The 1756-L82EXT Controller is a ControlLogix-XT controller manufactured by Allen Bradley as a member of the ControlLogix-XT Controllers product line. These controllers and the standard ControlLogix controllers work in a similar way. The ControlLogix-XT series controllers are intended for machine controlling and for communication system components and they are conformally coated for protection when they are exposed to hazardous and corrosive environments. The Allen-Bradley 1756-L82EXT Controller can tolerate temperatures ranging from -20 to 70 degrees Celsius when it is used with the Flex I/O-XT devices. On the other hand, when this device is used independently, it can tolerate a -25 to 70 degrees Celsius temperature range. This unit can handle 32 controller tasks and 1000 programs per task. Other notable features and specifications of this ControlLogix-XT controller include built-in communication ports which are 1 USB port and an embedded Ethernet port.

The Allen-Bradley 1756-L82EXT ControlLogix-XT Controller has multiple communication options including the DeviceNet, Data Highway Plus, Ethernet, Remote I/O, and SynchLink communication networks. It also supports different programming languages like the Structured Text, Relay Ladder Logic, Sequential Function, and Function Block Diagram programming languages. The 1756-L82EXT Controller has a user memory capacity of 5 MB, and 2 GB of optional nonvolatile memory. It operates on a current draw of 5 milliamps at 1.2 Volts DC and 1.20 Amps at 5.1 Volts DC. It has a thermal dissipation rating of 21.2 BTU per hour and a power dissipation rating of 6.2 Watts. It also features a vibration rating of 2 g at 10 to 500 Hertz, and a shock rating of 30 g.