Product Details
The Yokogawa PW302, also cataloged as the PW302 Power Supply Module, operates as a dedicated hardware component for direct AC to DC conversion and regulated voltage bus distribution within Yokogawa FA-M3 control systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PW302 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 3.6 kg (7.9 lb) |
| Dimensions | 102 mm x 279 mm x 254 mm (4.02 in x 11.0 in x 10.0 in) |
| Operating Temp | 0 to 50 deg C |
| Power Consumption | 220 VA at 100 VAC, 220 VA at 220 VAC |
| Input Voltage Range | 100 to 120 VAC or 220 to 240 VAC (+/-10%) |
| Input Current | 2.6 A at 100 VAC, 1.25 A at 220 VAC |
| Output Voltage | +5.1 VDC and +12 VDC |
| Output Voltage Accuracy | +/-5% |
| Output Ripple and Noise | 50 mVp-p (5.1 VDC), 100 mVp-p (12 VDC) |
| Output Current | 20 A for +5.1 VDC, 3 A for +12 VDC |
| Efficiency | Up to 86% |
| Cooling Method | Natural convection |
| Protection Features | Overvoltage, overcurrent, and short circuit protection |
| MTBF | 100,000 hours |
Channel-to-Channel Isolation and 4-20 mA HART Loop Protocol Integration
The PW302 power supply incorporates internal galvanic isolation to separate line-side high-voltage AC inputs from internal low-voltage DC logic buses (+5.1 VDC and +12 VDC). In Yokogawa system sub-racks housing analog modules that process 4-20 mA HART loop protocol signals, high-efficiency regulation limits switching ripple and common-mode noise transfer to the backplane, preserving signal integrity across process control measurement channels.
Frequently Asked Questions
Q: How does the PW302 module maintain thermal dissipation during continuous load execution?
A: The module relies on natural convection cooling; maintaining clear vertical ventilation paths above and below the sub-rack enclosure is required to prevent thermal derating.
Q: What happens if an overcurrent or short-circuit condition occurs on the +5.1 VDC or +12 VDC outputs?
A: Integrated internal protection circuitry triggers automatic output limiting or shutdown to prevent damage to the power supply and backplane components.
Q: Can the PW302 operate directly from a 220-240 VAC supply line without external step-down transformers?
A: Yes, the input circuit accepts nominal input voltages from 100 to 120 VAC or 220 to 240 VAC within a +/-10% tolerance range.
Field Installation Guidelines
- ESD Protection: Always wear a grounded anti-static wrist strap when inserting or removing sub-rack components to prevent static discharge damage to internal electronics.
- AC Input Line Isolation: Ensure main AC power lines are de-energized and verified via a multimeter prior to connecting conductors to the input terminal block.
- Cabinet Earthing: Connect the designated protective earth (PE) grounding terminal directly to the main panel ground bar with a short, low-impedance copper lead.
- Conductor Separation: Route high-voltage AC input wiring in dedicated channels separated from low-voltage DC lines and sensitive measurement cabling.
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.
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