Recent content by dwpatterson

I would suggest investigating in-place pipe lining where they pull in a liner then cure it in place with steam to seal any leaks in the pipe.

The 24VDC DO and DI cables are the same type and class so they can go together. The 24VDC AI and AO are the same voltage class as well and since they are shielded twisted pair they will be fine in the same cable tray with the 24VDC discrete cables. What you do NOT want to mix with 24VDC analogue...

Is there any way to subscribe to new forum listings? That seems to have stopped happening and I don't see any way to resubscribe. thx

There are a wide range of PLCs that are SIL rated, some have a 2nd safety rated CPU, a safety library of functions and safety I/O. Others are designed to be 100% SIL rated from SIL 2-4. Rockwell has safety PLCs and a line of true TMR 2oo3 SIL 3 PLC from their acquisition of ACS Triplex...

There are many pressure and differential pressure applications when a purge flow is necessary to keep the impulse lines free of the process which can plug the impulse lines. I would suggest that this is what they are doing while at the same time measuring the backpressure at the end of the...

Because likely you are connected to the local electrical grid, and you are locked to its frequency. Only if the local grid has blacked out is there no frequency reference for your generators. Is your black start from a complete local grid failure or an electrical blackout just on your...

Since your flows and volumes are going to relatively small, I would suggest displacement type flow transmitters or even small displacement or diastolic pumps to dispense the water and cutting fluid, and effectively "measure" it as well. This will be simpler and much less expensive than flow...

I found an Installation for Trident V2 online; http://www.infi90.com/Files/Bailey%20Infi90%20Documentation/Triconex/Planning%20and%20Installation%20Guide%20for%20Trident%20v2%20Systems.pdf Pg 253 has the RS-232 Serial Cable pinout. Pg 41- The MP baseplate serial Protocols are-Slave, RTU...

You didn't say wither the cable is for an EICM or TCM module. But a little google searching finds a Planning and Installation Guide for Tricon v9 - v10 Systems: https://www.nrc.gov/docs/ML0932/ML093290420.pdf On Pg 284 is the pinout for the TCM RS-232 Serial Cable. The EICM just has a 25...

The S5000 is a 4 wire transmitter and depending on config, number and type of sensors and distance you will need a heavier 24VDC power cable. See Table 1 Pg 26 in the manual. http://s7d9.scene7.com/is/content/minesafetyappliances/General%20Monitors_S5000_Manual-EN You could try using 2 or 3...

You will find that most modern 2 wire instruments are supplied rated as general purpose NEMA-4, IS and explosion proof. If you install it without an IS barrier it is only certified for GP service. Install it is a proper IS loop with correct wiring and an IS barrier and it is rated IS...

You left out the most important information: 1- what is the HP of the motor 2- what is the kVA rating of the inverter A motor when starting will draw 10X it's rated current for a few cycles. You need an inverter rated for that and a battery bank to provide that short duration peak...

Although modern DCS and PLC controllers, I/O and front end hardware have the same price point, the DCS has proprietary software, server and point licensing requirements. So depending on what HMI, SCADA and historian you use and want to integrate this new pump station into; that will determine...

>I am installing a high speed IO card, but it doesn't have >HART capabilities. Which solutions do I have to avoid this >problem? Only handheld? Use of two IO cards? A high-speed card for machinery control and protection will have a sub 1 msec to 10 msec scan rate. So HART will add no value...

>What are the major differences between honeywell Plant >Cruise DCS and Experion PKS DCS? From a Plant Cruise solution note: PlantCruise by Experion's innovative technologies are vital to improved plant performance and better business results, and can be implemented in a way that suits...