AB | 1756-CN2 | ControlLogix Communication Module

The 1756-CN2, which belongs to the 1756-CN2 series, is a powerful PLC communication module that uses the ControlLogix system connections to establish communication links between two or more different devices. Some of the 1756-CN2’s common connections include controller-to-local I/O (also known as local communication module), controller-to-remote I/O (also referred to as remote communication module), controller-to-remote I/O (sometimes referred to as rack-optimized module), and produced as well as consumed tags. This PLC ControlLogix ControlNet Module (with a Dual Capacity Bridge) comes with 100 connections and it is used to bridge ControlNet message links to devices connected on other networks, monitors, as well as controls I/O modules.

The 1756-CN2 provides for high-speed I/O bridge-based functionality when it comes to managing distributed I/O modules and transferring of scheduled data through produced or consumed tags. This module can also execute unscheduled MSG instruction communication-related roles with other devices, ControlNet nodes, and messaging data. Ensure that the 1756-CN2 is operated at the recommended industrial setting, i.e. a temperature of between 0 and 60 degrees Celsius. Plus, this module can operate at an altitude of up to 6562 feet without derating. The 1756-CN2 comes with a standard ControlNet bridge and a communication rate of 5 Mbps. The module can support the primary and secondary as well as I/O chassis of a redundancy system. The 1756-CN2 provides for the ControlNet Network and relies on both the CIP plus P2P network for its high-speed performance. The 1756-CN2 is capable of supporting up to 128 connections featuring 99 redistribution points (known as nodes). The 1756-CN2 comes with a rating of 1100 (mA) at 5.1 Volts DC, Volts DC, 3.0 Amps at 24 Volts DC. The module’s operational power and thermal dissipations are 5.6 Watts and 19.1 BTU/hour, respectively.