The Yokogawa SNT411-5F Optical ESB Bus Repeater Master Module extends the communication range of the Enhanced Safety Bus (ESB) system. It connects directly to the SEC401, SEC402, or SSB401 modules, ensuring stable optical data transfer across long distances.
Flexible Network Configuration
The SNT411-5F supports both star-type and chain-type connections. This flexibility allows engineers to design centralized or decentralized network topologies without performance loss.
Performance and Reliability
With a transmission distance of 5 km to 50 km, the SNT411-5F guarantees high-speed data transfer in large industrial plants. The module provides optical power attenuation of 3–4 dB depending on the pairing with SNT511 or S2EN501 units. Users can add attenuators when optical loss is below recommended thresholds.
Technical Specifications
- Function: Optical transport of ESB Bus signals (Vnet/IP only)
- Connection Types: Star and chain supported
- Connecting Stages: Up to 2 stages supported
- Transmission Range: 5 km – 50 km
- Optical Attenuation: 3–4 dB typical between master and slave
- Current Consumption: 0.5 A
- Weight: 0.3 kg
- Temperature Range: –20 to 70 °C (ISA G3 compliance)
Model and Codes
| Description | Model Code | Suffix Code |
|---|---|---|
| Optical ESB Bus Repeater Master Module (5 km to 50 km) | SNT411 | -5 |
| Optical ESB Bus Repeater Slave Module | SNT511 | -F |
| Optical ESB Bus Interface Module | S2EN501 | -2xxxx |
Important Note
Always pair the SNT411-5F master side with the SNT511-F or S2EN501 slave side. This ensures correct optical signal transmission and prevents system errors.
Details
| Weight | 0.3 kg |
|---|
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