Article View: sci.electronics
Article #5980Re: Current-loop rs-232 <-> rs-232 converter scematics needed
From: Wayne Diener
Date: Sat, 01 Sep 1990 22:19
Date: Sat, 01 Sep 1990 22:19
26 lines
1637 bytes
1637 bytes
>In article <HUOPIO.90Aug31115619@kannel.lut.fi> huopio@lut.fi (Kauto Huopio OH5LFM) writes:
>If anyone has easy scematics for a converter from current-loop rs-232
>to "normal" rs-232, please e-mail here. Our cs club got a printer that
I've used the following circuit successfully. I'm not aware of any
IC's that do it directly ---
Current Loop Side Logic Side
+5
___
|
4N28 +5 R
-------- ___ R 2.2K RS232 driver (inverting)
1 | | 6 | R |\
+ (source) -----| |--------- |--------| o----->
2 | | 5 10K |/ C |/
- (sink) -----| |------RRRRR-------| 2N222
3 | | 4 |\ E
No Conn. ---| |------RRRRRR---|----|
-------- 180K |
---
\ / (gnd)
--
Technical Details
Message-ID:
<wayned.9498@wddami.spoami.com>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!isc-br!hawk!wddami!waynedReferences:
<HUOPIO.90Aug31115619@kannel.lut.fi>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cs.utexas.edu!uunet!isc-br!hawk!wddami!wayned From: wayned@wddami.spoami.com (Wayne Diener) Newsgroups: sci.electronics Subject: Re: Current-loop rs-232 <-> rs-232 converter scematics needed Message-ID: <wayned.9498@wddami.spoami.com> Date: 1 Sep 90 22:19:24 GMT References: <HUOPIO.90Aug31115619@kannel.lut.fi> Sender: uueagle@hawk.isc-br.com (Eagle Proj UUCP login) Lines: 26