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There are numerous maritime certifications for controls and instrumentation. Allen Bradley lists most, if not all of them http://www.rockwellautomation.com/products/certification/marine/index.html The US Navy has been on an "open architecture" kick for awhile. Not sure how that affects...

Are you neglecting to tell us things like (speculating) - these are mounted on liquid nitrogen lines (cooling/cryogenic) - in the tropics (high relative humidity) - the conduit is not sealed off, but open to the atmosphere?

By graphical Windows display, are you inferring seeing all this data on your client's desk's PC? The easiest way I've found to get a display of multiple digital process values onto the desktop is to use the internal web server in a Honeywell paperless recorder. The recorder sits the plant's...

My experience is that it depends on the slave's ability to handle multiple masters. Some lower end devices just can't handle multiple requests, particularly in close sequence. Several models of single loop PID controllers come to mind. These are uP devices, not a full blown workstation...

1) copper wire home runs. 2) copper wire to remote I/O rack(s). Connect remote I/O racks to central point with copper or fiber optic

>have an instrument or relay >not certified for Intrinsically safe, If the device is not certified by recognized 3rd party as intrinsically safe with associated entity parameters and has an IS approval label on the device, then you can not install it in a hazardous area. even if you use IS...

Download manuals here: http://downloads.applied-automation.com/sam/honeywell/620/index.html (remove any spaces the forum inserts into the URL) For discussion of 620 software and its loader, see this thread: http://www.plctalk.net/qanda/showthread.php?t=18783

Stop and think. You have the document name, the last part of the non-working URL, afc1520m_us9.pdf How would you find an electronic file with that name? type afc1520m_us9.pdf into Google and the first hit is a document with that name.

It isn't clear to me how an isolator/converter can be for only "active" instruments/signals. The isolator might be intended for active outputs because active outputs are prone to ground loop and common mode problems, but the isolator converter 'sees' only the signal, it has no way of knowing or...

The terms "passive" and "active" normally refer to 4-20mA analog outputs as to whether the output is powered externally (passive) or internally (active). An I/P has an analog input, not an analog output. It transduces the 4-20mA signal to a proportional pneumatic signal.

Fake it with a proportional only capillary bulb controller. I think Honeywell still makes one, T77x maybe? The output of a proportional only controller will mimic a transmitter's output when the controller is setup for - direct action (rising output for rising process variable) - gain...

1) Figure out what means you have available to configure the transmitter (Hart, push buttons, FF, whatever) 2) Use those configuration means to enable the square root function on the transmitter. 3) Locate the orifice plate sizing sheet and - Note the engineering units for both...

pea-eye-dee

You don't say what the field device is, but gas detectors frequently have analog outputs. There's always some shunt resistor in parallel across the analog input's (+) and (-) so that a voltage drop is developed for current loops. Are you sure that the series component is a resistor? A...

Assuming the control signal is 4-20mA, drive both with the same 4-20mA signal in series, or use a 4-20mA splitter which provides an individual 4-20 for each actuator

You don't mention which Sepam model you are working with, so I took a look at the Sepam 1000. When used with the ACE 949-2 (2 wire RS-485), it appears that the ACE 949-2 has two terminal blocks, A & B. Since RS-485 is a sequential, serially, daisy-chained network (master > device 1 >...

Presumably the question involves an intrinsically safe barrier. If this 4 wire device has an agency approved intrinsic safety rating it also has accompanying entity parameters with which a suitable barrier could be selected. What is the rating and what are the entity parameters?

I haven't used the HART server, but the HART wireless gateways all seem to include it. Their network topology diagrams are all ethernet, so I assumed HART server had been ported to ethernet. This press release from Oct 2009 also seems to support that: HART Foundation upgrades HART Server...

The Banner Multihop-x models are full 1 watt output. With a yagi in the field and a high gain omni on the receiver, I've done 7 miles. I suspect they'll go further, especially if the receiver is a yagi, too.

1) Lots of PLCs have RS-232 ports, but don't talk Modbus. Just having a COM port is no guarantee that the device support Modbus RTU, unless the documentation says the device supports Modbus RTU. 2) Ensure that the Unitronics' RS-232 port is actually configured for Modbus RTU. On many...