YOKOGAWA SPW481-53

Description

1. Detailed parameter table

YOKOGAWA SPW481-53

2. Product introduction

The YOKOGAWA SPW481-53 is a high-power industrial redundant power supply designed to deliver stable 24V DC power to large-scale automation systems. Unlike the signal-acquiring SNB10D-425/CU2N, this module focuses on providing reliable and redundant power, serving as a critical energy source for control systems, input/output modules, and other industrial equipment (such as the SCP401-11 PLC and SAI533-H33 analog input module).

With a total output current of 50A (25A per channel in dual output mode), the SPW481-53 can efficiently power multiple high-consumption devices simultaneously. It supports both AC and DC input sources, ensuring continuous operation even if one input fails. The module’s high efficiency (≥92%) and tight regulation (±0.5%) guarantee stable voltage output, which is essential for the accurate operation of sensitive components like the SNB10D-425/CU2N. Suitable for industries such as oil and gas, power generation, and large manufacturing plants, the YOKOGAWA SPW481-53 ensures uninterrupted power supply, minimizing downtime and enhancing the reliability of entire automation systems.

3. Core advantages and technical highlights

High-power output with dual-channel redundancy:

Boasting 50A total output (25A per channel), the SPW481-53 can power numerous modules including multiple SNB10D-425/CU2N units, SCP401-11 PLCs, and S2BN5D-121 DO modules in a large plant. In a steel mill’s control system, its dual-channel design allows separate powering of critical safety circuits and non-critical monitoring circuits. If one channel fails, the other continues supplying power, preventing complete system shutdown—a feature far beyond the capabilities of standard non-redundant power supplies.

Wide input range and seamless switching:

Supporting 100-240V AC and 110-300V DC inputs, the SPW481-53 adapts to diverse power sources. In a remote mining operation, it can switch between generator AC power and battery DC power without voltage fluctuations, ensuring the SNB10D-425/CU2N continues monitoring equipment status uninterrupted. This eliminates the need for external transfer switches, simplifying system design and reducing potential failure points.

Precise voltage regulation for sensitive equipment:

With ±0.5% line and load regulation, the SPW481-53 maintains stable 24V DC output even during input voltage swings or load changes. In a semiconductor factory, this stability prevents voltage spikes that could disrupt the SNB10D-425/CU2N’s signal acquisition, ensuring accurate detection of sensor statuses in cleanroom equipment. The low ripple (<50mV) further protects sensitive electronics from interference, extending their lifespan.

Advanced protection mechanisms:

Equipped with comprehensive protection features, including reverse polarity protection and input under-voltage lockout, the SPW481-53 safeguards connected devices. In a chemical plant, if a technician accidentally reverses DC input wiring, the module shuts down gracefully without damaging the SCP401-11 PLC or SNB10D-425/CU2N. Its overtemperature protection with automatic recovery also prevents overheating in enclosed cabinets, a critical advantage in high-temperature industrial environments.

YOKOGAWA SPW481-53

4. Typical application scenarios

In a large oil refinery’s distributed control system, the SPW481-53 provides power to multiple control cabinets, each containing SCP401-11 PLCs, SNB10D-425/CU2N digital input modules, and S2BN5D-121 DO digital output modules. Its 50A output easily handles the total load, while the redundant design ensures that a power supply failure in one cabinet doesn’t affect others. The wide input range allows it to operate on the refinery’s fluctuating AC power or switch to backup DC power during outages, maintaining continuous monitoring of critical processes like distillation and cracking.

In a power generation plant’s turbine control system, the SPW481-53 supplies power to vibration sensors, temperature transmitters, and the SNB10D-425/CU2N modules monitoring their statuses. Its tight voltage regulation ensures that sensor signals remain accurate, even when the plant’s electrical system experiences transients during load changes. The redundant configuration means that if one power supply unit fails, the other seamlessly takes over, preventing turbine shutdowns that could cost millions in lost production.

