• Login
5 Year Warranty

BB-9PFLST Serial Converter, RS-232 MODEM DB9 F to MM Fiber ST

  • EMI/RFI transient immunity to surges, spikes, ground loops
  • Data rate: 115.2 kbps; up to 4 km range
  • Computers and terminals use one modem without switching
  • Quick, inline installation
  • Note: must use in pairs; one at each end of fiber transmission line
  • Port-powered, no external power required
  • Optional external powering (power supply not included, sold separately)
Certifications CE FCC RoHS

Add to Cart Buy Now

More Description

Model 9PFLST allows any two pieces of RS-232 asynchronous serial equipment to communicate full-duplex over two multi-mode fibers. Typical distances up to 2.5 miles (4 km) are possible with no external power required. The 9PFLST supports both data signals at up to 115.2 kbps as well as the RTS/CTS handshake lines. This means the 9PFLST can replace short haul modems and isolators when connecting remote devices, while providing the EMI/RFI and transient immunity of optical fiber. RS-232 connections are provided on the same DB9 female connector, while the multi-mode fiber is connected via two ST connectors. The unit is port powered by the RS-232 Transmit Data and handshake lines. When handshake lines are not available, or when using a low power RS-232 port, the 9PFLST can be powered by an external 12VDC supply, drawing 50 mA maximum.

Accessory Products



Serial Converter, RS-232 MODEM DB9 F to MM Fiber ST

Accessory Products

  • Serial Cable, RS-232 DB9 M to DB9 F, 1.8 m / 6 ft

  • 12VDC Output, 0.5A Current, 6W Power, J



Products + {{numOfSelectedRelatedProducts}}Accessory Products

Subtotal {{subTotalStr}}

Extended Specifications


  • Technology Serial
  • Power 12VDC
  • Mounting Inline
  • Serial Type RS-232
  • Serial Connector DB9 Female
  • Fiber Type Multi-mode
Office Locations


Monday-Friday, 7am-5pm CST

Contact Advantech