What Is Fail Safe Plc. PC-based distributed controller solution for fail-safe applications. Filament type indicating lamps have limited life.
Additional Safe Functions are possible with manufacturer-specific bits. The fundamental difference with a general purpose PLC is summed up in one wordDiagnosis. Safety PLC is first with failsafe condition monitoring.
The common design are 1oo2D 2oo3D and 2oo4D.
Therefore a fail-safe system should be designed to default to its safest mode of operation in the case of an open circuit. The goal of fail-safe design is to make a control system as tolerant as possible to likely wiring or component failures. The redundancy can be achieved in many cases by Oring the circuits or paralleling them. It sounds like youre looking for a safety PLC or a programmable safety relay.
