1771-ACN15

The Allen-Bradley 1771-ACN15 is a ControlNet I/O Adapter Module for the 1771 PLC-5 system. It allows communication between the I/O modules in the 1771 chassis and a ControlNet scanner port over a ControlNet network. It has various features such as high-speed data transfer and diagnostic messages. It has a Network Access Port (NAP) through which the user can access the local communication network for programming and maintenance. The 1771-ACN15 module has a communication rate of 5Mbps. It requires a ControlNet PLC-5 controller and must be installed in remote ControlNet chassis. It requires a backplane current of 1A at 5V DC. It has a power dissipation of 5W and thermal dissipation of 17.06 BTU/hr. It must be installed in the leftmost slot of the I/O chassis. Keying bands prevent the wrong module from being inserted in the slot. Keying bands for ControlNet adapter modules are between 54 and 56 on the upper connector and between 16 and 18 on the lower connector. For wiring, a Quad shield RG-6 coaxial cable must be used. The 1771-ACN15 module has one standard BNC connector for cable connection to the module. Two switch assemblies i.e., the ten’s switch and the one’s switch, need to be set to configure the adapter module to the network address ranging from 1-99. For troubleshooting and diagnostics, it has an OK indicator, a status indicator, and an alphanumeric display on the front of the adapter module. It also has a Communication Reset Pushbutton for resetting the module and resuming communication after an error occurs.