Recent content by seanatkinson

Hello all, I have used Modbus RTU for years with great success, but now I need to use Modbus TCP, with a GE fanuc 90-30 Modbus CMM321. The analysers at the other end of the ethernet cable (Symbion-DX) will communicate in 32 bit Modbus TCP only. Has anyone out there had some sucess with GE Fanuc...

Try Cooper Crouse-Hinds for a remote IO they manufacture in Germany. We ahve good track record with this IO in a coler but wet environment.

The point about a canned pump and hazardous areas is that there is no mechanical seal. Thefore 1 likely leak point is eliminated and the hazardous zoning of the space around the motor can sometimes be re-evaluated to a less hazardous zone. For mag drive pumps the motor is not in the liquid, the...

ATEX is for explosive atmospheres only. Remember 400 VAC 3 phase 50 Hz for Ireland.

Scotty, Your advice was very productive. That model of switchgear from GEC is still made, by GE. Thanks.

I am trying to fit an extra load into a 20 year old 400 Volt 3 phase distribution board. The existing switch fuses are GEC CM-MT units. This is the english General Electric Company, not the US. GEC seems to not be in the switchboard business anymore 1) Does anyone know if there is any company...

Trying to remove Siemens S5 and replace with S7, controlling Westfalia Seperator. There is an unusual IO card - S5-abp1. Fits into Siemens Series S5-100 backplane. Does anyone know what it does, how to upload it's configuration, what might replace it in the s7 range. My local Siemens office...

Mike, It's always interesting to see how others solve very similar problems in novel ways. For some extra guidance about mixing SILs into the petroleum industry there are 2 excellent documents from the Norwegian Oil Industry, (in english). I dont recall the web links for download but if you...

Process safety interlocks, e.g. No addition to batch reactors unless agitiation is adequate, Safety interlocks on headers to incinerator, machine safety related to crushers, bag loaders, tippers etc. These are mainly SIL1 with some SIL 2. SIL 3 is not part of the current situation but I would...

Hello all, For a safety critical application (SIL 2, possibly SIL3) Siemens have suggested S7-414F. Is there some experience in the group in using this PLC

Dry running vacuum pumps bought new for installation into an ATEX regulated plant will be complex as the manufacturers response to ATEX has included the installation of many new temperature switches & pressure switches. These will need to be incorporated into a shutdown system meeting IEC 61508...