Category
Desktop-type Bidirectional Single-fiber Single-mode SC 20km Universal RS-485/422/232 Interface Asynchronous Fiber Modems
Product Highlights
* Zero-delay automatic forwarding
* Adaptive single-mode optical fiber
* Asynchronous transmission, point-to-point application, RS485/422/232 interface and fiber optic conversion
* Automatically detect the serial port rate, distinguish and control the direction of data transmission
* The interface offers 1500W surge protection and 15KV electrostatic protection
* DC 5V voltage input, external power supply
Bidirectional Universal RS-485/422/232 Interface Asynchronous Fiber Modem(Data terminal, Single-mode, Single-fiber, 20KM, SC, Desktop-type)
Specifications
| Product name | RS485/422/232 Bidirectional Data Optical Transceiver |
Product model | HTDV-RS485/422/232SM |
Optical fiber type | Single-fiber single-mode |
| Fiber optic wavelength | 1310nm/1550nm |
| Transmission distance | 0 - 20KM |
Optical fiber interface | SC / FC optional |
Data interface | Industrial terminal |
Power supply voltage | DC-5V |
| Working temperature | -40℃ to 70℃ |
| Installation method | Desktop installation |

Thethree in one interface asynchronous fiber modem integrates three serial port protocols (RS232, RS485, RS422). It can switch communication modes with one click, without the need to replace additional equipment, and can be connected to various types of industrial devices such as PLC, encoders, servo motors, and access control controllers. The three in one interface asynchronous fiber modem is capable of adapting to various diversified scenarios.
2. Bidirectional Transparent Transmission of the Entire Protocol
Thethree in one interface asynchronous fiber modem supports the bidirectional transmission of serial port data and optical fiber signals. There is no need to modify the original device programs or communication parameters. Three in one interface asynchronous fiber modem perfectly complies with half-duplex/full-duplex communication modes, plug-and-play, and significantly reduces the on-site debugging costs.
Thethree in one interface asynchronous fiber modem breaks through the traditional serial port cable transmission distance bottleneck. The single-mode optical fiber transmission distance can reach 20-120 km, and the multi-mode can reach 500 m - 2 km, easily meeting the long-distance communication requirements of remote industrial measurement and control, smart power grids, and security networking, etc.
4. Industrial-grade anti-interference and stable protection
Thethree in one interface asynchronous fiber modem isolates electromagnetic interference, radio frequency interference and lightning surges through the optical fiber medium, and is suitable for harsh environments such as factory workshops, mines, and outdoor base stations with strong interference; with a wide temperature range design (-40℃ to +70℃), three in one interface asynchronous fiber modem is equipped with overvoltage, overcurrent, and anti-static protection to ensure uninterrupted operation of the equipment 24/7.
5. Flexible networking, adaptable to various topologies
Thethree in one interface asynchronous fiber modem supports various networking methods such as point-to-point, point-to-multipoint (bus type), and star topology, which can adapt to different on-site wiring architectures; baud rate is self-adaptive (up to 115.2 Kbps), compatible with mixed access of devices of different rates, and easy to expand.
Thethree in one interface asynchronous fiber modem is equipped with power supply, optical path, and data transmission/reception status indicator lights. The three serial port working modes are displayed in real time. Three in one interface asynchronous fiber modem supports hot swapping, ensuring that equipment maintenance does not interrupt system operation. Faults can be quickly located and resolved, reducing the cost of manual operation and maintenance.
In today's era of rapid industrial intelligence development, the stability, security and long-distance transmission capabilities of data have become the core demands of industrial communication. Three in one interface asynchronous fiber modems, as the bridge between RS485/422/232 devices and fiber networks, have completely solved the problems of short transmission distance, weak anti-interference ability and packet loss of traditional RS485/422/232. The three in one interface asynchronous fiber modems, with industrial-grade quality, flexible networking methods and convenient installation and maintenance, provide reliable guarantees for industrial communication in various industries.
As a professional manufacturer of three in one interface asynchronous fiber modems, we always follow the customer's needs and continuously optimize the product performance, providing customized solutions to help customers upgrade their industrial communication, reduce operation and maintenance costs, and enhance production efficiency. Whether you need standard model products or personalized customization requirements, we will offer you high-quality products and considerate services, working together for mutual benefit and promoting the development of industrial intelligence.

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