Industrial RS232/RS485/RS422 Fiber Modem Up to 80Km DIN-Rail Mount
Overview
The LNK-IRS93 Series is an industrial-grade serial-to-fiber converter supporting RS232,
RS485, and RS422 protocols. It extends serial communication up to 2 km on multimode
fiber or 80 km on single-mode fiber, ensuring reliable, interference-free data transmission in
harsh industrial environments. Ideal for process control, stage lighting (DMX512), and traffic
systems, it provides plug-and-play operation with hot-swappable support and built-in
surge/ESD protection.
Features
Versatile Serial Support: RS232, RS485, RS422, fully transparent
Long-Distance Fiber Transmission: Up to 80 km on SMF, 2–5 km on MMF
High-Speed & Adaptive: Up to 2 Mbps, auto baud-rate, no configuration needed
Stage Lighting Ready: Supports high-speed DMX512 communication
Rugged Design: DIN-Rail & wall-mount, -40°C to +75°C operation
Reliable Protection: 15kV ESD, 1500W/sec surge protection
Diagnostics: LED indicators for easy monitoring
Technical Indexes
| Model | LNK-IRS93 Series |
| Fiber Connector | SC standard, ST/FC/LC optional |
| Fiber Distance | 50/125um MMF: 2Km, 62.5/125um MMF: 5Km, 9/125 SMF:20/40/60/80Km |
| Serial Interface | Industrial Terminal |
| Signal Ports | 1Ch RS232 - 1Mbps 1Ch R485 - 1Mbps 2Ch RS485H- 2Mbps 2Ch RS485H can be grouped into 1Ch High Speed RS422 |
|  Standard
| EIA /TIA RS232/485/422 |
| Serial Distance | RS232: 15 meters, RS485/422: 1000 meters |
| Rate | Max 2Mbps |
| RS-232 | TXD, RXD, GND - Bi-directional |
| RS-485 | D+, D-, GND - Bi-directional |
| Power Supply | DC12~48V |
| Power rate | <5W |
| Static protection | 15KV electric static discharge (ESD) protection |
| Surge protection | 1500W/sec surge protection |
| Operation Temperature | -25°C to +75°C |
| Storage Temperature | -40°C to +85°C |
| Storage Humidity | 5%~90% non-condescending |
| Dimensions | 95(L)*70(W)*29(H) mm |
| Weight | 0.25kg/pcs |
Ordering Information
| Model | Description |
| LNK-IRS93-SFP | Industrial Serial RS232/RS485/RS422 with SFP port |
| LNK-IRS93-SCMM | Industrial Serial RS232/RS485/RS422 , SC MM 850nm, 550m |
| LNK-IRS93-SC20 | Industrial Serial RS232/RS485/RS422 , SC SM 1310nm, 20km |
| Mounting Options | ► Default DIN-Rail Bracket installed, Wall Mount Bracket is included. |
| Power Options | ► Power Supply is to be purchased separately |
Application
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Industrial RS232/RS485/RS422 Fiber Modem Up to 80Km DIN-Rail Mount Images
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