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Universal Converter

US Prices
CDN Prices

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General Product Information

The 4WSD9TB Universal Converter provides RS-232 to RS-422/RS-485 conversion using either port-power or an external power supply. Unlike converters which require programming hardware handshaking signals to control RS-485 or RS-422 operation, the 4WSD9TB provides automatic control. The operating mode is set with 4 switches.

The 4WSD9TB is powered by the RS-232 signal lines. If this does not provide enough power, a DC jack is provided to connect a 12VDC supply.

Features and Details

  • Selectable RS-485 2-wire or 4-wire operation
  • Selectable RS-422 operation
  • DB9 Female RS-232 Connection
  • Terminal blocks for RS-422/RS-485
  • Port power or External 12V DC power(jack)
  • Automatic RS-485 Driver Control - works without special programming
  • Data rates up to 115.2 Kbps
  • FCC Class B
  • CE


Power Range AC: 0 to 0 Temp Range: 0 to 70
Mounting / Packaging: In Line UL: No
Class 1 Division 2: No Modbus: Yes
Automatic Send Data Control: Yes Power Range DC: 12 to 12
Power Source: Port, External Power Max AC: No
RS-232: No RS-422: No
RS-485 2 Wire: Yes RS-485 4 Wire: Yes
TTL: No Current Loop: No
Multi-mode Fiber: No Single Mode Fiber: No
Isolation: No 3-Way Isolation: No
Brand: B&B Electronics  

Buy 4WSD9TB on-line:
USA Office

Address: 1480 Gulf Road, Suite 837,
PO Box 1364
Point Roberts, WA 98281

Western Canada - Vancouver BC

Tel:1.800.663.6001 or 1.604.925.6150
Address: 2454 Haywood Ave
West Vancouver, BC V7V 1Y1

Eastern Canada - Markham, Ontario

Tel:1.800.465.0164 or 1.905.513.7027