Why does an electromagnetic flowmeter lose signal after passing through the safety barrier?
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Why does an electromagnetic flowmeter lose signal after passing through the safety barrier? A signal is only available when connected directly to the terminal block.
If you put the terminal back in place, there will be a signal.
It’s estimated that the wiring is connected in a two-wire system; changing it to a safety barrier that doesn’t require power should solve the problem.
Safety barriers don’t work with many 2-wire instruments; I’ve also seen a 24V Lincoln motor connected to a safety barrier that simply couldn’t be powered.
There’s only one possibility: the wires were connected incorrectly. Follow the safety barrier wiring diagram.
The safety barrier has power-connected and power-disconnected configurations; you need to check the manual
There are two connection methods: with power supply and without power supply. If it’s not connected properly, there will be no signal.
There’s no doubt that the safety barrier has been wired incorrectly
If we ignore the isolation and current-limiting functions of the safety barrier, then it is simply a small resistor in the circuit, with no significant effect on the signals and currents in that circuit. I think it must be a wiring issue, or a setting problem with the card.
It is intrinsically safe or flameproof; this is generally related to the safety barrier setup. Attention should also be paid to active and passive signals