Intelligent Device Management with DCS, PLC, and RTU
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چکیده
If 4-20 mA is used, make sure to specify 4-20 mA AI and AO cards which support native HART “pass-through”. Thus separate HART multiplexer (MUX) hardware and associated integration work is not required. Native HART pass-through AI and AO cards are much easier to integrate. HART communication is too slow for control, but is passed through to the IDM software. Be wary of proprietary smart protocols used by some DCS in the past.
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