square law, root, log, high-order polynomials) via downloadable breakpoints

The encapsulated design allows mounting in virtually any location, including explosion-proof housings and on DIN rails.

Operating Conditions & Performance

D2000 Series modules operate within an ambient temperature range of -25 to 70°C and a storage temperature range of -25 to 85°C. They function in relative humidity from 0 to 95% noncondensing.

Performance specifications vary by input type:

• Voltage Inputs (D21xx): Ranges include ±10 mV, ±100 mV, ±1 V, and ±10 Vdc with 15-bit measurement resolution.
• Current Inputs (D22xx): Supports ranges from ±1 mA to ±1 A dc, including the standard 4 to 20 mA dc loop. Resolution is 0.01% of FS for most ranges and 0.04% of FS for 4-20 mA.
• Bridge Inputs (D25xx): Accepts ±30 mV, ±100 mV spans with excitation options of 5 Vdc or 10 Vdc; accuracy is specified as ±0.05% of FS max.
• Pulse/Frequency Inputs (D26xx): Frequency input range extends from 1 Hz to 20 kHz with an accuracy of ±0.01% of reading, ±0.01 Hz.

The series provides analog input isolation up to 500 VRMS and features continuous self-calibration (autozero & autocalibration) requiring no adjustment. Throughput is rated at 2 samples/sec.

Configuration Options

The D2000 Series offers configurable dimensions across input types, communication protocols, and linearization options:

• Input Types: Voltage (D21xx), Current (D22xx), Bridge/Load Cell (D25xx), Frequency/Pulse (D26xx).
• Communication Interfaces: RS-232C or RS-485. The last digit of the model number denotes the interface: '1' for RS-232C and '2' for RS-485.
• Protocol Options: Standard ASCII format command/response protocol is included; Modbus RTU protocol is available by adding suffix M to the model number at no additional charge.
• Linearization: D2000 modules support up to 23 downloadable breakpoints for user-programmable nonlinear transfer functions, which may be empirically field-programmed via the communications port.
• Digital I/O: Specific models include digital outputs; bridge input modules (D1500/D2500) feature one Digital Output. Voltage and current modules typically offer 1 Digital Input/Event Counter and 2 Digital Outputs, though D2000 specific variant tables focus on analog inputs.
• Power Supply: Requires 10 to 30 Vdc (max power consumption 0.75 W).

Key Product Differences

The D2000 Series is distinguished from the standard D1000 family by its enhanced capability for user-programmable linearization of non-standard sensors. While both series share similar physical dimensions (3.60 in x 2.45 in x 1.1 in) and ABS housing with captive mounting hardware, the D2000 modules are specifically engineered to handle complex transfer functions via downloadable breakpoints.

Model number variations define the specific input range and communication port:

• Voltage Modules (D21xx): Available in 10 mV, 100 mV, 1 V, and 5 V ranges. Note: The D2000 series voltage table lists specific models for these spans.
• Current Modules (D22xx): Configured for ±1 mA, ±10 mA, ±100 mA, ±1 A, or 4 to 20 mA dc inputs.
• Bridge Modules (D25xx): Offered with excitation voltages of either 5 Vdc or 10 Vdc for input spans of 30 mV or 100 mV.
• Pulse/Frequency Modules (D26xx): Distinguish between frequency output data in hertz and pulse/timer inputs with output data in seconds.

All user-selectable options, including channel address, baud rate (300 to 38.4 K), alarms, and linearization breakpoints, are set through the communications port and stored in nonvolatile memory.