Yokogawa SNT411 Optical ESB Bus Repeater Master Module

The Yokogawa SNT411 Optical ESB Bus Repeater Master Module extends ESB bus communication by converting electrical signals into optical signals, enabling longer transmission distances up to 50 km. It supports both star and chain type connections and is designed for use in safety control systems (ProSafe-RS). It is typically connected to ESB bus couplers or interfaces and paired with the SNT511 slave module for extended reach.

Technical Specifications

Applications

• Long-distance ESB bus communication in safety control systems

• Integration of remote safety node units with the main control system

• Fiber-optic based high-reliability industrial communication networks

• Use in environments requiring explosion-protected or high-temperature rated equipment (with options)

Advantages

• Extends ESB bus communication up to 50 km with optical fiber

• Supports both star and chain topologies for flexible system design

• Compact and lightweight for easy installation

• High reliability and compatibility with ProSafe-RS systems

• Optional terminator and explosion-proof variants available

FAQ

Q1: What is the maximum transmission distance of the SNT411?

A1: It can extend ESB bus communication up to 50 km when properly paired with slave modules.

Q2: Can it be used in both star and chain topologies?

A2: Yes, the SNT411 supports both star and chain type connection methods.

Q3: What is the typical power consumption?

A3: The typical current consumption is approximately 0.5 A.

Q4: Is the SNT411 compatible with ProSafe-RS systems?

A4: Yes, it is specifically designed for use in Yokogawa ProSafe-RS safety control systems.

Q5: Are explosion-proof versions available?

A5: Yes, explosion-protected models are available with the appropriate suffix code.

Q6: Can the SNT411 be mounted in high-temperature environments?

A6: Yes, models compliant with -20°C to +70°C operation are available.

Q7: What is the weight of the module?

A7: The SNT411 weighs approximately 0.3 kg.

Q8: How many stages can be connected in series?

A8: A maximum of two stages can be connected.

Q9: Does it require a special connector?

A9: Yes, it is available with a connector unit (with or without terminator).

Q10: Can the SNT411 and SNT511 be mounted in the same system?

A10: Yes, they are designed to work together in the same system to extend communication.