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Advantech Automation BB4WSD9OTB Serial Converter

The Isolated In-line Serial Converters Models 4WSD90TB and 4WSD250TB are designed for reliable serial communication conversion, supporting RS-232 to RS-422 or RS-485 with switchable modes for 2-wire, 4-wire, and full duplex. They feature 2,000V two-way optical isolation for protection against power surges, spikes, and ground loops, making them suitable for harsh electrical environments. With remote data transmission up to 1,200 meters and data rates up to 115.2 kbps, these converters include removable terminal blocks for easy wiring, accept external power, and are ideal for industrial automation and communication networks.

Authorized Distributors
Source:DigiKey
Part No:BB-4WSD9OTB
Stock:58
Inv Date:05-30-2026
Price: Unit price: $143
Buy/RFQ:
Part No:BB-4WSD9OTB
Stock:119
Inv Date:05-31-2026
Price: Unit price: $143
Buy/RFQ:

Advantech Automation BB4WSD9OTB Serial Converter Specifications:

  • Data Rate: 115.2 kbps maximum
  • Connector: DB9 female or DB25 female depending on model
  • RS-232 signals: TD, RD, GND
  • RS-422/485 signals: TDA, TDB, RDA, RDB, GND
  • Input Power: 10-48 VDC external power supply
  • Current Draw: 28 mA at 12 VDC
  • Dimensions: 98 x 4.3 x 2.3 mm (4WSD9OTB), 9.8 x 5.5 x 2.3 cm (4WSD250TB)
  • Operating Temperature: 0°C to +70°C
  • Storage Temperature: -40°C to +85°C
  • Isolation Voltage: 2000V two-way optical isolation
  • Certifications: UL, CE, EN61000-4 series immunity tests

Buy the BB SMARTWORX Series Serial Converter: BB4WSD9OTB

Enhance your industrial communication setup with the BB SMARTWORX Serial Converter. Supporting RS-232 to RS-422 or RS-485 conversion with 2000V optical isolation, this reliable device ensures safe operation in harsh electrical environments. Its easy-to-wire removable terminal blocks and external power option make installation simple, while supporting distances up to 1200 meters and data rates up to 115.2 kbps. Perfect for automation and industrial networks, buy online today for robust and efficient serial communication.

Get BB SMARTWORX serial converter BB4WSD9OTB today—built for industrial communication and long-lasting durability.

Frequently Asked Questions

Where can I buy Advantech Automation BB4WSD9OTB?

You can click on the BUY or RFQ button to purchase BB4WSD9OTB from an authorized Advantech Automation distributor.

How do I troubleshoot issues or seek technical support for part BB4WSD9OTB?

You can download the BB4WSD9OTB datasheet or visit the Advantech Automation website for support.

Who is the manufacturer of BB4WSD9OTB?

Advantech Automation

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