The ABB PS24-EX SA910S is a redundant 24 VDC power supply module for the S900 I/O system. It offers hot-swap functionality and power loss diagnostics for high-availability DCS applications.
The ABB PS24-EX SA910S is a specialized power conversion unit designed for the S900 remote I/O system. This module provides the essential regulated 24 VDC power required for backplane communication and field instrumentation. Because it features a robust design, the unit operates reliably within hazardous industrial areas. It effectively stabilizes fluctuating input voltages to protect sensitive downstream electronics from power surges. Consequently, the PS24-EX ensures continuous data flow between field devices and the central Distributed Control System (DCS).
| Feature | Details |
| Brand | ABB |
| Model Number | PS24-EX SA910S |
| Product Series | S900 I/O System |
| Module Type | Power Supply Module |
| Output Voltage | 24 VDC |
| Input Voltage Range | 19.2 VDC to 32 VDC |
| Net Weight | 1.14 kg |
| Product Dimensions | 6.6 x 12 x 15.5 cm |
| Country of Origin | Sweden |
The SA910S module supports full redundancy to maximize process uptime in critical environments. When two modules reside on the same baseplate, the system shares the load automatically. If one unit fails, the remaining module assumes the total power demand instantly. Furthermore, the hot-swap capability allows maintenance teams to replace faulty units during live operations. This feature eliminates the need for plant shutdowns during power supply servicing. Thus, the module serves as a cornerstone for high-availability automation architectures.
Moreover, the unit includes an integrated alarm system to detect supply voltage drops. This diagnostic circuit triggers an alert if the input power falls below a safe threshold. By identifying potential issues early, the module prevents unexpected system resets. The power supply also features galvanic isolation to block electrical interference between different system segments. This protection remains vital for maintaining signal accuracy in complex instrumentation loops.
ABB optimized the PS24-EX for space-constrained control cabinets and remote terminal units. The module weighs 1.14 kg and utilizes a high-efficiency circuit to minimize heat dissipation. Lower heat generation extends the service life of adjacent I/O modules within the same rack. Additionally, the standard DIN-style mounting ensures a secure mechanical connection in high-vibration settings. Every unit undergoes rigorous Swedish manufacturing tests to comply with global industrial safety standards.
Professional users trust the SA910S for its consistent performance in oil, gas, and chemical processing. The module maintains stable 24 VDC output even under varying load conditions. Furthermore, the terminal interface simplifies power distribution wiring for site engineers. Choosing the genuine ABB PS24-EX ensures full compatibility with the S900 series bus communication protocols.
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