WATER METER PULSES READING

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joedtara
Posts: 2
Joined: Wed Dec 12, 2018 9:24 am

WATER METER PULSES READING

Post by joedtara » Wed Dec 12, 2018 9:36 am

Hello, I am interested in reading the number of pulses from a water meter directly through a PLC. I undestand that the water meter offers dry contact output for the pulses so I wonder if I could use a 24 V power supply and send the pulses to the PLC input, Is there any trouble with the connection that I'm trying or how could I read the pulses.
The meter I have is the model SPWM-100-CF, thanks for the support

Jameson
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Joined: Fri Nov 04, 2011 7:42 pm
Location: Santa Cruz, CA
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Re: WATER METER PULSES READING

Post by Jameson » Wed Dec 12, 2018 2:03 pm

Hello joedtara,

Yes, this will work, but we recommend no more than 20mA and 24V for reading the pulse on all our water meters. So please use a resistor to limit the current, otherwise the reed switch could be damaged.

You can test the pulse output from the water meter using a continuity tester on a handheld multimeter. You should hear a beep for each rotation of the water meter dial that has a magnet on it. I would then make sure that you are limiting your amps to 20mA before connecting your PLC to the water meter pulse output.

Hope this helps,
Jameson
EKM METERING
http://www.ekmmetering.com
831.425.7371

joedtara
Posts: 2
Joined: Wed Dec 12, 2018 9:24 am

Re: WATER METER PULSES READING

Post by joedtara » Thu Dec 13, 2018 6:13 am

Ok thank you very much for the support, and I will check then the current that the PLC inputs require.

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