Yokogawa PW484-10 S1 Power Supply Module
The Yokogawa PW484-10 S1, also cataloged as the PW484-10 Power Supply Module, operates as a dedicated hardware component for stable 24 VDC distribution and internal backplane bus communication execution within CENTUM VP, CENTUM CS 3000, and ProSafe-RS control chassis platforms.
Suffix Breakdown & Model Matrix
- Base Model (PW484): Standard Yokogawa System Power Supply Module architecture designed for FCU and FIO node units.
- Suffix (-10): Standard 24 VDC input voltage specification variant.
- Style Code (S1): First-generation hardware revision designator indicating specific internal circuit component revisions and firmware baselines.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PW484-10 S1 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 1 kg |
| Dimensions | Standard Yokogawa chassis slot width |
| Operating Temp | 0 to 55 deg C |
| Input Voltage | 24 VDC nominal (19.2 VDC to 30 VDC range) |
| Current Consumption | 5.5 A maximum draw |
| Efficiency | >85% typical |
| Output Function | Powers up to 15 ProSafe-RS / FIO modules |
| Redundancy | Dual redundant (N+1) support, hot-swappable |
| Protection | Overvoltage, undervoltage, overcurrent, short-circuit |
| Safety / Compliance | IEC 61508 SIL 3 capable |
Cold Junction Compensation & Channel Isolation Dynamics
The PW484-10 S1 incorporates channel-to-channel galvanic isolation across its internal power conversion circuitry to prevent ground loops from propagating to sensitive field I/O subsystems and optical ESB bus repeater units. The module maintains stable DC bus voltage regulation under variable dynamic loads, preserving accurate reference junctions when field I/O subsystems execute cold junction compensation (CJC) for connected thermocouple circuits and analog 4-20 mA HART loops.
Frequently Asked Questions
Q: Can the PW484-10 S1 module be installed in any standard slot within the chassis?
A: No, the module requires installation specifically into designated power supply slots P1 or P2 within the FCU or FIO Node Unit to correctly interface with the internal backplane power bus.
Q: Is hot-swapping supported when replacing a faulty power module?
A: Yes, hot-swapping is supported provided the chassis is operating in a dual-redundant (N+1) power configuration and the adjacent slot maintains an identical online PW484-10 S1 module.
Q: What grounding procedure must be observed during installation?
A: Secure the chassis frame ground directly to the master station instrument earth. Ensure shield ground drain wires from field loops do not return through the module's 24 VDC input terminal block.
Field Installation Guidelines
- Power Off Verification: Confirm input 24 VDC power feed lines are de-energized prior to wiring or terminal connection unless operating within a validated hot-swap procedure under redundant configuration.
- Slot Placement: Insert the module firmly into slot P1 or P2 along the chassis guide rails until the rear backplane connectors seat completely. Tighten upper and lower retaining screws to 0.5 N m torque.
- Redundancy Matching: Verify both power supply slots contain identical PW484-10 S1 units with matching style codes to ensure balanced load sharing.
- Terminal Wiring & Grounding: Connect 24 VDC power conductors to designated screw terminals. Maintain a dedicated ground wire from the chassis ground terminal to the system protective earth bus using minimum 2.5 mm2 (12 AWG) copper wire.
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