API RP 552:2025 pdf download – Signal Processing, Transmission, and Installation

API RP 552:2025 pdf download – Signal Processing, Transmission, and Installation.
API RP 552:2025 outlines the procedures for transmitting process measurement data, control commands, and diagnostic information between field devices and control systems. It focuses specifically on the exchange of measurement readings, diagnostic statuses, and control information between these field devices and associated control or data acquisition systems. However, it does not address communication protocols or methods that occur within a control system itself. For detailed discussions regarding internal control system communications, please refer to API 554.