Description

Brief Product Description

The Allen-Bradley 1756-SYNCH is a specialized ControlLogix communication interface that enables precise time coordination and high-speed data broadcasting across multiple chassis. This module provides the critical synchronization required for distributed motion control and coordinated drive systems using low-latency fiber-optic links.

Product Description

Precision Time Coordination and Data Broadcasting

The Allen-Bradley 1756-SYNCH module functions as a high-speed synchronization hub within the ControlLogix platform. By facilitating a shared system time, this module allows multiple controllers located in separate chassis to execute motion commands with microsecond precision. The SynchLink architecture supports a consistent data rate of 5 Mbps, which ensures that time-stamped information and axis data remain synchronized throughout the network. This capability proves essential for complex industrial applications where multi-axis coordination across distributed hardware is mandatory for process integrity.

Optimized High-Speed Data Architecture

Reliability in motion distribution stems from the module’s efficient frame processing. The 1756-SYNCH employs a specialized frame structure consisting of 30 bytes, including 24 bytes dedicated specifically to user data and a 2-byte Cyclic Redundancy Check (CRC) for error detection. Because the module achieves a rapid frame speed of 50 μs, it minimizes transport lag between controllers. Consequently, this high-speed throughput allows for real-time drive coordination. The module draws 1200 mA at 5.1V DC, and its robust design manages a thermal dissipation of 21.2 BTU/hr, ensuring stable operation within a standard 0 to 60°C industrial temperature range.

Flexible Fiber-Optic Connectivity

System designers benefit from the module’s versatile physical layer, which utilizes 200/230 micron HCS (Hard Clad Silica) fiber-optic cabling. This media choice provides inherent immunity to electrical noise and supports long-distance links ranging from 1 to 300 meters. The 1756-SYNCH features two dedicated fiber-optic ports to accommodate various network topologies. Furthermore, the module maintains compatibility with both standard and redundant ControlLogix power supplies, offering the hardware resilience required for high-availability systems. When paired with 1403-CF series cables, the module provides a comprehensive solution for distributed synchronization in demanding manufacturing environments.

Technical Specifications