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Industrial process instrumentation

Process transmitters and analogue signals

How many signals?

Process transmitters and analogue signals: question 1 of 3

Which signal or protocol is available?

Named on the meter, controller or transmitter datasheet, and usually on its terminals.

Modbus RTU over RS-485A serial bus, commonly labelled A/B or +/−. Modbus TCPModbus over Ethernet (TCP/IP). Pulse outputA dry-contact or open-collector (S0) pulse per unit. 4–20 mAA current loop from a transmitter. 0–10 VA voltage output from a controller or sensor. OPC UAThe automation protocol, over Ethernet. LoRaWANA wireless sensor or meter on a LoRaWAN network. A temperature probeA probe read directly, with no meter in between. No usable outputNothing on the equipment can be read. I'm not sure

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