Product Details
The Yokogawa VM2*D, also cataloged as the VM2D Multipoint I/O Module, operates as a dedicated hardware component for HART-enabled analog signal acquisition and control within CENTUM VP and CS 3000 DCS platforms. It conditions 4-20 mA loop signals and extracts digital field telemetry, routing real-time process data directly across system control station backplanes.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | VM2*D |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 1.36 kg |
| Dimensions | 356 mm x 178 mm x 25 mm |
| Operating Temp | -10 to 55 deg C |
| Power Consumption | 24 VDC |
| I/O Type | Analog (4-20 mA) / HART |
| Redundancy | Dual-redundant capable |
| Calibration Storage | Factory/User-defined non-volatile storage |
4-20 mA HART Loop Protocol and Channel Isolation
The VM2*D facilitates high-precision process control by executing 16-bit analog-to-digital conversion and HART protocol data extraction from smart field instruments. The module architecture incorporates channel-to-channel isolation to suppress electromagnetic interference and prevent common-mode voltage contamination across the backplane. By leveraging integrated cold junction compensation (CJC) for temperature-sensitive signal paths and HART loop protocol connectivity, the module enables real-time diagnostic monitoring of field-mounted sensors. The dual-redundant design ensures synchronized state execution, allowing the system to maintain stable control outputs even during individual module fault events within the DCS control station.
Frequently Asked Questions
Q: Does the VM2D support online hot-swapping?
A: In redundant configurations, the VM2D allows for module replacement without shutting down the entire control station; however, verify the specific DCS rack backplane version and software configuration for safe extraction procedures.
Q: Is the HART protocol active on all analog channels?
A: Yes, the module is engineered to provide simultaneous analog loop control and digital HART data transmission, facilitating device configuration and diagnostic data logging without interrupting the primary control signal.
Q: How is the calibration data stored within the module?
A: The module utilizes non-volatile memory to retain both factory-provided calibration constants and user-defined offsets, ensuring immediate signal accuracy upon power-on or module swapping.
Field Installation Guidelines
- ESD Protection: Always wear a grounded ESD wrist strap before handling the module board to prevent static damage to internal semiconductor devices.
- Rack Seating: Slide the card along the guide rails into the backplane sub-rack slot. Engage retaining fasteners fully to maintain consistent earth ground continuity.
- Shield Grounding: Terminate signal cable shields at a single ground bar location within the panel to suppress ground loop currents across the 4-20 mA loops.
- Separation Restrictions: Maintain physical separation between 24 VDC analog/HART field wiring and AC power cables within cabinet wiring trunks to prevent cross-talk.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding Marshalling Cabinets in Industrial Control Systems Architecture
Industrial control system deployments rely on structured signal distribution to bridge field instrumentation with central processing hardware. A marshalling cabinet serves as the vital intermediate connection point between heavy field home-run multi-pair cables and delicate input/output (I/O) modules housed inside Programmable Logic Controller (PLC) or Distributed Control System (DCS) enclosures. By segregating field cable terminations from control hardware, engineers maintain system flexibility, safeguard controller components, and streamline commissioning workflows.
FAT vs SAT in Industrial Control Systems: Key Differences and Execution Guide
Industrial control system deployment relies on strict verification protocols to guarantee operational safety, system stability, and regulatory compliance. Commissioning complex Programmable Logic Controller (PLC) racks, Distributed Control Systems (DCS), and Safety Instrumented Systems (SIS) requires two critical milestones: the Factory Acceptance Test (FAT) and the Site Acceptance Test (SAT). Both procedures validate that system automation meets design specifications, but they occur at different stages of project execution and target distinct operational risks.
Hub vs Switch vs Router in Industrial Automation Architecture
Modern factory automation relies on reliable industrial networking infrastructure to exchange real-time field data across operational technology systems. Engineers often encounter networking hardware like hubs, switches, and routers when integrating Programmable Logic Controllers, Distributed Control Systems, and SCADA monitoring nodes. Although these devices share physical ports, they operate at different layers of the Open Systems Interconnection reference model and deliver distinct traffic management capabilities.