【Daily Question 20090326】--Why do the Ao modules of safety instrumented system (SIS) manufacturers often lack TUV safety certifications?
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What we see is almost all AI, DI, and DO devices that have safety certifications. Why hasn’t the AO passed the safety certification? This post was last edited by wopale3 on 2009-3-27 11:08]
This demand is very low, so the supply is also low? ? Triconex 3805E is an AO Module
General safety does not require any adjustment; as safety measures, things like shutting down the system or switching it fully on or off are usually sufficient.