1756-L55M12 Product datasheet    

1756-L55M12 Functional Description    

The Allen-Bradley 1756-L55M12 is a high-performance ControlLogix 5555 controller designed to offer enhanced functionality and flexibility. With 750 kbytes of available memory for data and logic, this controller provides ample space for complex automation tasks. It also features 208 kbytes of I/O memory, although it lacks non-volatile memory. Weighing just 0.35 kg (12.5 oz), it has an open-style enclosure type, making it a compact and efficient option for industrial applications.

One of the standout features of the 1756-L55M12 Powerful Processor Module is its support for multiple communication networks, including ControlNet, EtherNet/IP, DH+, DeviceNet, and universal remote I/O. This flexibility allows it to integrate seamlessly into various system architectures. The controller operates with a backplane current of 1.23 A at 5.1V DC and 0.014 A at 24V DC, with a power dissipation of 5.6W and thermal dissipation of 19.1 BTU/hr.

The 1756-L55M12 ControlLogix Logix5555 Processor also boasts impressive durability with an isolation voltage of 30V, ensuring protection against electrical surges. It has been rigorously tested to withstand a 707V DC surge for up to 60 seconds, demonstrating its reliability in demanding environments. Furthermore, the controller supports a lithium battery (1756-BA1) with a weight of 0.59 g, which can be replaced when needed. It’s compatible with the 1756-CP3 and 1747-CP3 serial cables.

This controller operates in temperatures ranging from 0°C to 60°C, with a storage range of -40°C to 85°C. It also tolerates humidity levels from 5% to 95% (non-condensing). With robust shock and vibration ratings—30 g shock during operation and 50 g shock during non-operation—the 1756-L55M12 ensures reliable performance even in harsh conditions. Its design also allows for redundant controller configurations when connected via a ControlNet network.

For power backup, the controller uses the 1756-BA1 lithium battery, and while the battery can be replaced, it is only necessary under specific circumstances. It is compatible with 1756-CP3 and 1747-CP3 programming cables and can be integrated into a redundant controller system, provided both controllers are part of the same ControlNet network. This makes the 1756-L55M13 Powerful Processor Module a highly reliable and flexible controller for demanding industrial applications.