Yokogawa DX2000 Series Modules: DX2048T-3-4-1

Technical Dossier

Product Details And Specifications

Yokogawa DX2000 Series: Comprehensive Module Range and Technical Overview

The Yokogawa DX2000 series — commercially designated as the DXAdvanced paperless recorder platform — occupies a critical position in global heavy industry instrumentation. Deployed across petrochemical complexes, nuclear power auxiliary systems, offshore oil & gas platforms, pharmaceutical batch processes, and steel mill monitoring networks, the DX2000 series functions as the primary multi-channel data acquisition and recording backbone in facilities where continuous, tamper-evident process data logging is a regulatory and operational requirement. Its architecture supports up to 48 channels of mixed-signal input in a single chassis, with expandable I/O via dedicated plug-in modules. The platform's compliance with 21 CFR Part 11, IEC 61508, and ISA-S5.1 standards has made it the recorder of choice for regulated industries across North America, Europe, and Asia-Pacific.

The Evolution of DX2000 Architecture

The DX2000 platform succeeded Yokogawa's earlier µR series and DR series chart recorders, transitioning from mechanical pen-and-chart mechanisms to fully digital, solid-state acquisition hardware. The first-generation DX1000/DX2000 units introduced in the early 2000s established the core backplane bus architecture: a proprietary high-speed serial bus connecting the CPU module to plug-in I/O cards, with deterministic scan rates down to 100 ms per channel group.

The second-generation revision introduced the DX1000N / DX2000N suffix variants, adding Ethernet 100BASE-TX connectivity, expanded internal flash storage (up to 128 MB), and compatibility with Yokogawa's Daqstation DX software suite for remote monitoring. The DX2048 sub-family — of which the DX2048T-3-4-1 is a primary variant — represents the 48-channel maximum-density configuration, integrating thermocouple, RTD, DC voltage, and DC current inputs on a unified analog front-end.

Compatibility considerations are significant for maintenance engineers: early DX2000 firmware (below v3.xx) does not support MODBUS TCP/IP natively and requires a dedicated DX101 communication module. Modules from the DX1000 sub-family are not cross-compatible with DX2000 backplanes due to differing bus pinout standards. When sourcing replacement modules, the full part number suffix (e.g., -3-4-1) must be verified, as it encodes input type, channel count, and hardware revision.

DX2000 Full Catalog & Functionalities (SKU List)

Analog Input Modules

• DX2048T-3-4-1: 48-ch universal analog input; TC/RTD/mV/V/mA; 100 ms scan; this listing
• DX2048-3-4: 48-ch analog input module; standard voltage/current range; no TC compensation
• DX2030-3-4-1: 30-ch analog input; mixed TC and DC voltage; mid-density chassis
• DX2020-3-4-1: 20-ch analog input; TC/RTD/mV; compact DX2000 sub-chassis
• DX2010-3-4-1: 10-ch analog input; high-accuracy RTD measurement; ±0.05% FS
• DX2048-1-4: 48-ch voltage input only; 1–5 V DC process signal; no thermocouple
• DX2048-2-4: 48-ch current input; 4–20 mA loop-powered; HART-passive compatible

Digital I/O Modules

• DX2048D-3-4: 48-ch digital input; 24 V DC logic; event/alarm status logging
• DX2016DI-1: 16-ch digital input expansion; dry contact and voltage logic
• DX2016DO-1: 16-ch digital output; relay contact; alarm annunciation output
• DX2008DO-1: 8-ch relay output; SPDT 250 V AC / 3 A; process interlock use

CPU / Controller Modules

• DX2048-CPU-1: Main CPU board; 128 MB flash; Ethernet + RS-232C; DX2000 host
• DX2048-CPU-2: Upgraded CPU; dual Ethernet ports; enhanced MODBUS TCP/IP stack

Communication Adapter Modules

• DX101: RS-422/485 MODBUS RTU communication adapter; legacy DX2000 integration
• DX102: Ethernet MODBUS TCP/IP adapter; firmware v2.xx compatibility bridge
• DX104: PROFIBUS DP slave adapter; process network integration for DX2000 series

Power Supply Modules

• DX2048-PSU-1: 100–240 V AC universal power supply; 50/60 Hz; internal redundancy-ready
• DX2048-PSU-DC: 24 V DC input power supply; battery-backed UPS system compatible

Sourcing Hard-to-Find & Obsolete DX2000 Parts

The DX2000 series entered its mature/end-of-active-production phase, with Yokogawa having transitioned its recorder portfolio toward the GX series (SMARTDAC+) platform. However, the installed base of DX2000 units in long-lifecycle industries — nuclear auxiliary systems, refinery historian networks, pharmaceutical batch records — remains substantial, with many facilities operating under 20–30 year asset retention policies that preclude platform migration.

DriveKNMS maintains a dedicated inventory of DX2000 series modules sourced through certified secondary market channels, including decommissioned plant equipment, authorized distributor overstock, and factory-refurbished units. For discontinued part numbers such as the DX2048T-3-4-1, DX101, and DX104 communication adapters, DriveKNMS provides lifecycle extension support including cross-reference verification, firmware version matching, and long-term storage packaging (ESD-safe, nitrogen-purged where applicable). Minimum order quantities are flexible to support single-unit emergency replacement scenarios.

Quality Control for the DX2000 Range

DX2000 analog input modules present specific test challenges due to their multi-input-type front-end design. Each module undergoes the following verification protocol at DriveKNMS:

• Backplane bus continuity test: All edge connector pins verified against Yokogawa DX2000 backplane pinout specification; contact resistance < 50 mΩ per pin.
• Analog front-end calibration check: Each input channel verified at 0%, 25%, 50%, 75%, and 100% of rated input range using a Fluke 724 or equivalent process calibrator; accuracy within ±0.1% FS.
• Thermocouple cold-junction compensation verification: CJC sensor output cross-checked against ambient reference; deviation < ±0.5°C.
• RTD excitation current test: 4-wire RTD measurement verified for correct excitation current (typically 1 mA); lead resistance compensation confirmed active.
• Firmware version audit: Module firmware version logged and matched to customer's existing DX2000 chassis firmware to prevent bus incompatibility.
• 48-hour burn-in soak: Modules operated at rated voltage and 40°C ambient for 48 hours prior to shipment; no parameter drift > 0.05% FS accepted.