The Allen-Bradley 1756-SYNCH serves as a high-speed fiber-optic communication interface designed specifically for the ControlLogix platform. Its primary purpose involves the precise synchronization of system clocks and the broadcasting of motion data across multiple chassis. By implementing this module, engineers can achieve microsecond-level coordination between independent controllers, which is essential for complex multi-axis motion control and synchronized drive systems.
Electrical and Thermal Characteristics
The 1756-SYNCH is engineered to operate within the standard ControlLogix backplane, drawing power directly from the chassis power supply. While the module provides high-speed processing, it maintains a thermal profile suitable for standard industrial enclosures.
- Backplane Current (5.1V DC): 1200 mA
- Backplane Current (24V DC): 3 mA
- Maximum Power Dissipation: 6.2 Watts
- Thermal Output: 21.2 BTU/hr
- Operating Temperature Range: 0°C to 60°C (32°F to 140°F)
- Shock Resistance: 30g operational peak acceleration
Industrial Reliability and Installation
Since this module often handles critical synchronization tasks, it features a robust design capable of withstanding industrial vibration and electrical noise. It fits into any available slot within a 1756 chassis and remains compatible with both standard and redundant power supply configurations. To ensure optimal signal integrity, the manufacturer recommends utilizing 1403-CF series fiber-optic accessories. Although Rockwell Automation officially transitioned this product to “Discontinued” status in late 2012, it remains a vital component for maintaining legacy high-performance motion systems.
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