Description
Product Overview
The YOKOGAWA A2PW503-S0130 S1 is a 24 VDC output power supply unit used with Yokogawa’s N-IO system. The A2PW503 series is designed to provide regulated 24 VDC power for compatible control-system equipment and field-related devices within the specified application range.
Yokogawa’s official specifications identify the A2PW503 as an AC-input power supply with a 100 to 240 VAC, 50/60 Hz input range and a rated 24 VDC, 5 A output. The unit can also be installed in a dual-redundant power configuration, with an output-balance function intended to improve system reliability.
The supplied listing identifies the exact part number as A2PW503-S0130 S1, with a 50/60 Hz frequency rating, Indonesia country of origin, and approximately 3.430 kg listed weight. The listing condition is Used.
Product Summary
YOKOGAWA A2PW503-S0130 S1 is an industrial AC-to-DC power supply unit for Yokogawa N-IO-related installations.
Its primary function is straightforward: accept an AC supply and provide a 24 VDC output for compatible system loads. For maintenance teams working with existing Yokogawa installations, the exact suffix and S1 style should be checked before selecting a replacement.
The A2PW503 is also documented by Yokogawa for use in dual-redundant configurations. This allows two suitable power supply units to be used together where the system design requires increased power-supply availability.
Product Datasheet
| Parameter | Specification |
|---|---|
| Brand | YOKOGAWA |
| Model | A2PW503-S0130 S1 |
| Base Model | A2PW503 |
| Product Type | 24 VDC Output Power Supply Unit |
| System | Yokogawa N-IO |
| Input Voltage | 100–240 VAC |
| Input Voltage Tolerance | 85–264 VAC |
| Input Frequency | 50/60 Hz |
| Maximum Power Consumption | 165 VA |
| Rated Output Voltage | 24 VDC |
| Output Voltage Range | 24 VDC +4% / -6% |
| Rated Output Current | 5 A |
| Typical Efficiency | 90% |
| Typical Power Factor | 90% |
| Output Holdup Time | 90 ms typical |
| Redundant Configuration | Supported |
| Rated Insulation Resistance | ≥50 MΩ at 500 VDC |
| Input/Output Withstand Voltage | 3000 VAC for 1 minute |
| Input/Ground Withstand Voltage | 1500 VAC for 1 minute |
| Official A2PW503 Weight | Approx. 1.4 kg maximum configuration |
| eBay Listed Weight | Approx. 3.430 kg |
| Listing Condition | Used |
| Country of Origin | Indonesia |
The electrical specifications above are for the A2PW503 base model from Yokogawa’s official General Specifications. The eBay listing separately identifies the specific S0130 S1 variant.
Power Supply Function
The A2PW503 converts the incoming AC power into a regulated 24 VDC supply for compatible Yokogawa system equipment.
The official specification gives an input range of 100–240 VAC with an allowable input range of 85–264 VAC. The rated DC output is 24 V at up to 5 A.
This makes the unit suitable for control-system power distribution where a stable 24 VDC source is required.
The power supply also provides approximately 90 ms of typical output holdup time, which helps maintain the DC output during short interruptions of the incoming AC supply.
Redundant Power Configuration
One useful feature of the A2PW503 family is support for dual-redundant installation.
Yokogawa specifies an output-balance function for redundant operation. In a properly engineered installation, two power supply units can share the load and provide additional power-supply availability.
When replacing one unit in a redundant system, do not assume that any 24 VDC industrial power supply can be substituted. The replacement should match the Yokogawa system requirements, wiring, mechanical installation, and redundancy arrangement.
Typical Applications
The A2PW503 series is associated with Yokogawa N-IO installations and is also used with the A2NN30D Node Interface Unit. Yokogawa specifically documents the A2PW503/A2PW504 as 24 VDC output power supplies used with the N-IO system.
Typical maintenance applications include:
- Yokogawa N-IO systems
- CENTUM-related control installations
- Node Interface Unit power supply arrangements
- 24 VDC industrial control power
- Redundant control-system power
- Process automation systems
- Control cabinet replacement
- Plant maintenance and spare-parts inventory
Installation Considerations
Before replacing the power supply, isolate the incoming AC power and verify that the DC output has been safely discharged or isolated.
