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The device, the positioner, will not be protected from electrical faults in the safe area that could create arcing/sparking conditions in the positioner. It will function OK as a positioner, just not as an I/S positioner. The intrinsic safety is only achieved when the loop is engineered...

The reason Modbus RTU is "one master only" is that there is no control over the 485 bus (other than a single master) so that messages don't collide with one another. Assuming there's a BacnetIP/ModbusRTU gateway, - Have the Modbus RTU master poll the Modbus RTU slaves. - Have the Modbus...

I'm in that group of people who mess with Modbus who like external serial setting devices, like DIP or rotary switches or jumpers. But this unit does not have that. But most Modbus devices allow for firmware changes through a setup mode. I don't have a unit to play with, but my guess is...

In my opinion, it's not worth it to visit the manufacturer (and I've done it). In today's global manufacturing environment, which manufacturing site is the critical one? The vendor casting the housing and their quality control (or lack of it) in chasing the threads for conduit fittings or...

When you're a newbie in any field, it pays to read the manual. The manual here: http://eastrongroupco.hk02.057321.com/data/uploads/Eastron_SDM120-Modbus_user_manual_2016_V2_6.pdf says, "Click the button, the LCD display will scroll the measurements. Keep pressing the button for 3...

I dread start-ups with Rotorks for just this reason. The three times I was involved there there was no Rotork wiring diagram with the actuator. Each time Rotork's telephone tech support required the model number AND serial and had to 'go look it up' and send the wiring diagram later on...

The classic very thin Platinum wire wound around a ceramic mandrel did not hold up well in vibration. But I've MgO thermocouples break in vibration, too. But I honestly do not know whether the thin film RTD element RTD's are better in vibration or not.

Some thoughts Commodity items can be purchased based on quotes for price, availability, and delivery times because they're commodities: six of one, half dozen of another. If what you're buying is not a commodity item, you're not really buying the 'thing'. You're entering into a relationship...

For the data collection and SMS end, Google "datalogger" and make some calls. What you describe has to be a commercial package by now.

What sets the whole category of DCS control apart from the category of PLC control is the DCS reliance on a central database which runs on "THE SERVER". From comments on the forum here over the years, it appears that the DCS software is pretty fussy about exactly what kind of server box it...

SCADA is generic term for a class of software packages for data collection and supervisory operations, like changing an alarm setpoint. There is development software that provides the tools to: - configure and make a communications connection to the field device - select which data is...

HMI's do not use I/O to get their data, an HMI reads digital data or has digital data written to it via an industrial comm protocol. When reading or writing digital values via industrial protocols, one either gets the correct number or a communications error. Incomplete or error flagged...

A Hazardous location is an area where flammable liquids, gases or vapors or combustible dusts exist in sufficient quantities to produce an explosion or fire. The vapor space above the liquid in a tank of gasoline is a hazardous area. I'm not sure what sea dust is, but a tank of water is...

linearity

Any alternative other than a PLC, Red Lion's Data Station Plus. Red Lion's Data Station Plus is a configurable protocol converter. Although I've never used one, by all appearances, as a master it can read a 3xxxx input register, put the value in a 4xxxx register and your master can read the...

If I were you I'd Google the approval agency needed for this and "Temperature transmitter". Typical marine approval agencies: American Bureau of Shipping, ABS Lloyds Register of Shipping, LR Germanischer Lloyd, GL Det Norske Veritas, DNV Bureau Veritas, BV Registro Italiano Navale...

Acromag's 963EN-4012 module converts multiple 4-20's to Modbus/TCP Opto22's Groov can get the Modbus/TCP data and shovel it into the Ether.

> I have made a Data acquisition card A made-in-the-shop card? Or a commercial card? What brand and model?Stand-alone or PC-based? > But as it is a noisy area Audio noise doesn't count. What's a likely source for electrical noise? Electric arc welding? VFD's? >4-20 mA signal from...

1. It might help to take a look at the HCS installation manual. It is available here: http://www.miinet.com/Portals/0/Manuals/HCS_Installation_Manual_Moore_Industries.pdf Page 6 shows the HCS powering the multidrop network. Page 7 shows an external power supply powering the network...

Are you aware that an RTD is calibrated on 'paper' only; there is no means of adjusting the output an RTD? The RTD calibration certificate tells you how much error the RTD had at the given calibration points. Whatever error occurs at a given temperature is faithfully replicated by the...