Product Core Brief
- Model: PW482-10
- Brand: Yokogawa
- Series: ProSafe-PLC / ProSafe-RS Power Supply Module
- Core Function: 200-240V AC input power supply for Yokogawa safety controller racks.
- Product Type: AC Power Supply Module
- Key Specs: 200-240V AC input | Dual-redundant capable | -20°C to 70°C operating range
- Condition: New Original / New Surplus
Key Technical Specifications
- Manufacturer: Yokogawa
- Part Number:
- Module Type: AC Power Supply Module
- System Family: ProSafe-PLC / ProSafe-RS safety system
- Input Voltage: 200-240V AC
- Redundancy: Dual-redundant configuration supported (two identical modules with same suffix code)
- Temperature Range: -20°C to 70°C
- Output: Internal +5V / +24V DC bus for rack and I/O modules
- Status Indicators: PWR, +5V, +24V, CHECK, GND (module-dependent)
- Mounting: DIN-rail / backplane-mounted in Yokogawa safety rack
- Typical Applications: ESD racks, burner management systems, compressor protection, high-voltage AC safety controller power feeds
Product Introduction
The PW482-10 is a Yokogawa 200-240V AC power supply module used in ProSafe-PLC and ProSafe-RS safety systems. It provides regulated internal DC bus power to the controller rack and associated I/O modules, serving as the primary power feed for safety instrumented functions in regions and facilities using high-voltage AC distribution.
Its main advantage is direct compatibility with 200-240V AC cabinets and support for dual-redundant configuration, which eliminates single-point power failure in critical safety racks. For maintenance and procurement teams, this is a direct-fit OEM replacement part that supports existing cause-and-effect documentation, loop checks, and plant acceptance testing.
QA & Testing SOP
Power supply modules are the most critical components in a safety rack—a failed unit can take down the entire node.
- Label and authenticity check: Verify part number, suffix code (-10), serial number, and manufacturing markings against OEM references.
- Visual inspection: Check AC terminal block, backplane connector, housing, fuses, capacitors, and PCB for heat damage, corrosion, or rework.
- AC input test: Apply 200-240V AC on a bench test rack and verify normal power-up sequence with no abnormal noise or heating.
- Output verification: Measure internal +5V and +24V DC bus rails with a Fluke-class multimeter and confirm they remain within specification under load.
- Redundancy check (if applicable): If two units are available, verify dual-redundant operation and failover behavior on a ProSafe test rack.
- ESD-safe packing: Ship in anti-static packaging with terminal and backplane protection, plus label photos for receiving QA.
Installation Pitfalls & Guide
❗ Confirm input voltage before installation. The PW482-10 is rated for 200-240V AC input. Installing it on a 100-120V AC supply will result in undervoltage failure. For 100-120V AC systems, the PW481 series is used instead.
❗ Do not hot-swap without procedure. Removing or inserting a power supply can disturb the safety rack bus and cause an unintended trip. Follow plant MOC and safety system procedures.
❗ Match suffix codes for redundancy. Dual-redundant configuration requires two identical modules with the same suffix code. Mixing different suffixes can cause uneven loading, diagnostic faults, or failed failover.
❗ Verify rack generation compatibility. ProSafe-RS rack generations have different power distribution architectures. Confirm slot position and system version against your cabinet documentation before ordering.
Replacement steps:
- Pre-install: Confirm input voltage, suffix code, rack position, redundancy configuration, and ESD precautions.
- Removal: Follow safety system procedures, isolate AC power if required, label wiring, and remove the module.
- Install: Seat the module firmly, reconnect AC wiring, and verify terminal torque and grounding.
- Power-on test: Restore AC power, check status LEDs, measure DC bus outputs, and confirm rack diagnostics are normal. If redundant, verify failover behavior.
Technical FAQ
Is pricing flexible? Yes. Price depends on condition, stock availability, label completeness, test records, and whether the unit is new original or new surplus. Urgent shutdown replacements can be prioritized.
What warranty is included? Surplus power supply modules usually carry a limited functional warranty, often 30–90 days, unless otherwise agreed. Final terms depend on stock source and customer QA requirements.
Can this replace a PW481-50? No. The PW482-10 is rated for 200-240V AC input, while the PW481-50 is for 100-120V AC input. Substituting the wrong voltage rating will cause operational failure or damage.
Does it support dual-redundant configuration? Yes. The PW482-10 supports dual-redundant operation when two identical modules with the same suffix code are installed. This is a common configuration in high-availability safety racks.
Do you provide test records? We can provide label photos, bench power-up notes, DC output measurements, and packing records. Full load-bank testing or redundancy failover test reports can be arranged if required.
