The Yokogawa SNT10D is an Optical ESB Bus Repeater Unit used in Yokogawa ProSafe-RS Safety Instrumented Systems (SIS) and related ESB bus / optical communication architectures.
Its main function is to extend and stabilize optical ESB bus communication networks, allowing distributed safety control units and I/O nodes to be connected over longer distances. It supports star and chain-type optical network topologies, making it essential for large-scale SIS installations.
In simple terms, the SNT10D acts as a communication backbone extender for Yokogawa safety systems, ensuring reliable high-speed data transmission between safety nodes.
Technical Specifications
| Parameter | Specification |
|---|---|
| Brand | Yokogawa |
| Model | SNT10D |
| Product Type | Optical ESB Bus Repeater Unit |
| System Compatibility | ProSafe-RS / ESB bus architecture |
| Function | Optical signal repeater / network expansion |
| Network Type | ESB bus (optical fiber communication) |
| Topology Support | Star type / Chain type |
| Installation | 19-inch rack mount module |
| Power Supply Options | 100–240 V AC / 24 V DC (variant dependent) |
| Redundancy | Supported in system configuration |
The SNT10D enables long-distance and multi-node ESB communication, improving system scalability and layout flexibility in safety systems.
Physical Characteristics
| Item | Specification |
|---|---|
| Dimensions (W × H × D) | Approx. 482.6 × 221.5 × 146 mm (rack unit dependent) |
| Weight | Approx. 5.2 kg |
| Mounting Type | 19-inch industrial rack |
| Structure | Optical bus repeater chassis unit |
| Enclosure | Industrial cabinet installation required |
System Role
The SNT10D is typically used in:
- ProSafe-RS safety control networks
- ESB bus optical fiber communication systems
- Distributed safety node architectures (SNB / SSC series)
- Chain or star topology I/O expansions
It allows multiple safety control units such as SSC, SNB, SNT series modules to communicate reliably across extended distances.
Recommended Related Models
- Yokogawa SNB10D – Safety Node Unit
- Yokogawa SSC60 / SSC50 – Safety Control Units
- Yokogawa SNT401 / SNT411 – Optical interface modules
- Yokogawa SNT501 / SNT511 – ESB communication modules
- Yokogawa ESB Bus Cable Assemblies
