Excellent PLC
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| Mobile | +8613666033393 | |||||||
| +8613666033393 | ||||||||
| 13666033393 | ||||||||
| Add | Room 1004, No. 62 Xiangxiu Li, Siming District, Xiamen City, Fujian Province, China | |||||||
Product Overview
The Yokogawa SNT501 Optical ESB Bus Repeater Slave Module is designed to extend the ESB bus transmission distance by converting ESB bus electrical signals to optical signals when connected to a master module (SNT401) or N-ESB bus module. It supports both star and chain topologies, enabling flexible system configurations with maximum optical transmission distances up to 5 km (or 10 km in Vnet/IP R1.03 or later systems).
Technical Specifications
| Parameter | Value |
|---|---|
| Function | ESB Bus optical transport function |
| Connection Type | Star or Chain |
| Max. Connecting Stages | 2 |
| Max. Transmission Distance | 5 km (10 km in Vnet/IP R1.03+) |
| Current Consumption | 0.5 A |
| Dimensions (H x W x D) | 142.5 x 130 x 32.8 mm |
| Weight | Approx. 0.3 kg |
| Mounting | On SNB10D or SNT10D unit |
| Operating Temperature | -20 to 70 °C (optional) |
| Standards Compliance | ISA G3 (optional) |
Applications
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Extending ESB bus communication distance in safety control systems.
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Connecting remote safety node units and N-IO nodes via optical fiber.
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Reducing electrical noise by using optical links in harsh industrial environments.
Advantages
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Supports both star and chain network topologies for flexible design.
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Optical transmission mitigates electromagnetic interference.
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Compact size and light weight simplify installation.
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Compatible with both ProSafe-RS and Vnet/IP networks.
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Allows long-distance communication (up to 10 km in modern systems).
Frequently Asked Questions
Q1: What is the maximum distance supported by the SNT501?
A1: Up to 5 km for two stages, or 10 km in Vnet/IP R1.03 or later systems.
Q2: Can SNT501 work alone without an SNT401?
A2: No, it must be paired with a master module such as SNT401 or N-ESB module.
Q3: Is the SNT501 suitable for star topology connections?
A3: Yes, it supports both star and chain type connections.
Q4: What is the power consumption of the SNT501?
A4: It consumes approximately 0.5 A.
Q5: Can it operate in high-temperature environments?
A5: Yes, with the proper suffix code (-3 or -F) it can operate up to 70 °C.
Q6: What is the weight of the SNT501?
A6: About 0.3 kg.
Q7: Which units can the SNT501 be mounted on?
A7: It can be mounted on SNB10D or the dedicated SNT10D unit.
Q8: Does the SNT501 include a terminator?
A8: No, terminators are included only in specific master modules.
Q9: How many SNT501 modules can be chained?
A9: A maximum of two stages of repeaters are supported.
Q10: Is the SNT501 explosion-proof?
A10: Explosion-proof variants are available with the proper suffix code (-E).
Recommended Related or Similar Yokogawa Models
| Model | Description | Dimensions (mm) | Weight |
|---|---|---|---|
| SNT401 | Optical ESB Bus Repeater Master Module | 142.5 x 130 x 32.8 | 0.3 kg |
| S2EN501 | N-ESB Bus Module | 142.5 x 130 x 32.8 | 0.3 kg |
| SEC401 | ESB Bus Coupler Module | 142.5 x 130 x 32.8 | 0.3 kg |
| SEC402 | ESB Bus Coupler Module (variant) | 142.5 x 130 x 32.8 | 0.3 kg |
| SSB401 | ESB Bus Interface Module | 142.5 x 130 x 32.8 | 0.3 kg |
| SNT10D | Unit for Optical Bus Repeater Modules | Rack-mountable | — |
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|---|---|---|---|
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