Typical Technical Parameters Parameter Specification Interface Type EIA/TIA-232 (Standard Serial RS-232) Connector Type Varies by device. Often a proprietary, weather-proof jack requiring a specific Fisher/Emerson cable (e.g., for connection to a Fisher 475 Field Communicator). Data Format Asynchronous, 8 data bits, No parity, 1 stop bit (8N1) is common. Baud Rate Device-specific, but commonly 9600 or 19200 baud. Communication Mode Full-Duplex, Point-to-Point. Communication Protocol Not a process protocol like HART. It uses a device-specific proprietary protocol (e.g., Fisher's own protocol for the FIELDVUE series) that is interpreted by dedicated configuration tools. Primary Use Local device configuration and diagnostics, not for real-time process control. Compatible Tools Fisher 475 Field Communicator, laptop with AMS Device Manager and a specific interface cable.
