Allen-Bradley 1756-CN2 ControlLogix Communication Module

The Allen-Bradley 1756-CN2 is a ControlLogix ControlNet bridge module designed to connect a ControlNet network to a Rockwell ControlLogix controller, and it installs in a 1756 ControlLogix chassis in any slot. It provides one ControlNet BNC port for network connectivity, plus a USB 1.1 port for temporary local programming and an RJ45 NAP port for network access. The module supports up to 99 ControlNet nodes and up to 128 Logix communication connections, enabling efficient bridging of ControlNet I/O to the Logix backplane. Power is drawn from a 5.1 VDC supply (typical 1.1 A; about 5.6 W), and the unit weighs roughly 0.26 kg (0.57 lb). The USB port is intended for temporary local programming only and is not designed for permanent connection.