• Login
5 Year Warranty

BB-485OI9TB Serial Converter, RS-233 DB9F to RS-422/485 TB

  • RS-232 to RS-422/485 Converter
  • 1.5 KV Isolation
  • DB9 F / TB
  • RS-232 side powered by RTS / CTS
  • 12 VDC power supply (required, not included, sold separately)
  • cULus Recognized
Certifications CE cUL FCC
In Stock: : 20
Add to Cart Buy Now

More Description

Model BB-485OI9TB, isolated converter, converts unbalanced, full-duplex RS-232 signals to balanced full-duplex (4-wire) RS-422/485 or half-duplex (2-wire) RS-485 signals. The converter provides 1,500 Volts RMS optical isolation for data lines and ground (and connected devices) between the RS-232 and RS-422/485 signals. RS-232 port has a female DB9 connector. RS-422/485 port has a 6-position terminal block. The RS-232 side of the converter draws power from the handshake lines (DTR, RTS). At least one handshake line must be asserted (raised high) to power the RS-232 side. The RS-422/485 side must be powered by an external 12 VDC power supply (not included, sold separately).

Accessory Products



Serial Converter, RS-233 DB9F to RS-422/485 TB

Accessory Products

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

  • Serial Port Adapter, RS-232 DB9 M / M, Null Modem

  • 12VDC Output, 0.5A Current, 6W Power, Stripped/Tinned



Products + {{numOfSelectedRelatedProducts}}Accessory Products

Subtotal {{subTotalStr}}

Extended Specifications


  • Technology Serial
  • Power 10-14VDC
  • Mounting Inline
  • Temperature 0 to 50C
  • Isolation 1.5kV
Office Locations


Monday-Friday, 7am-5pm CST

Contact Advantech