Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  <20002001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  Index 1994  1995  1996  1997  1998  1999  <20002001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022 
<== Date ==> <== Thread ==>

Subject: Re: Hardware to for thermocouple readout
From: Steve Lewis <SALewis@lbl.gov>
To: "Porter, Rodney" <Rporter@pns.anl.gov>
Cc: tech-talk@aps.anl.gov
Date: Wed, 26 Apr 2000 08:58:01 -0700
At 5:24 PM -0500 2000/04/25, Porter, Rodney wrote:
>I need to monitor 24 thermocouples.  Can someone suggest EPICS supported
>hardware for this application.  


Our method of choice here is to hook them directly to Allen-Bradley
Flex-I/O modules which are deployed close to the sensors.  These 8-channel
units handle all known types, and have cold-junction compensation
and a calibration procedure.  The unit is model IT-8.

Three IT-8 units can be combined in a small DIN-rail stack. (And they can
be mixed with other units for handling pressure, flow, whatever, in a nicely
distributed manner.)  With adaptor and power supply (but not including
6008 scanner) using typical discounts, it would cost about $3700

They can connect to the IOC either directly to the 6008 scanner (we are
just finishing device support) or via any A-B series PLC (in which case
the generic PLC device support already works).

We much prefer this "raw sensor" approach here to the rack-mounted/
multiplexed/bells-and-whistles/RS-485-protocol-from-hell style of the
typical catalog instrument.  Your mileage may vary...

_____________________________________________________________________
Stephen A. Lewis                        | SALewis@LBL.gov
Mail Stop 71-259                        | http://www.lbl.gov/~salewis
Lawrence Berkeley National Laboratory   | Tel: +1.510.486.7702
Berkeley, CA 94720    USA               | FAX: +1.510.486.4544


Replies:
Re: Hardware to for thermocouple readout Steve Hunt
References:
Hardware to for thermocouple readout Porter, Rodney

Navigate by Date:
Prev: Re: Hardware to for thermocouple readout Marty Kraimer
Next: Re: Hardware to for thermocouple readout Steve Hunt
Index: 1994  1995  1996  1997  1998  1999  <20002001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022 
Navigate by Thread:
Prev: Re: Hardware to for thermocouple readout Marty Kraimer
Next: Re: Hardware to for thermocouple readout Steve Hunt
Index: 1994  1995  1996  1997  1998  1999  <20002001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022 
ANJ, 10 Aug 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·