Single-Phase AC/DC Power Supplies for Smart Factory Automation

Apr 3, 2026
Industrial control cabinet with DIN rail power supplies from RECOM
Smart factory automation in the edge-computing era is markedly different. It demands significantly more distributed and centralized computing power, together with far stricter power requirements. Today’s smart factories — from programmable logic controllers (PLCs) and motion controllers to sensor networks, distributed I/O modules, and edge-AI systems — all depend on reliable, compact, regulated DC power delivery. Large machinery usually handles its own AC/DC conversion, but the many distributed intelligent components throughout a smart factory do not. This is exactly where single-phase DIN rail power supplies play a critical role.

Table of Contents

Smart Factory Automation in the Edge-Computing Era

Modern smart factories are designed with advanced automation and AI from the outset, while legacy sites are being retrofitted with intelligent sensors, high-performance edge processors, and real-time communication systems. These upgrades dramatically increase the number of low-voltage DC-powered devices spread across the plant. Single-phase DIN rail power supplies provide the ideal solution: they convert readily available factory AC into stable, regulated DC exactly where it is needed — close to the load.

DIN Rail System for Smart Factory Power Delivery

RECOM DIN rail power supply in smart factory control cabinet
Fig. 1: The DIN rail system is designed for easy mounting of industrial electronic equipment.
The DIN rail system is the industry-standard mounting platform for industrial control equipment. The system offers fast, tool-free installation, reliable operation, and straightforward maintenance.

In a typical smart-factory control cabinet, single-phase AC enters via conduit and is distributed to multiple DIN rail power supplies. Each supply provides regulated DC directly to local devices or via conduits to remote loads. Smart factories commonly use several DIN rail panels to achieve true point-of-load power distribution.

Typical Smart Factory Automation Applications

  • Programmable logic controllers (PLCs) remain the backbone of automation, controlling conveyors, actuators, robotics, and entire machine sequences. They require clean, regulated DC.
  • Motion controllers demand precise, stable power for high-accuracy positioning and speed control.
  • Sensor networks and distributed I/O have proliferated thanks to digital monitoring; almost every process variable now has sensors that need reliable low-voltage DC.
  • Edge-AI systems are now common, driving up local power loads and making an uninterrupted, high-quality DC supply even more critical.

Power Requirements in Smart Factory Automation

While traditional industrial equipment often ran directly on single-phase AC (230V/50Hz or 120V/60Hz), today’s smart-factory devices increasingly rely on regulated low-voltage DC for sensitive electronics, processors, and communication interfaces. Power demands range from a few watts for basic sensors up to tens or hundreds of watts for edge computing and motor control. Designers must address:

  • Multiple distributed point-of-load DC supplies
  • Rising power consumption from AI/edge processing
  • Avoidance of voltage sag and overheating in legacy distribution systems
  • Effective heat management inside cabinets
  • Reliable isolation, monitoring, and easy maintenance

Single-phase AC/DC DIN rail supplies solve these challenges elegantly: single-phase power is widely available, simpler and less costly to install than three-phase, and allows compact, modular deployment right next to the loads.

Reliable and Compact Power Delivery for Smart Factories

RECOM DIN rail mounted RACPRO1-S series
Fig. 2: RECOM single-phase DIN rail power supplies – RACPRO1-S series
RECOM’s single-phase DIN rail AC/DC power supplies are engineered specifically for the demands of smart factory automation. They accept universal single-phase AC and deliver tightly regulated DC with high reliability, even under fluctuating input conditions and demanding thermal environments.

The RACPRO1-S family offers slim, high-performance single-phase DIN rail supplies optimized for harsh industrial and smart-factory conditions.

Key features:
  • Universal input: 85–277VAC (tolerant of voltage sags worldwide)
  • Slim DIN-rail IP20 design with 25° push-in connectors
  • 150% boost power for 5 seconds (ideal for motor inrush and inductive loads)
  • Full power from –40°C to +60°C with convection cooling only (above +60 with derating)
  • Safety: IEC/EN/UL 61010-1 & 61010-2-201
  • Emissions: EN 61000-6-4 Class B
  • Immunity: EN 61000-6-2

Model series Dimensions Power (W) DC out options, Nominal/(adj range) Current (A)
RACPRO1-S120 100 x 112 x 28mm 120 12/(12-15), 24/(24-29), 48/(48-56) 8, 5, 2.5
RACPRO1-S240 125 x 139 x 39mm 240 24/(24-29) 10
RACPRO1-S240E 125 x 139 x 39mm 240 12/(12-15), 24/(24-29), 48/(48-56) 15, 10, 5
RACPRO1-S480 135 x 155 x 52mm 480 24/(24-29), 48/(48-56) 20, 10

Conclusion

In smart factory automation, the power delivery system is every bit as important as the computing and control technology. Choosing the right DC supplies, placing them close to the loads, and ensuring long-term reliability directly determines uptime, efficiency, and scalability.

RECOM’s single-phase RACPRO1-S DIN rail power supplies offer a proven, flexible, and highly reliable way to distribute clean low-voltage DC exactly where today’s intelligent automation systems need it — from PLCs and motion control to sensor networks and edge-AI processors. They combine slim design, universal input, high surge capability, wide temperature range, and easy installation — forming the solid foundation for a future-proof smart factory power architecture.

Applications
  Series
1 RECOM | RACPRO1-S120 Series | AC/DC, DIN-Rail, 120W, Single Output
Focus New
  • Smallest 120W DIN Rail PSU in the market
  • Highest Power Density up to 500W/liter
  • Slim Design (28mm) with 25° Push-In connectors
  • DC-Input Range 88-370VDC
2 RECOM | RACPRO1-S240 Series | AC/DC, DIN-Rail, 240W, Single Output
Focus New
  • Slim Design (39mm) with 25° Push-In connectors
  • Active Power Factor Correction >0.95
  • Active Inrush Current Limit
  • DC-Input Range 88-370VDC
3 RECOM | RACPRO1-S240E Series | AC/DC, DIN-Rail, 240W, Single Output
Focus New
  • Slim Design (39mm) with 25° Push-In connectors
  • Active Inrush Current Limit
  • Split AC-Input 85V to 132VAC & 170V to 277VAC
  • Highest Efficiency up to 94%
4 RECOM | RACPRO1-S480 Series | AC/DC, DIN-Rail, 480W, Single Output
Focus New
  • Slim Design (52mm) with 25° Push-In connectors
  • Active Power Factor Correction 0.95
  • Active Inrush Current Limit
  • DC-Input Range 88-370VDC