In an automotive manufacturing plant’s paint shop, the SPW481-53 powers the SCP401-11 PLCs controlling the robotic painting arms, along with SNB10D-425/CU2N modules tracking arm positions and door interlocks. The module’s resistance to electromagnetic interference from high-voltage painting equipment ensures stable power delivery, while its efficiency reduces heat output in the temperature-controlled paint booth environment. The 1+1 redundancy provides peace of mind, knowing that a power supply issue won’t halt the entire production line.

5. Related model recommendations

• SPW481-33: A 30A variant of the SPW481-53for medium-sized systems, offering the same redundancy features but with lower current output, ideal for applications with fewer modules.
• SNB10D-425/CU2N: The digital input module powered by the SPW481-53, relying on its stable power to accurately collect status signals from field devices.
• SCP401-11: The central PLC that depends on the SPW481-53‘s reliable power supply for consistent operation and coordination of automation systems.
• RBPW-02: The redundancy bypass module compatible with the SPW481-53, enabling hot-swap of power supply units without interrupting power to connected equipment.
• SAI533-H33: The analog input module that, like the SNB10D-425/CU2N, benefits from the SPW481-53‘s stable power to ensure accurate analog signal acquisition.
• PW482-10 S2: A smaller dual-input power supply that can be used alongside the SPW481-53to power auxiliary equipment, complementing its high-power output with flexible power distribution.

6. Installation, commissioning and maintenance instructions

Installation preparation

Before installing the SPW481-53, ensure the mounting location has at least 200mm clearance for ventilation, with ambient temperature between -10°C and 70°C. Prepare tools including a torque wrench (3-5Nm), cable lugs, and a multimeter with current measurement capability.

Verify input voltage compatibility (100-240V AC or 110-300V DC) and install appropriate circuit breakers (30A for AC, 20A for DC). Use 10mm² cables for output connections to handle 50A current, with separate wiring for each output channel. In redundant configurations, connect two SPW481-53 units to the RBPW-02 module, ensuring input sources are independent (e.g., separate AC circuits or AC/DC mix) for maximum redundancy. Ground the unit using a 6mm² wire connected to the cabinet’s protective earth terminal.

Maintenance suggestions

Perform monthly visual inspections of the SPW481-53 to check for loose connections, dust accumulation, or fan blockages. Clean ventilation grilles with compressed air quarterly to maintain cooling efficiency. Monitor output voltage and current weekly using a precision multimeter, ensuring voltage remains within 24V ±0.5% and current doesn’t exceed 50A total.

Check status indicators daily: green LEDs indicate normal operation, while red LEDs signal faults (e.g., overcurrent, overtemperature). Use the built-in diagnostic port to log fault history and identify recurring issues, such as frequent overcurrent events that may indicate a problem with connected modules (like a shorted SNB10D-425/CU2N).

Test redundancy 切换 quarterly by disconnecting one unit in a redundant pair and confirming the other continues supplying power without interruption. Replace fans annually as preventive maintenance, and calibrate current monitoring circuits every two years to ensure accurate load measurements.

7. Service and guarantee commitment

YOKOGAWA provides a 5-year warranty for the SPW481-53, ensuring reliability in critical power supply applications. Each unit undergoes rigorous testing, including 10,000-hour full-load operation, temperature cycling, and input transient testing, to meet strict industrial standards.

Our technical support team includes power system specialists offering 24/7 assistance for installation, redundancy configuration, and troubleshooting. On-site support for critical failures is available within 24 hours in major industrial regions, with emergency loaner units to minimize downtime.

YOKOGAWA offers detailed application notes on integrating the SPW481-53 with other modules like the SNB10D-425/CU2N and SCP401-11, along with training programs on redundant power system design and maintenance. Extended warranty options include annual preventive maintenance visits, ensuring the power supply remains in optimal condition throughout its lifespan.