It seems that for digital signals, the system needs to decide whether to use a passive or an active approach
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When it comes to digital signals entering the system, is it better to use passive or active types? Please share your opinions. This post was last edited by XJTZWKDPJ on 2007-12-7 19:23]
I think the choice should be made based on design requirements.:lol
Agree with the opinion above; choose according to needs
Passive is good, both in terms of security and reliability!
Passive is generally chosen. It mainly allows for the isolation of on-site interference. Or to prevent on-site failures from causing high voltage to burn out the circuit boards.
For digital signals entering the system, passive signals are much safer for the system. Generally, this is determined by the design; if active signals are required on-site while the system outputs passive signals, relays have to be used, which makes things more complicated. In some cases, digital signal isolators are also necessary. In practice, the design usually calls for passive signals to be used when entering the system.
Passive signals are better as they can provide isolation. The system checks passive signals, and a DC voltage of 48V is relatively reliable.
Based on what we encounter in practice, passive signals are almost always used, with the aim of isolating the system and ensuring safety and reliability.
Thank you all. The people from the design institute also concluded that a passive solution would be the best option for me