​ General Introduction and Application yokogawa

General Introduction and Application

This document (GS 33K50H40-50E) by Yokogawa Electric Corporation provides the hardware specifications for a series of terminal blocks designed for the CENTUM VP (Release 5) system. These terminal blocks serve as the connection interface between Field I/O (FIO) modules with built-in barriers and various field devices. The primary connection method utilized is the pressure clamp terminal, ensuring secure wiring. The specifications are crucial for engineers and technicians integrating these components into an industrial control system, particularly in environments requiring intrinsic safety.

Product Models and Configurations

A comprehensive range of terminal block models is available to support different I/O signal types, with options for both single and dual-redundant configurations to enhance system availability. The models include:

• Analog I/O: ATSA3S/ATSA3D for 8-channel analog inputs (connecting to ASI133 modules) and ATSS3S/ATSS3D for 8-channel analog outputs (connecting to ASI533 modules).

• Temperature/Potentiometer Inputs: ATST4S/ATST4D for 16-channel Thermocouple/mV inputs (for AST143 modules) and ATSR3S/ATSR3D for 8-channel RTD/Potentiometer inputs (for ASR133 modules).

• Digital I/O: ATSB4S/ATSB4D for 16-channel digital inputs (for ASD143 modules) and ATSD3S/ATSD3D for 8-channel digital outputs (for ASD533 modules).

Environmental and Safety Compliance

These terminal blocks are built to withstand harsh industrial conditions, demonstrated by their compliance with ISA S71.04 Class G3 standards. They are designed to operate reliably across a wide ambient temperature range of -20 to 70°C. For applications in hazardous areas, the document emphasizes the importance of safety. When installing circuits that must be intrinsically safe, users are required to reference the "Explosion Protection" (TI 33Q01J30-01E) and "Explosion Protection of FIO Products" (IM 33Y06K01-90E) manuals to ensure compliance with CENELEC standards for explosion protection.

Physical Dimensions and Ordering Information

The document provides detailed diagrams illustrating the external dimensions for all models. The single-channel terminal blocks (e.g., ATSA3S) have a compact form factor, while the dual-redundant versions (e.g., ATSA3D) are wider to accommodate the additional circuitry for redundancy. To facilitate procurement, the specification includes clear tables listing the exact model and suffix codes that must be used when ordering. This ensures that the correct component is specified for each unique application and I/O module type.