Yokogawa ATF9S-00 FOUNDATION Fieldbus Pressure Clamp Terminal Block

Engineering Overview

The ATF9S-00 (Suffix S1) is a high-performance, passive termination interface engineered specifically for FOUNDATION Fieldbus (H1) network segments within the Yokogawa CENTUM VP and STARDOM architectures. This terminal block acts as the critical physical junction between field-installed bus segments and the system’s I/O modules, such as the ALF111.

Unlike standard digital terminals, the ATF9S-00 is designed to preserve the high-frequency digital signal characteristics required for Fieldbus communication. The integration of pressure clamp technology ensures a gas-tight connection that resists the loosening effects of mechanical vibration and thermal expansion, which are common causes of data packet loss in industrial fieldbus networks.

Comprehensive Technical Specifications

• Manufacturer: Yokogawa Electric Corporation

• Model Designation: ATF9S-00 (Suffix: S1)

• Communication Protocol: FOUNDATION Fieldbus H1

• Wiring Mechanism: Pressure Clamp (Spring-loaded)

• Configuration: Single (Non-redundant) connection type

• Electrical Property: Passive (No external power required)

• Input/Output Points: Designed for Fieldbus segment termination

• Compatible Modules: ALF111 Fieldbus Communication Module

• Dimensions: Approximately 22 mm x 124 mm x 126 mm

• Net Weight: 0.2 kg

• Mounting Method: Direct nest mounting or DIN rail interface

Network Integrity and Maintenance

The ATF9S-00 (ATF9S-00) facilitates a "hot-swappable" style of maintenance for the field wiring. Because the terminals utilize spring-tension technology, the force applied to the conductor remains constant over the life of the installation, eliminating the need for periodic torque verification required by screw-type terminals. This is particularly advantageous in offshore platforms and chemical processing plants where access to junction boxes is restricted.