Overview
The Yokogawa PW482, also cataloged as the PW482 Power Supply Module, operates as a dedicated hardware component for AC power conversion and system power distribution within Yokogawa CENTUM VP Field Control Units, FIO Node Units, and Optical ESB Bus Repeater Units. The module accepts 220 to 240 VAC input power and supports installation in P1 and P2 slots for single or redundant power configurations.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | PW482 |
| Brand | Yokogawa |
| Product Type | AC Input Power Supply Module |
| Origin | Japan |
| Input Power Voltage | 220 to 240 VAC, +/- 10% |
| Input Frequency | 50/60 Hz, +/- 3 Hz |
| Maximum Power Consumption | 230 VA |
| Input/Output Interface | Proprietary backplane connector |
| Compatible Units | Field Control Units, FIO Node Units, Optical ESB Bus Repeater Units |
| Module Slot | P1 or P2 |
| Redundancy Configuration | Single module or dual-module configuration |
| Weight | Approx. 1.0 kg |
| Power Consumption | Maximum 230 VA |
Process Control and DCS Integration
The PW482 supports the power architecture used by Yokogawa process control hardware. Its proprietary connector provides direct electrical connection to the associated equipment backplane without external signal wiring for the power interface.
In redundant configurations, two identical PW482 modules can be installed in slots P1 and P2. This arrangement supports continued system power availability through the hardware redundancy architecture of the compatible Yokogawa unit.
Yokogawa DCS platforms commonly interface with process instrumentation through technologies such as 4-20 mA loops, HART communication, and fieldbus networks. The PW482 does not directly process these field signals; instead, it supplies power to the control hardware responsible for signal acquisition, processing, and communication.
Frequently Asked Questions
Q: Can the Yokogawa PW482 operate as a single power supply module?
A: Yes. The PW482 supports single-module installation. Compatible hardware can also use two identical PW482 modules in P1 and P2 slots for a redundant power configuration.
Q: What input voltage does the PW482 require?
A: The module accepts 220 to 240 VAC input power with a specified tolerance of +/- 10%. The rated input frequency is 50/60 Hz with a tolerance of +/- 3 Hz.
Q: Does the PW482 directly process 4-20 mA or HART signals?
A: No. The PW482 functions as a power supply module. Signal processing depends on the I/O and control modules installed in the associated Yokogawa system.
Field Installation Guidelines
- Verify that the external AC supply matches the specified 220 to 240 VAC input range before installation.
- Isolate incoming power according to site electrical safety procedures before inserting or removing the module.
- Install the PW482 only in the designated power supply slot of compatible Yokogawa hardware.
- For redundant operation, install two identical PW482 modules in the designated P1 and P2 positions.
- Inspect the proprietary connector and module seating surfaces before installation. Do not force the module into the backplane.
- Route AC power wiring separately from low-level analog and communication cables where practical.
- Follow the grounding and shielding requirements specified for the complete Yokogawa control cabinet.
- Confirm correct module engagement and system power status after installation.
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