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
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