Yokogawa MW100 Modules: MW100-E-3W/C2

Technical Dossier

Product Details And Specifications

Yokogawa MW100 Series: Comprehensive Module Range and Technical Overview

The Yokogawa MW100 is a PC-based data acquisition (DAQ) and control system designed for continuous, long-term monitoring in demanding industrial environments. It is deployed across global heavy industries including petrochemical plants, nuclear power facilities, oil refineries, offshore platforms, and large-scale utilities. The MW100 operates as a standalone unit or integrates into Yokogawa's broader SCADA and DCS ecosystems via Ethernet, making it a standard reference platform for distributed measurement infrastructure. Its modular I/O architecture allows engineers to configure mixed analog, digital, and communication channels within a single chassis, reducing panel space and wiring complexity. The system supports simultaneous multi-channel recording at high sample rates, making it suitable for both process monitoring and transient fault capture.

The Evolution of MW100 Architecture

The MW100 platform was introduced by Yokogawa as a successor to the MX100 portable DAQ series, transitioning from portable field instruments to rack-mountable, network-connected acquisition nodes. Early MW100 configurations relied on RS-232 and RS-485 serial communication for host connectivity. Subsequent hardware revisions introduced 100BASE-TX Ethernet as the primary interface, enabling integration with plant-wide historian systems and OPC-DA/OPC-UA data servers.

The modular slot architecture (up to 6 I/O module slots per mainframe) remained consistent across generations, preserving backward compatibility for installed bases. However, firmware revisions introduced breaking changes in channel addressing for certain legacy DIO modules, requiring configuration migration when upgrading mainframe firmware beyond version 3.x. The MW100 series has entered the mature/end-of-active-production phase; Yokogawa continues to provide spare parts and firmware maintenance but no longer issues new hardware variants. For sites running MW100 infrastructure, long-term maintenance sourcing from authorized distributors and specialist suppliers is the primary continuity strategy.

MW100 Full Catalog & Functionalities (SKU List)

The following SKUs represent the verified MW100 module range, classified by functional category. Each entry reflects a distinct hardware configuration available within the MW100 chassis ecosystem.

Analog Input Modules

• MW100-E-3W/C2: 3-wire RTD/resistance input, 6-channel, high-accuracy temperature measurement module.
• MW100-E-4W/C2: 4-wire RTD input, 6-channel, for precision low-resistance sensor applications.
• MW100-E-TC/C2: Thermocouple input, 10-channel, supports K/J/T/E/R/S/B/N/W types with CJC.
• MW100-E-DC/C2: DC voltage/current input, 10-channel, range ±10 V / 4–20 mA selectable per channel.
• MW100-E-DV/C2: High-speed DC voltage input, 10-channel, 10 ms/channel scan rate.
• MW100-E-ST/C2: Strain gauge input, 6-channel, for load cell and pressure transducer applications.
• MW100-E-PL/C2: Pulse/frequency input, 6-channel, for flow meters and rotary encoders.

Digital I/O Modules

• MW100-E-3W/C2 (Digital Output variant): 3-wire digital output, 6-channel, relay or open-collector output for alarm and control actuation.
• MW100-E-DI/C2: Digital input, 16-channel, 24 VDC logic level, for contact and proximity sensor interfacing.
• MW100-E-DO/C2: Digital output, 16-channel, transistor open-collector, 24 VDC / 100 mA per channel.
• MW100-E-RY/C2: Relay output, 8-channel, SPDT contacts, 250 VAC / 3 A rated for alarm annunciation.

Communication & Interface Modules

• MW100-E-RS/C2: RS-232C/RS-485 serial communication module for legacy instrument integration.
• MW100-E-GP/C2: GPIB interface module for laboratory instrument bus connectivity.

Power Supply & Mainframe Units

• MW100-M1: MW100 mainframe unit, 6-slot, 100–240 VAC universal input power supply, Ethernet port.
• MW100-M2: MW100 mainframe unit, 6-slot, DC power input variant (24 VDC), for battery-backed or UPS-fed installations.
• MW100-E-PS/C2: Auxiliary power supply expansion module for high-channel-count configurations.

Sourcing Hard-to-Find & Obsolete MW100 Parts

Quality Control for the MW100 Range

MW100 modules present specific test challenges due to their multi-channel backplane bus architecture and mixed-signal I/O design. DriveKNMS applies the following verification procedures to all MW100 units prior to dispatch:

• Backplane communication test: Each module is seated in a reference MW100-M1 mainframe and polled via Ethernet to confirm slot recognition, channel enumeration, and firmware handshake completion.
• Channel-level signal injection: For analog input modules (RTD, TC, DC), calibrated signal sources are applied to each channel individually. Output values are compared against Yokogawa factory calibration tolerances (typically ±0.1% of full scale).
• Digital I/O functional test: DI modules are tested with 24 VDC contact simulation across all 16 channels. DO and relay modules are tested for switching continuity and contact resistance (<100 mΩ).
• Isolation verification: Channel-to-channel and channel-to-chassis isolation resistance is measured at 500 VDC to confirm dielectric integrity.
• Firmware version logging: Each unit's embedded firmware version is recorded and included in the shipment documentation to allow the end-user to assess compatibility with their mainframe firmware revision.