Newbie seeking help to understand this safety barrier
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Is this a safety barrier that operates in one-in-two-out mode? 1 and 2: What are the two wiring sections for? How to connect a three-wire instrument? What does HHC in the picture mean? I’m not understanding it yet; please give me some guidance, seniors
Yes, a safety barrier with one entry and two exits； 1/2 is the terminal for connecting to the HHC communicator.
(￣o￣) . z Z
Terminals 3 and 4 are connected to the field transmitter, while terminals 5 and 6, as well as 7 and 8, serve as outputs connected to the AI channels of the DCS or PLC cards. Terminals 9 and 10 provide power for the safety barrier.
Terminals 1 and 2 are connected to a four-wire instrument; since it has two separate power lines, it functions as a current source for the safety barrier. 3 corresponds to the + terminal of the three-wire power supply; 1/4 means 1 or 4 as the positive signal terminal, and 2 corresponds to the common negative terminal for both the power supply and the signal
What was said upstairs is correct; 1.2 is passive