Product Description

The SPW481 is a high-availability AC power supply module engineered for Yokogawa industrial controller platforms. It converts a standard 100–120 V AC input into regulated DC power for internal logic and communication buses. As a “-53” suffix variant, this model is optimized for harsh environments, incorporating enhanced environmental protection and an extended operating temperature range. This makes it particularly suitable for demanding Field Control Station installations where standard power modules may not provide sufficient durability.

Technical Specifications

Industrial Durability Features

The SPW481-53 is engineered for long-term operation in chemically aggressive and thermally unstable environments. ISA G3-level conformal coating protects internal circuitry from corrosive gases and moisture commonly present in petrochemical plants, wastewater treatment facilities, and outdoor control cabinets. Its extended temperature range enables reliable operation in non-air-conditioned enclosures and field-mounted control panels where ambient conditions may fluctuate significantly.

Technical Questions & Answers

Q: What does the “-53” suffix indicate for the SPW481 series?
A: The “-53” suffix denotes a standard (non-explosion-proof) module that includes G3-compliant conformal coating and certification for extended high-temperature operation.

Q: Is the SPW481-53 suitable for mission-critical redundant systems?
A: Yes. When installed as a redundant pair in a compatible base unit, the SPW481-53 supports zero-downtime operation. If one module fails or loses input power, the remaining unit immediately assumes the full load without impacting controller logic or communications.