Check the existing unit against the replacement part number before installation.
Recommended procedure:
- Isolate the incoming power supply.
- Verify the absence of hazardous voltage.
- Record the existing wiring and terminal arrangement.
- Confirm the replacement model and suffix.
- Inspect terminals and connectors.
- Mount the power supply securely.
- Reconnect the AC input and 24 VDC output wiring.
- Confirm protective grounding.
- Restore the AC supply.
- Measure the 24 VDC output.
- Check the connected N-IO equipment for alarms or abnormal indications.
- Verify stable operation under the expected load.
For redundant installations, verify the complete redundant wiring arrangement before energizing the system.
Operating Environment
Yokogawa documentation for the A2PW503 specifies a normal operating ambient temperature of 0 to 60°C for the standard version. Transport and storage conditions are specified separately, with humidity controlled to avoid condensation.
The installation environment should also follow the applicable N-IO system documentation. Yokogawa specifies additional cabinet requirements for installations intended to meet applicable safety and EMC standards.
Avoid installing the unit where excessive heat, moisture, dust, vibration, or poor ventilation could affect power-supply operation.
Maintenance
The A2PW503 does not normally require routine component-level servicing in the field. Maintenance should focus on the surrounding installation and operating condition.
Check periodically for:
- Loose power terminals
- Discoloration around terminals
- Excessive heat
- Dust accumulation
- Damaged wiring
- Abnormal DC output voltage
- System power-supply alarms
- Evidence of moisture or corrosion
- Cooling and cabinet ventilation
If the DC output becomes unstable or falls outside the specified range, remove the unit from service and investigate the power supply and connected load.
Replacement Compatibility
The exact replacement reference should be based on:
A2PW503-S0130 S1
The base A2PW503 specifications should not be used alone to assume that every A2PW503 suffix is mechanically and electrically interchangeable.
Before substitution, compare:
- Complete Yokogawa part number
- S0130 suffix
- S1 style
- Input arrangement
- Output arrangement
- Mounting configuration
- Terminal layout
- N-IO system configuration
- Redundant power arrangement
The A2PW504 is a different member of the family with a 24 VDC input rather than the A2PW503’s AC input, so it should not be treated as a direct replacement without checking the system design.
Inspection Before Shipment
For a used industrial power supply, recommended inspection includes:
Visual Inspection
Check the enclosure, terminals, labels, mounting points, and wiring interfaces for damage, corrosion, contamination, or overheating.
Part Number Verification
Confirm the nameplate shows:
- A2PW503
- S0130
- S1
- Applicable serial or identification number
Electrical Test
Where suitable test equipment is available, verify AC input response and 24 VDC output before shipment.
The output should be checked under an appropriate controlled load rather than relying only on an open-circuit voltage measurement.
Final QC
Record the tested output voltage, physical condition, identification information, and packaging condition.
Use ESD- and electrically protective packaging suitable for international transportation.
Condition
The referenced eBay listing specifies the unit as Used and states that it has been previously used but is fully operational and functions as intended. The listing identifies Yokogawa as the brand and A2PW503-S0130 S1 as the MPN.
For the actual item being supplied, the physical condition should be described according to its inspection results and photographs.
Frequently Asked Questions
What is the YOKOGAWA A2PW503-S0130 S1?
It is a Yokogawa A2PW503-series 24 VDC output power supply unit associated with the N-IO system.
What is the input voltage?
The A2PW503 accepts 100–240 VAC, with an allowable input range of 85–264 VAC.
What is the output?
The rated output is 24 VDC at 5 A.
Does it operate at 50/60 Hz?
Yes. The A2PW503 is specified for 50/60 Hz AC input, and the supplied listing also identifies 50/60 Hz.
Can it be used in a redundant power arrangement?
Yes. Yokogawa specifies dual-redundant installation capability and an output-balance function for the A2PW503/A2PW504 family.
Is A2PW504 a direct replacement?
No direct substitution should be assumed. A2PW504 uses a 24 VDC input, whereas A2PW503 uses AC input. The complete system configuration must be checked before replacement.
What is the condition of the referenced item?
The eBay listing identifies the item as Used.
Search Terms
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