The ControlLogix-XT controllers from Allen Bradley, introduced in Australia by Automation Sales , function in the same way as the traditional ControlLogix controllers. However, the ControlLogix-XT products include control and communication system components that, when used with FLEX I/O-XT products, provide a complete control system solution that can be used in environments where temperatures range from -20...70ºC (-4...158ºF).
When used independently, the ControlLogix-XT system can withstand environments where the temperature ranges from -25...70ºC (-13...158ºF).
For added safety and standard benefits, the GuardLogix controller is a ControlLogix controller with safety control. The GuardLogix system is a dual controller solution — a 1756-L6xS primary controller and a 1756-LSP safety partner must be used to achieve SIL 3/CAT. 4. The safety partner controller is part of the system, is automatically configured, and requires no user setup.