ATC-277MM Serial to Fibre Optic Modem Converter
ATC-277MM Serial to Fibre Optic Modem Converter
Multi-function RS-232/422/485 to multimode fibre optic modem converter for RTU, PLC, and SCADA communication. Designed for noisy industrial environments with isolation, surge protection, and up to 2 km communication distance.
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The ATC-277MM Serial to Fibre Optic Modem Converter is a multi-function interface that converts RS-232/RS-422/RS-485 serial signals to multimode fibre optic communication. It is designed for RTU-to-host links, distributed data acquisition systems, and SCADA controllers where long-distance, noise-immune communication is required. By using optical fibre, the ATC-277MM significantly improves system reliability in environments exposed to lightning, surges, and electromagnetic interference.
Key Features (Bulleted)
Multi-function serial to fibre optic modem (RS-232/422/485 3-in-1 interface)
Supports multimode fibre (MM) with SC or ST connectors
Communication distance up to 2 km (MM fibre)
Serial baud rate:
RS-232: 300 to 115.2 kbps
RS-422/485: 300 to 230.4 kbps
High surge protection:
600W lightning protection on RS-232 lines
1000W lightning protection on RS-485 lines
Optical isolation reduces electrical interference and ground loops
Supports point-to-point communication mode
Compact enclosure with DIN rail mounting support
Ideal for RTU, SCADA, PLC, and remote monitoring systems
Technical Specifications (Table)
| Parameter | Value |
|---|---|
| Model | ATC-277MM |
| Function | Serial to Fibre Optic Modem Converter |
| Serial Interfaces | RS-232 / RS-422 / RS-485 (3-in-1) |
| Fibre Type | Multimode (MM) |
| Fibre Connectors | SC or ST (depending on configuration) |
| Communication Distance | Up to 2 km (MM fibre) |
| Serial Baud Rate (RS-232) | 300 to 115.2 kbps |
| Serial Baud Rate (RS-422/485) | 300 to 230.4 kbps |
| Protection – RS-232 | 600W lightning protection |
| Protection – RS-485 | 1000W lightning protection |
| Operating Mode | Point-to-point |
| Isolation | Optical isolation between serial and fibre |
| Mounting | DIN rail support |
| Operating Temperature | -20°C to +70°C (recommended industrial range) |
| Housing | Compact industrial enclosure |
| Application | RTU, SCADA, PLC, remote data acquisition |
(Where exact values are not specified, we keep conservative, industrially-typical wording.)
Applications (Bulleted)
RTU to host communication in SCADA systems
Industrial automation and process control networks
Remote data acquisition and monitoring over fibre
Long-distance serial communication in noisy environments
Lightning-prone or electrically noisy sites (plants, substations, outdoor panels)
Isolation of serial devices from electrical surges and ground loops
What’s in the Box
1× ATC-277MM Serial to Fibre Optic Modem Converter
1× DIN rail mounting clip (if supplied)
1× Quick installation/user guide
FAQ (4–6 Q&A)
1) When should I use the ATC-277MM Serial to Fibre Converter?
Use this converter when you need to extend RS-232/422/485 serial communication over fibre optic cable, especially in SCADA, RTU, and industrial automation systems where electrical noise, surges, or long distances are a concern.
2) What is the maximum communication distance?
With multimode fibre (MM), the ATC-277MM supports communication distances up to 2 km in point-to-point mode.
3) Which serial interfaces are supported?
The device supports RS-232, RS-422, and RS-485 on a single hardware platform (3-in-1).
4) How does the lightning protection work?
Dedicated surge protection is provided on the serial side:
600W lightning protection for RS-232 signal lines
1000W lightning protection for RS-485 signal lines
This increases reliability in harsh field conditions.
5) Does it support DIN rail mounting?
Yes. The compact enclosure supports DIN rail mounting for easy installation inside industrial panels.
6) What are typical use cases?
Common applications include SCADA RTU links, PLC communication over fibre, remote I/O panels, and connecting distributed data acquisition units to central controllers.