Technical Overview
The Yokogawa MRI-234*B serves as a high-efficiency power supply module for the CENTUM VP and ProSafe-RS distributed control systems. This module converts 100-240 VAC input into stable DC power for backplane distribution to connected I/O cards. Its compact design supports rack-mounted installations, while the extended operating temperature range ensures reliable performance in harsh environments. The MRI-234*B also integrates comprehensive protection features, including overvoltage, overcurrent, and short-circuit safeguards.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Yokogawa Electric Corporation |
| Product Type | Power Supply Module |
| System Compatibility | CENTUM VP, ProSafe-RS |
| Input Voltage | 100-240 VAC |
| Input Frequency | 50/60 Hz |
| Output Voltage | 5 VDC (primary), 24 VDC (secondary) |
| Output Current | 5 A (primary) / 2 A (secondary) |
| Efficiency | ≥ 85% |
| Power Dissipation | 30 W (typical) |
| Inrush Current | ≤ 15 A (at 240 VAC) |
| Hold-up Time | 20 ms (at full load) |
| Protection Features | Overvoltage, overcurrent, short-circuit |
| Dimensions (H x W x D) | 130 x 40 x 120 mm |
| Weight | 0.55 kg |
| Operating Temperature | -10°C to +60°C |
| Storage Temperature | -20°C to +75°C |
| Protection Class | IP20 |
| Certifications | CE, CSA, UL |
Power Conversion and Efficiency
The Yokogawa MRI-234*B delivers stable DC outputs to power system components and field instruments reliably. Its high efficiency minimizes heat generation, reducing cooling requirements within the control cabinet. Furthermore, the 20 ms hold-up time ensures continuous operation during brief input power interruptions, preventing system resets or data loss.
Protection and Diagnostic Features
This module incorporates comprehensive protection mechanisms including overvoltage, overcurrent, and short-circuit safeguards. The MRI-234*B automatically shuts down or limits output under fault conditions, protecting both the module and connected equipment. Diagnostic LEDs provide immediate visual feedback for input power status, output health, and fault conditions.
Integration and Physical Characteristics
The MRI-234*B mounts directly into standard CENTUM VP and ProSafe-RS chassis, simplifying system assembly and maintenance. Its compact dimensions allow efficient space utilization in control cabinets, and the lightweight construction facilitates handling during installation. With its rugged design and extended temperature tolerance, the MRI-234*B suits demanding applications in the oil, gas, and chemical industries.
Details
| Weight | 0.55 kg |
|---|---|
| Dimensions | 130 × 40 × 120 mm |
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