Thermocouple problem
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After the thermocouple signal enters the DCS, can it be used to generate a 4-20 ma AO signal via the DCS for use by other instruments?
It is better to install a safety gate with one input and two outputs that is temperature-sensitive.
Add an input-to-two-output isolation module, and that’s it.
The original poster hasn’t explained clearly; is it necessary to use the readings from thermocouples, with the DCS then generating a 4-20mA signal to control other instruments? For DCS programming, you just need to provide the values directly to the AO; there are countless ways to do this
Does the poster mean to create a chain program? This is too simple
Sure, I use it to provide input for compensation to the flow meter
From a cost perspective, the preferred option is a one-input two-output rail-mounted temperature transmitter or a one-input two-output thermocouple safety barrier, as they offer a moderate price along with higher precision. Guideway-type temperature transmitter yunrun.com.cn/product/2014.html http://yunrun.com.cn/upload/201806/04/201806040027066808.png
It’s possible; it’s best to use a one-to-two signal distributor, as that is the most suitable approach
Temporary fixes are acceptable, but they occupy DCS channels; it’s not a problem if there is plenty of capacity available, but in situations where resources are limited, it’s better to use isolators at the appropriate time