LFM series RS-232 / 422 / 485 serial optic fiber MODEM - LFMRS244

Lightem LFM series is a RS232 Fiber Modem that convert the RS232 / 422/ 485 serial signal over Fiber Optics interface. It can be used to connect RTU to HOST or SCADA controller. Optical fiber is used as medium to lengthen the transmissions distance. 



  • Support RS-232/RS-485/RS-422 interface
  • Asynchronous, point to point, rate up to 500Kbps
  • Support 9V-40V power input, consumption 2W
  • 1500W surge protection, 15KV static protection
  • RS-485/422 port support 32 node ( can tailor up to 128 Node upon request)
  • Working wavelength: 850nm(multimode), 1310nm(singlemode)
  • Auto test signal rate, zero delay auto transmit.


Parameters Values
Support EIA RS-232 standard
Data Rate
Transmission Distance
RS232 port 15m, RS485/422 port 1500m
Multimode 2km
Singlemode 20km
Working Temperature
-25°C to 70°C
Interface Type
8 bit terminal block
Multimode: ST/ SC/FC
Singlemode FC/SC/ST
Dimensions (LxWxH)
94 x 70 x 26mm

Related Products

© 2023 LIGHTEM® Group All rights reserved

Site Map

Contact Us