Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

4-20mA Current Loop only used for analog signals?

Status
Not open for further replies.

asimov

Member level 3
Joined
Mar 12, 2006
Messages
60
Helped
15
Reputation
32
Reaction score
14
Trophy points
1,288
Activity points
1,646
Hi Everyone,
I am new to this current loop concept and was wonder if this
old/archiac config 4-20mA Current Loop is used only to pass analog signals
between 4 and 20 mA or the two ends of the range can be used as digital
signal signifying binary 0(4mA) and 1(20 mA).


Regards
Asimov
 

crutschow

Advanced Member level 5
Joined
Feb 22, 2012
Messages
3,789
Helped
903
Reputation
1,804
Reaction score
888
Trophy points
1,393
Location
L.A. USA Zulu -8
Activity points
21,349
Certainly you can use a current loop to transmit a two-level analog signal level and interpret it as two digital states. But it's overkill if that's all you are using the current loop for.
 
  • Like
Reactions: asimov

    asimov

    points: 2
    Helpful Answer Positive Rating

FvM

Super Moderator
Staff member
Joined
Jan 22, 2008
Messages
47,851
Helped
14,119
Reputation
28,495
Reaction score
12,800
Trophy points
1,393
Location
Bochum, Germany
Activity points
277,744
Analog current loop isn't archaic, it's very functional for a wide range of industrial applications. Digital current loop is still used in some applications, e.g. for MIDI (music instrument digital interface). For an overview http://en.wikipedia.org/wiki/Current_loop
 
  • Like
Reactions: asimov

    asimov

    points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.
Toggle Sidebar

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top