Urgent online request: flow meter wiring
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This post was last edited by tiandiyi*an on 2017-8-8 at 10:47. For flow meters installed on-site, the instruction manuals are no longer available after some time has passed; where should the 4–20mA signal be connected? See the attached diagram
Try connecting the red wire below to IOUT; currently, that red wire is connected to the frequency output
But IOTU has a voltage of around 19.1 volts relative to the common level
This post was last edited by RSchufaqi on 2017-8-7 09:44: Current + connected to IOUT, current – connected to COMM; the 24V power supply is connected to the yellow and green wires mentioned above. The other connections should be as follows: PFS is for setting the pulse frequency, POUT is for pulse output, ALM1, ALM2, and COM are for alarm outputs, TXD (transmission signal) and RXD (reception signal) relate to the 232 communication protocol.
POUT should not be a frequency; it should be pulse plus
Normal voltage; the theoretical value is 24V
I’ve marked it for you with a red circle; red means correct
Is this an electromagnetic flowmeter? (Jiangsu Hongguang’s?) ）