SynC · Topic
These are the standards in the SynC Standards library that cover Hazardous Location. Each one is a complete, plain-language specification: the scope it applies to, the requirements that govern it, and a structured equipment datasheet listing the values a project has to decide — ratings, materials, setpoints, and the standards each is verified against. All of it is free to read without an account and published under CC BY-SA 4.0.
A standard usually carries several topics, so most of the entries below also appear under neighbouring subjects. The topics each one carries are listed on its own page.
Field-mounted measurement instruments and transmitters for the core process variables pressure, level, and temperature, and for general-purpose process measurement, on industrial, process, and water/wastewater (WTP/WWTP) projects. Covers gauge, absolute, and differential pressure transmitters; hydrostatic, radar (non-contact and guided-wave), ultrasonic, and float level instruments; RTD and thermocouple temperature elements with thermowells and transmitters; signal and output types (4-20 mA with HART, and digital fieldbus options); accuracy and turndown; wetted materials and process connections; ambient and hazardous-area (Class/Division and Zone, intrinsic safety) ratings; local indication; and instrument tagging and loop identification per ANSI/ISA-5.1. Reference loop integration to Control Systems Integration and signal wiring to Conductors And Cables.
Programmable logic controllers (PLCs) and programmable automation controllers (PACs) serving as the real-time logic solver for industrial, process, and water/wastewater (WTP/WWTP) control systems. Covers processor (CPU) selection and memory, the I/O subsystem (discrete and analog input/output modules and signal conditioning), remote and distributed I/O, redundancy and high-availability architectures (hot-standby CPUs, redundant power and network), IEC 61131-3 programming languages, scan-time and performance requirements, power supplies, time synchronization, environmental and hazardous-area ratings, and safety-rated controllers for safety instrumented systems where process safety applies. Applies to controllers mounted in industrial control panels and field enclosures across treatment plants, pump and lift stations, pumping and conveyance systems, and process manufacturing.