YOKOGAWA DU200-31 – DCV/TC/DI Multi-Signal Input Module | CENTUM VP DCS Platform
Engineering Background
The DU200-31 is a field-proven multi-signal input module engineered for Yokogawa’s CENTUM VP and CS 3000 Distributed Control Systems. Designed to handle simultaneous DC voltage (DCV), thermocouple (TC), and digital input (DI) signals within a single card slot, it eliminates the need for separate I/O modules in mixed-signal environments — reducing panel footprint and wiring complexity on the plant floor.
Product Positioning
Targeted at process automation engineers managing refinery, petrochemical, power generation, and pharmaceutical control loops, the DU200-31 delivers high-accuracy signal conditioning with galvanic isolation and direct integration into the CENTUM VP field control station (FCS) architecture. It is the preferred choice for brownfield upgrades and greenfield DCS projects requiring compact, reliable multi-type input capability.
Complete Technical Specifications
| Parameter | Specification |
|---|---|
| Model Number | DU200-31 |
| Manufacturer | YOKOGAWA Electric Corporation |
| Compatible Platform | CENTUM VP, CS 3000 |
| Module Type | Multi-Signal Input (DCV / TC / DI) |
| Input Signal Types | DC Voltage (DCV), Thermocouple (TC), Digital Input (DI) |
| Number of Input Channels | 16 channels (configurable per signal type) |
| DCV Input Range | ±10 mV to ±10 V (multi-range selectable) |
| TC Input Types | J, K, E, T, R, S, B, N (IEC/JIS standard) |
| DI Logic Level | Dry contact / Voltage input (24 VDC) |
| Isolation | Channel-to-channel galvanic isolation |
| A/D Resolution | 16-bit |
| Accuracy | ±0.1% of full scale (DCV); ±1°C (TC) |
| Scan Cycle | Synchronous with FCS control cycle (min. 100 ms) |
| Power Consumption | ≤ 5 W |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -20°C to +70°C |
| Humidity | 5% to 95% RH (non-condensing) |
| Dimensions (W × H × D) | Conforms to CENTUM VP I/O module standard form factor |
| Weight | Approx. 2,200 g (module + housing) |
| Certifications | CE, UL, CSA (verify with current datasheet) |
| Country of Origin | Japan |
Proven Application Environments
- Oil & Gas Refining: Temperature and flow signal acquisition from thermocouples and transmitters across distillation columns and heat exchangers.
- Petrochemical Plants: Mixed DCV/TC monitoring for reactor temperature profiling and interlock logic via DI channels.
- Power Generation: Turbine and boiler control loops requiring high-accuracy multi-signal input with deterministic scan cycles.
- Pharmaceutical Manufacturing: GMP-compliant process monitoring with isolated channels preventing cross-signal interference.
- Pulp & Paper / Chemical Processing: Brownfield DCS upgrades replacing legacy I/O cards with a single multi-type module.
Engineering Advantages
- Multi-Signal Consolidation: Handles DCV, TC, and DI in one module — reduces spare parts inventory and simplifies cabinet design.
- Galvanic Isolation: Channel-to-channel isolation prevents ground loops and protects the FCS backplane from field-side faults.
- 16-Bit Resolution: High-fidelity signal digitization ensures accurate process variable representation for PID and advanced control strategies.
- Hot-Swap Compatible: Supports online replacement within CENTUM VP redundant FCS configurations without process interruption.
- Seamless CENTUM VP Integration: Plug-and-play recognition by the FCS; no external signal conditioners required.
- Long Service Life: Designed for 24/7 continuous operation in industrial environments with extended MTBF.
System Architecture & Signal Flow
The DU200-31 installs directly into the CENTUM VP I/O nest (field control unit). Field wiring connects to the terminal block on the front face of the module. Internally, each channel passes through an input multiplexer → anti-aliasing filter → 16-bit A/D converter → digital isolation barrier → FCS backplane bus. The FCS reads all channel values synchronously each control cycle, making the data immediately available to function blocks (PID, sequence, calculation) in the control database.
For TC inputs, the module performs automatic cold-junction compensation (CJC) using an onboard reference sensor, eliminating the need for external CJC terminals.
Sourcing & Quality Verification
- All DU200-31 units sourced by Konmask.com are inspected for physical integrity, label authenticity, and firmware version prior to dispatch.
- Original Yokogawa packaging and documentation are preserved where available.
- Traceability records (lot number, inspection date) provided upon request for MRO and spare-parts procurement teams.
- Certificates of conformance (CoC) available for regulated industries (pharmaceutical, nuclear-adjacent).
Procurement Process
- Confirm Compatibility: Verify your CENTUM VP or CS 3000 FCS model and I/O nest revision against the DU200-31 compatibility matrix (available on request).
- Request a Quote: Contact support@konmask.com or call +0086 19859288691 for volume pricing, lead time, and availability confirmation.
- Place Order: Purchase directly via this product page or via PO for corporate accounts.
- Shipping: Standard export packaging; DHL / FedEx international express available. Typical dispatch within 1–3 business days for in-stock units.
- After-Sales Support: Technical assistance for installation, configuration, and CENTUM VP integration provided by our engineering team.
Technical FAQ
Q: Can the DU200-31 be used in a CS 3000 system?
A: Yes. The DU200-31 is compatible with both CENTUM VP and CS 3000 field control stations. Confirm the I/O nest model (AFV10S / AFV20S) before ordering.
Q: How many TC channels can be configured simultaneously?
A: Channel allocation between DCV, TC, and DI is configurable via the CENTUM VP engineering tool (System View). All 16 channels can be assigned as TC if required.
Q: Is cold-junction compensation automatic?
A: Yes. The module includes an onboard CJC sensor. No external compensation terminals are needed.
Q: What is the replacement procedure for a live system?
A: In a redundant FCS configuration, the DU200-31 supports hot-swap replacement. Follow Yokogawa TI 33J01B10-01EN for the correct online replacement procedure.
Q: Do you provide a warranty?
A: Konmask.com provides a 90-day functional warranty on all modules. Extended warranty and exchange programs are available — contact us for details.
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Contact: support@konmask.com | +0086 19859288691
