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altennant
Associate

Join Date: Sep 2006
Posts: 47
Good Answers: 1

Compressor Temperature Monitoring

02/17/2011 12:00 PM

I have a compressor with approx. 20 RTD's for bearings and motor windings and gas temp's etc. The panel mounted monitor that also generated alarms and trips is old and obsolete. Can someone sugest a replacement device.

I don't have the room to wire this many RTD's to my DCS and do the alarming and trip function remotely.

I would prefer to keep it in the local panel with a readout display and alarm and trip functions.

The old unit had three modules of 8 channels each.
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RDGRNR
Guru
Engineering Fields - Instrumentation Engineering - New Member

Join Date: Dec 2009
Location: San Antonio, TX USA
Posts: 844
Good Answers: 29
#1

Re: Compressor temperature monitoring

02/17/2011 12:47 PM

Try these guys. Usual disclaimer.

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Mikerho
Guru
Hobbies - Musician - Engineering Fields - Chemical Engineering - New Member Engineering Fields - Control Engineering - New Member Engineering Fields - Instrumentation Engineering - New Member

Join Date: Jan 2007
Location: Moses Lake, WA, USA, Thulcandra - The Silent Planet (C.S. Lewis)
Posts: 4216
Good Answers: 194
#2

Re: Compressor Temperature Monitoring

02/17/2011 1:32 PM

Or these other guys. (Disclaimer).

I like this style because the PLC ends up being a single unit. The basic unit is the screen and processor. The input modules, such as RTD, are attached to the back.

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Bud
Power-User

Join Date: Jul 2010
Posts: 136
Good Answers: 19
#3

Re: Compressor Temperature Monitoring

02/17/2011 1:58 PM

I was somewhat taken aback. I'm working on exactly that right now. 24 alarms on a compressor.

Screen shot of the first 6 alarms function block layout below.

Honeywell HC-900. Rock solid. I use it because the universal input cards take RTD or 4-20mA (or thermocouple) directly on any input. 1 spare analog card fits all.
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wrenchpuller
Commentator

Join Date: Dec 2007
Location: texas
Posts: 92
Good Answers: 8
#4

Re: Compressor Temperature Monitoring

02/17/2011 10:56 PM

Hi,

we have Bently Nevada 3500 systems with local displays and relay module for alarms and trips.points are sent to DCS via Modbus.

Thank you.

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