Description
1. At-A-Glance Executive Brief
- Model: PW701
- Brand: Yokogawa
- Part Type: Power Supply Module
- System Compatibility: CENTUM CS/VP and ProSafe-RS Systems
- Lifecycle Status: Legacy System Support / Active Migration
- Weight: ~2.0 kg
2. Technical Introduction
Unexpected voltage sags or thermal degradation in legacy power distribution hardware frequently compromise controller availability in continuous process facilities. Technicians troubleshooting sudden rack shutdowns often trace failures back to aging electrolytic capacitors inside unmonitored power supplies operating near their thermal limits.
The Yokogawa PW701 resolves this reliability bottleneck by delivering regulated power directly to field control stations and associated I/O racks. Engineered for high MTBF requirements, this unit maintains stable output delivery under fluctuating plant loads while supporting redundant configurations to prevent single-point-of-failure trips in safety-critical applications.
3. Core Technical Specifications
| Parameter | Value |
| Manufacturer | Yokogawa |
| Product Type | Power Supply Module |
| Input Voltage | 100–120 V AC (50/60 Hz) |
| Input Current | 4.0 A max |
| Output Voltage & Current | DC +5.1V at 29A |
| Total Output Power | 147.9 W |
| System Compatibility | CENTUM CS/VP, ProSafe-RS |
| Configuration | Redundancy-ready support |
| Operating Temperature | -10°C to +50°C |
4. Field Engineer’s Tech Notes
- Heat Dissipation and Spacing: Maintain adequate vertical clearance above and below the power supply rack. Because the unit handles heavy continuous current loads, restricted airflow accelerates electrolytic capacitor dry-out and shortens the operational lifespan of the module.
- Redundant Load Balancing: When deploying dual PW701 units in a redundant configuration, periodically measure the current-sharing balance on the diagnostic terminals. An uneven load draw typically indicates a failing diode or a voltage calibration drift on one of the paired modules.
5. Adaptive QA & Testing Protocol
Every pre-owned or New Surplus PW701 unit undergoes dynamic load testing prior to warehouse dispatch. Our engineering bench applies a variable 100-120V AC input via an isolation transformer while ramping electronic DC loads up to the 29A threshold on the 5.1V output rail. We monitor ripple voltage under full load, verify thermal stability over a 4-hour burn-in cycle, and check the fault alarm relay contact closure. Complete test sheets and video verification are available upon request to plant engineering teams.
6. Buyer’s FAQ
- What warranty is provided with this power supply module?All units include a 12-month replacement warranty covering component failure under standard industrial operating conditions.
- Are these parts supplied as New Surplus or used?We stock both factory-sealed New Surplus (NSFP) and fully refurbished, bench-tested units. Condition status is explicitly confirmed prior to order processing.
- How quickly can an emergency replacement ship to site?In-stock units ship same-day via priority air freight couriers to minimize downtime during unplanned outages.
- Is this unit compatible with older CENTUM revisions?The PW701 is designed for specific CENTUM CS/VP and ProSafe-RS hardware revisions. Verify your cabinet’s backplane style code and current draw requirements before installation.
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