3 phase 3 wire 240 volt with a grounded leg please explain this one...I understand the rest
PLC Watchdog - ControlLogix
For an industrial gas turbine application, should you require an independent watchdog for a ControlLogix PLC?
Separate Instrument Earth Pit
Separate Instrument Earth pit not available
Push Experion Quick Builder Point to TDC 3000 Point
Push a SCADA (Quick Builder Point) down to a NUMERIC on the TDC 3000 System
Load Cell Matching in Weigh Bridge
How to connect different capacity loadcells?
Circuit Breakers Maintenance Testing
Breaker timing results evaluation
By Bob Peterson on 2 October, 2015 - 3:46 pm
I think NETA has some standards on that. But, really, wouldn't it be better to get it from the...
Equipment Recommendations Needed for 4 Wire Power/Control of 4 Devices
What equipment can be used to individually control and power four 120V devices using only four conductors?
By Sparky49 on 2 October, 2015 - 5:49 am
Mr. Matson, Thank you for the reply. The ladder diagram looks good. The full diagram looks...
By Roy Matson on 1 October, 2015 - 5:15 pm
Moore Industries used to have a device called a Data Concentrator however it would need a pair of...
How Common Is RS-485/422 4-wire?
In this year of 2015, how common are 4-wire RS-485/422?
By Roy Matson on 1 October, 2015 - 4:38 pm
>In this year of 2015, how common are 4-wire RS-485/422 devices? Like you I'm a bit rusty, I...
Adding a Variable Load Option
Posted by Isaac Adekanye on 1 October, 2015 - 3:39 pm
How to add a variable load and analog control to a circuit
Generators and leading power factor
Leading power factor for backup generators
By Chris Dulnik on 1 October, 2015 - 8:35 am
In a leading PF load situation it is the load that reverse excites the engine generator causing the...
Design Verification of Switchgear
Looking for software that is suitable for design verification of switchgear
Connecting 2, 3, and 4 Wire Current Loops
Connecting 2, 3, and 4 wire current loops to the same current sinking PLC input card whilst avoiding ground loops.
Control Panel Standard Practices
How Does The Output Of The Pid Controller Remain Non-Zero?
How does the output of the PID controller remain non-zero after the error becomes zero?
EEX d + INSTRINSICALLY SAFE
Connecting flame proof device EEX d (faure herman ultrasonic transmitter) to an intrinsically safe system
Yokogawa DP97 KB Port Protocol
What kind of communication protocol does DP97 KB port use?
How to Create MODBUS Master Using UART in Controller for HMI
Using a microcontroller as a MODBUS master as UART and controlling another device
What is the significance of Bleed Valve operation from start up to full loading a Gas Turbine?
Protection Settings for Small Motor 200kw / 440V
References for setting protection on small motor
Rosemount Pressure Transmitter 2051TG vs 2051TA
Compare the 2051TG and 2051TA Rosemount Pressure Transmitter
By Roy Matson on 23 September, 2015 - 6:21 pm
The company I work for makes Acid concentrators flashing off weak acid into a vacuum. This is...
By Jmtyler on 18 September, 2015 - 2:56 pm
Dear QUANGNGUYENVAN My company represents Rosemount in distribution as well technical support. ...
How can i convert CFM to Pascal?
Prosafe-RS tags acessibility in Centum CS3000
Unable to access Prosafe-RS tags in CS3000 Control Drawing
By controllerguy19 on 23 September, 2015 - 7:47 am
Hi guys, are there any news on that matter? I'm facing similar problems to call Prosafe-RS...
Non-Nuclear Density Meter For Slurry
Posted by Austin Bell on 24 April, 2012 - 2:27 pm
Does anybody know of a non-nuclear continuous in- line density meter for slurry?
ControlLogix and Profibus DP Pepperl+Fusch with Prosoft
Integrating a redundant application with ControlLogix and Profibus DP Pepperl+Fusch with Prosoft MVI56-PDPMV1
Ex'd' Certified Transmitter in Ex'i' loop
What should be the loop electrical certification when an Ex'd' Certified transmitter is connected to an intrinsically safe loop/barrier of PLC/DCS?
By Daniel on 20 September, 2015 - 7:40 pm
The Tx will work but the loop will be unsafe. In the other hand, in a safe Area, you can install...
Is a dedicated control system required for anti-surge control of compressor?
Segregating AI and AO signals.
By Bob Peterson on 18 September, 2015 - 1:06 pm
The AI/AO can certainly be combined into a single cable if that is convenient. It may end up being...
By W.L. Mostia on 18 September, 2015 - 10:36 am
You should have no trouble running AI's and AO's in the same cable. I would recommend shielded,...
Can you drill a Ex d e ib enclosure?
GRP JB EEx E Certification.
I want to enlarge cable entry hole of M25 to M40. Do I require re certification for the same JB?