Product Introduction
The Yokogawa PW481-01 Power Module is a dedicated industrial-grade power supply unit designed to provide stable and regulated electrical power for Yokogawa distributed control systems (DCS), including FCU, FIO Node Units, and Optical ESB Bus Repeater Units.
Engineered for continuous industrial operation, this module ensures reliable energy distribution to CPUs, I/O modules, and communication interfaces, forming a critical backbone for system stability in process automation environments.
Rather than serving as a general-purpose power supply, the PW481-01 is purpose-built for Yokogawa system architectures, ensuring optimized compatibility and long-term operational reliability.
Technical Specifications
| Parameter | Specification |
|---|
| Model | PW481-01 |
| Module Type | Power Supply Module |
| Input Voltage | 100–120 V AC |
| Input Frequency | 50/60 Hz ± 3 Hz |
| Maximum Power Consumption | ~200 VA |
| Output Voltage | System-specific regulated DC rails (e.g., 5 V / 24 V internal distribution) |
| Redundancy Support | Yes (1+1 configuration supported) |
| Compatible Systems | FCU, FIO Node Unit, Optical ESB Bus Repeater |
| Installation Type | Rack-mounted system module |
| Operating Temperature | Typically 0°C to +55°C |
| Cooling Method | Natural convection |
| Dimensions (H×W×D) | ~100 × 100 × 30 mm (varies by frame) |
| Weight | Approx. 1 kg |
| Protection Features | Overvoltage, overcurrent, thermal protection |
System Applications
The PW481-01 is widely deployed in industrial control environments where continuous and stable power is essential:
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Oil & gas production and refining systems
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Petrochemical processing plants
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Power generation control systems
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Large-scale manufacturing automation
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Distributed control system (DCS) cabinets
It is especially important in high-availability architectures where system uptime and power redundancy directly impact operational safety and efficiency.
Technical FAQs
1. What is the main function of the PW481-01?
It supplies regulated internal DC power to Yokogawa control system modules.
2. Can it be used as a general-purpose power supply?
No, it is designed exclusively for Yokogawa system architecture use.
3. What input power does it require?
It operates on 100–120 V AC power supply.
4. Does it support redundancy?
Yes, dual-module redundancy (1+1 configuration) is supported for high reliability systems.
5. What systems is it compatible with?
It is used in FCU, FIO Node Units, and Optical ESB Bus Repeater Units.
6. What happens in case of module failure?
In redundant setups, the backup module automatically maintains system power continuity.
7. Is it suitable for harsh environments?
Yes, it is designed for industrial environments with continuous operation requirements.
8. How is it installed?
It is mounted inside Yokogawa system racks or control cabinets.
9. Does it require active cooling?
No, it uses natural convection cooling.
10. Why is it critical in a DCS system?
Because it ensures stable and uninterrupted power delivery to all control and I/O modules.
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