GuardLogix safety controllers

With the launch of the (bulletin 1756) GuardLogix controller in 2005, the ControlLogix platform supported both standard and safety system control in the same chassis. The GuardLogix controller system is designed for use in safety applications, including SIL 3 (IEC 61508) and the ISO standard for Safety of Machinery (ISO 13849-1 General Principles for Design and PLe/Cat.4). GuardLogix safety controllers represent an essential piece of a fail-safe (de-energize to trip) solution. Fail-safe refers to a solution that when a fault is detected, all of its outputs are set to zero. And, in the event of a faulty input or input module, it automatically sets any input values associated with them to zero. Both the L6 and L7 controllers are available in the GuardLogix form factor. Physically, the GuardLogix controllers feature a red faceplate and are usually installed in pairs—primary and safety partner controller. The GuardLogix controllers are only supported in Version 18 and higher of RSLogix 5000 and Studio 5000 Logix Designer.