« previous next »
Pages: [1]   Go Down

Author Topic: Open circuit voltage at the input to the 4 - 20mA loop  (Read 2107 times)

0 Members and 1 Guest are viewing this topic.

Offline IconicPCBTopic starter

  • Super Contributor
  • ***
  • Posts: 1631
  • Country: au
Open circuit voltage at the input to the 4 - 20mA loop
« on: February 29, 2016, 03:47:56 am »
What might be the range of open circuit voltages in a 4-20mA receiver?
Logged
 

Offline IconicPCBTopic starter

  • Super Contributor
  • ***
  • Posts: 1631
  • Country: au
Re: Open circuit voltage at the input to the 4 - 20mA loop
« Reply #1 on: February 29, 2016, 04:22:46 am »
Seems the answer is anyone of folowing 12, 15, 24, 36V while the older units may be operating at voltages higher than 36V.
Logged
 

Offline Rerouter

  • Super Contributor
  • ***
  • Posts: 4720
  • Country: au
  • Question Everything... Except This Statement
Re: Open circuit voltage at the input to the 4 - 20mA loop
« Reply #2 on: February 29, 2016, 06:30:12 am »
common industrial supply voltage is 24V, however most controllers and similar support up to 48V on the input, 48V is generally the highest you will see,
Logged
 

Offline dwpatter53

  • Contributor
  • Posts: 34
  • Country: ca
Re: Open circuit voltage at the input to the 4 - 20mA loop
« Reply #3 on: March 01, 2016, 10:20:27 pm »
If the 4-20 mA loop has a loop powered device, that  devices minimum voltage will determine the minimum voltage.

The most common supply voltage in industrial instrumentation and process control is nominally 24 VDC.
Actual voltage can range up to 26-28 VDC.
Logged
Dave P.Eng. BScEE
Super Control Engineer retired
 
Pages: [1]   Go Up
« previous next »

Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf

 

-->
EEVblog® Main Site EEVblog® on Youtube EEVblog® on Twitter EEVblog® on Facebook EEVblog® on Odysee