Product Overview

The ABB PS24-EX SA910S is a high-integrity power supply module purpose-built for the S900 I/O station architecture. Operating as a core energy regulator within Distributed Control Systems (DCS), this module provides stabilized 24V DC power to the I/O backplane and connected field instrumentation. It is specifically engineered for high-availability environments where downtime is not an option. By integrating advanced filtration and regulation circuitry, the PS24-EX ensures that sensitive automation components are protected from voltage spikes and grid instability, maintaining the functional safety and data accuracy of the entire control loop.

Core Hardware Parameters and Physical Data

• Module Function Stabilized Power Supply

• Model Identifier PS24-EX

• System Designation SA910S

• Product Family S900 I/O Series

• Input Voltage Tolerance 19.2 V DC to 32 V DC

• Output Voltage 24 V DC Nominal

• Maintenance Feature Hot-Swap Capability (Live Replacement)

• Redundancy Support Dual-module redundant configuration possible

• Unit Mass 1.14 kg

• Casing Dimensions 6.6cm x 12cm x 15.5cm

• Manufacturing Origin Sweden

• System Integration Compatible with Ethernet Router and DCS gateways

Industrial Deployment and Sector Applications

This power module is primarily utilized in sectors requiring intrinsically safe or high-reliability signal processing, such as offshore oil and gas platforms, chemical refineries, and pharmaceutical manufacturing. Its hot-swap design allows maintenance teams to replace modules during active operations without de-energizing the rack, which is vital for continuous process industries. The SA910S is often deployed in redundant pairs to provide a failsafe power architecture; if one module detects a supply loss, the secondary unit assumes the load instantaneously. This level of reliability, combined with integrated alarm monitoring, makes the PS24-EX a standard component for critical infrastructure where power continuity directly impacts safety and productivity.

FAQ

Q: Can the PS24-EX SA910S be replaced while the system is under load?

A: Yes, this module features a full hot-swap capability, allowing for removal and insertion into the SA910 backplane without interrupting the power supply to the S900 I/O modules or field devices.

Q: What happens if the input voltage falls below 19.2V DC?

A: The module is designed with an integrated alarm system that triggers upon power loss or significant voltage drops, allowing the DCS to log the event and switch to redundant power sources if available.

Q: Is this power supply suitable for hazardous area installations?

A: The PS24-EX is part of the S900 I/O range, which is frequently used in explosion-proof or hazardous zone applications. However, you should verify the specific ATEX or IECEx certifications on the product label for your specific zone.

Q: How does the redundancy feature work with the SA910S baseplate?

A: When two PS24-EX modules are installed on a compatible redundant baseplate, they share the load or operate in a leader-follower configuration, ensuring the I/O rack remains powered even during a single-unit failure.

Q: Does the unit require specialized software configuration?

A: No, the PS24-EX is a hardware-level power component. Once seated in the S900 rack, it begins automatic voltage regulation, though status monitoring can be integrated into the DCS via the communication interface.