Product Overview

The 6ES7960-1AA00-0XA0 is a specialized fiber-optic synchronization submodule engineered for the Siemens SIMATIC S7-400H high-availability controller series. This vital component is inserted directly into the synchronization slots of redundant CPU pairs (such as the CPU 412-5H, 414-5H, or 417-5H) to establish a high-speed data link. Its primary function is to facilitate the "event-driven synchronization" of the two processing units, ensuring that both controllers maintain an identical internal status. In the event of a hardware failure in the primary CPU, this module enables a bumpless, millisecond-fast switchover to the backup unit, preventing process interruptions and maintaining total system integrity.

Core Hardware Parameters and Interface Specs

• Module Designation: IF 960-HF Sync Submodule

• System Architecture: Exclusive to SIMATIC S7-400H Fault-Tolerant systems

• Transmission Medium: Fiber optic link (supports patch cables up to 10m)

• Data Throughput: High-speed deterministic synchronization of process images and internal bit memories

• Redundancy Support: Enables Hot Standby functionality for redundant pairs

• Dimensions: 25 x 102 x 76 mm (Compact internal plug-in design)

• Unit Mass: 0.05 kg (Net module weight; shipping weight approx. 0.95 kg)

• Origin: Made in Germany

• Protection: Integrated EMI shielding for operation in high-voltage industrial environments

High-Availability Industrial Applications

• Continuous Process Industries: Utilized in chemical plants and oil refineries to ensure that control logic never halts, preventing hazardous conditions or massive production losses during CPU maintenance.

• Energy and Power Utilities: Deployed in power plant control systems where a master-to-slave transition must be instantaneous to maintain grid stability.

• Automotive Assembly Lines: Guarantees that complex robotic coordination remains synchronized, avoiding mechanical collisions in the event of a controller fault.

• Critical Infrastructure: Essential for tunnel ventilation, water treatment facilities, and airport baggage handling systems where 24/7 uptime is a mandatory safety requirement.

• Marine and Offshore: Integrated into ship-borne automation where the harsh environment necessitates redundant hardware and rapid error recovery.