Black Box Universal RS-232 to RS-422 485 Bidirectional Converter

  • Black Box
  • 14042640
  • IC820A
  • Temporarily Out-of-Stock
  • Call for next available delivery
Ordering Information
Black Box is a leading worldwide provider of infrastructure services, communications equipment, and technical support. The company's success is firmly rooted in the original vision: to create a "central, reliable source for hard-to-find products and technical skill". Black Box is unique, distinguished by its superior technical and customer services. With plans to continue expanding its services, Black Box is poised for excellence well into the future.


Selectable RS-422 operation with transmit and receive always enabled;

Set operating mode with four switches;

Automatic RS-485 driver control, so it works without any special programming for handshaking signals. Also enables transmitter from RS-232 TD signal and receiver when not transmitting;

Built-in bridging switches for 2- or 4-wire operation with no external jumpers to set;

Converts using either port power or power from an external 12-VDC power supply (not included). No external power is required if two RS-232 output handshake lines are available.