Product Description
Product Overview
The Yokogawa SNT401 is an Optical ESB Bus Repeater Master Module designed to convert the ESB Bus, which connects safety control units, safety node units, and N-IO nodes, into an optical signal. This module interfaces with the ESB Bus Coupler Module (SEC401, SEC402) on the safety control unit or the ESB Bus Interface Module (SSB401) on the safety node unit (SNB10D) via an ESB Bus cable. It supports two variants: with or without a terminator, catering to different system configurations.
Technical Information
| Item | Specifications |
|---|---|
| Function | ESB Bus optical transport function |
| Connection method | Star type connection Chain type connection Available for both star and chain type connection |
| Number of connecting stages | Maximum two |
| Transmission distance | Maximum 5 km (total two stages) In case of Vnet/IP system with R1.03 or later, maximum 10 km (total two stages) |
| Current consumption | 0.5 A |
| Weight | Approx. 0.3 kg |
Model and Suffix Codes
- Master Module:
- Model: SNT401 Optical ESB Bus Repeater Master Module
- Suffix Codes:
- -5: With no explosion protection
- -E: With explosion protection
- 3: ISA Standard G3 and temperature (–20 to 70 °C) (only for maintenance purpose)
- F: ISA Standard G3 and temperature (–20 to 70 °C) (for SNT501-F and S2EN501-1)
- Option Codes:
- /CU1N: Connector unit for ESB Bus [Part Number: S9345FA]
- /CU1T: Connector unit with terminator for ESB Bus [Part Number: S9346FA]
- Slave Module:
- Model: SNT501 Optical ESB Bus Repeater Slave Module
- Suffix Codes:
- -5: With no explosion protection
- -E: With explosion protection
- 3: ISA Standard G3 and temperature (–20 to 70 °C) (only for maintenance purpose)
- F: ISA Standard G3 and temperature (–20 to 70 °C) (for SNT401-F and S2EN501-1)