YOKOGAWA SNT401-53 Optical ESB Bus Repeater Module

Description

The YOKOGAWA SNT401-53 Optical ESB Bus Repeater Module is an industrial communication component designed to extend ESB bus transmission via optical signals. It supports star and chain connection topologies, with a maximum of two connection stages. Key transmission distance specifications include a total of 5 km across two stages under standard conditions; when used with Vnet/IP systems running R1.03 or higher, the total two-stage transmission distance can reach 10 km. The module has a current consumption of 0.5 A and weighs approximately 0.3 kg. Suffix codes indicate protection levels: -5 for non-explosion-proof and -E for explosion-proof. It connects to the ESB bus interface module (SSB401) on the safety node unit (SNB10D) via ESB bus cables, and receives power and signal input from an optical ESB bus repeater master module or N-ESB bus module through fiber optic connection cables. This module is engineered for industrial applications, enabling reliable long-distance ESB bus signal transmission to support distributed control system communications across extended plant layouts.