B&B Electronics BB2606 RS-232 to RS-422/485 Isolated Industrial Serial Converter

The B&B Electronics BB2606 is an industrial-grade, isolated serial converter designed to bridge RS-232 devices with RS-422 or RS-485 networks. Built for demanding industrial environments, the BB2606 provides reliable, noise-immune serial communication over longer cable runs and in electrically noisy settings where standard RS-232 connections would fail.

The BB2606 features 2,500V optical isolation between the RS-232 and RS-422/RS-485 sides, protecting connected equipment from ground loops, voltage spikes, and common-mode noise — a critical requirement in factory automation, process control, and building management systems.

Key Features:

• Conversion: RS-232 to RS-422 or RS-485 (selectable)
• Isolation: 2,500V optical isolation between RS-232 and RS-422/485 ports
• Data Rates: Supports baud rates up to 115.2 Kbps
• RS-485 Mode: 2-wire or 4-wire RS-485 operation supported
• Automatic Send Data Control: Built-in ASD (Auto Send Data) for RS-485 half-duplex operation — no RTS/CTS handshaking required
• Power: Powered via RS-232 port (no external power supply required) or optional external DC power
• Connector: DB-9 RS-232 interface; screw terminal RS-422/485 interface
• Industrial Design: DIN rail mountable housing suitable for panel or cabinet installation
• Operating Temperature: -40°C to +85°C (-40°F to +185°F)

The BB2606 is ideal for system integrators and industrial automation engineers who need to extend serial communications beyond the 50-foot RS-232 limitation, enabling RS-422 runs up to 4,000 feet and multi-drop RS-485 networks with up to 32 device nodes. B&B Electronics (now part of Advantech) is a globally trusted manufacturer of industrial serial communication and networking products.