Siemens 6ES7960-1FB00-0AA5 Sync Module

High-Speed Redundancy Link for S7-1500H Systems

This synchronization module connects redundant S7-1500H CPUs for fault-tolerant operation. It maintains real-time synchronization between paired controllers. Many critical plants rely on this module for automatic failover and seamless process continuity. The unit ensures data consistency across the high-availability architecture.

Technical Specifications

Parameter	Specification
Model	6ES7960-1FB00-0AA5
Dimensions	70 mm × 100 mm × 20 mm (W × H × D)
Weight	0.15 kg
Power Supply	5 V DC (from backplane)
Power Consumption	0.5 W typical
Synchronization Type	Fiber-optic (dual-channel)
Transmission Medium	Plastic optical fiber (POF)
Cable Length	100 m maximum
Data Rate	10 Mbps
Redundancy Mode	Active-active synchronization
Sync Accuracy	≤ 1 ms
Failover Time	< 100 ms
Status Indicators	2 LED indicators (Sync, Error)
Operating Temperature	0°C to +60°C
Storage Temperature	-40°C to +70°C
Humidity Range	5% to 95% RH (non-condensing)
Protection Class	IP20
Certifications	CE, UL, cULus

Synchronization Architecture and Operation

This module creates a high-speed fiber-optic link between redundant CPUs. It transfers synchronization data continuously to maintain identical states. The active-active mode provides real-time program and data mirroring. This architecture ensures seamless automatic failover during CPU faults.

Communication Link and Performance

The module uses plastic optical fiber for reliable data transmission. The fiber-optic connection provides electrical isolation between CPUs. Sync accuracy of 1 ms maintains tight program consistency. The 10 Mbps data rate ensures minimal synchronization overhead.

Cable and Connection Specifications

The fiber-optic cable supports distances up to 100 meters. This distance allows redundant CPUs to install in separate cabinets. The standard POF interface accepts off-the-shelf fiber cables. Installation follows typical fiber-optic handling practices.

Redundancy and Failover Operation

During normal operation, both CPUs execute identical programs simultaneously. Automatic failover triggers when the active CPU detects a fault. The standby CPU assumes control without process interruption. Failover completes in under 100 milliseconds for minimal disturbance.

Status Indication and Diagnostics

Two LEDs display the module’s operational and synchronization status. The Sync LED confirms active communication with the partner CPU. The Error LED indicates cable or synchronization faults. This visual feedback assists operators and maintenance personnel.

Mechanical Construction and Physical Attributes

This module measures 70 mm wide and weighs just 0.15 kg. The compact form factor fits standard S7-1500 mounting rails. Fiber-optic connectors provide secure and reliable terminations. Installation follows standard SIMATIC hardware practices.

Certifications and Safety Standards

The 6ES7960-1FB00-0AA5 holds CE, UL, and cULus certifications. These approvals confirm compliance with international industrial standards. Each unit undergoes functional testing before shipment. This quality process ensures dependable redundancy performance.