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.
| Parameter | Specification |
|---|---|
| Model | VM2*D |
| Brand | YOKOGAWA |
| Origin | Japan |
| Weight | 1.36 kg |
| Dimensions | 356 × 178 × 25 mm |
| Operating Temp | -10 deg C to +55 deg C |
| Power Consumption | 24 V DC |
| I/O Type | Analog (4-20 mA) / HART |
| Redundancy | Dual-redundant capable |
| Calibration | Factory/User-defined storage |
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.
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.
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