Yokogawa Electric Corporation STB4S-00 Terminal Module

The Yokogawa STB4S-00 Terminal Module is a pressure-clamp terminal block designed for direct wiring of digital input and output signals to Yokogawa control systems such as CENTUM VP and ProSafe-RS, eliminating the need for intermediate relay boards or signal cables. As Style S2, this single, non-redundant terminal block supports 8- or 16-channel configurations and provides a direct interface between field devices—switches, relays, and sensors—and SDV144, SDV531, or SDV541 digital I/O modules. The pressure-clamp direct wiring enables clean, reliable signal termination in distributed control and safety systems, with mounting inside control panels or I/O racks and a weight of approximately 0.2 kg; surge absorber is not included in the standard configuration. Common replacements include STB4S-10 (with surge absorber), STB4D-00 (dual-redundant version), and related Yokogawa terminal boards such as SED4D or SBD4D, which are often employed in oil and gas, LNG plants, chemical processing, and power generation environments.