Bus Interface Unit (BIU) FAQ

What is a BIU?

The BIU-Bus Interface Unit is a device that connects the Controller Unit and other devices in a NEMA TS-2 Cabinet Assembly for traffic signal control.


What standards must BIUs meet?

All EDI/Reno BIUs meet the NEMA TS2-2003 standard for the BIU configuration, and can operate in different modes depending on the Address Select inputs.


Are there different types of BIUs?

EDI/Reno has various BIU models that offer different features, such as detector rack communication and front panel communication ports. The BIU-700H is a half-width model for space-saving purposes.


What features do BIUs come with?

  • Front panel indicators that show the power status and the SDLC Port 1 activity.
  • Input and output specifications that define the voltage, current, impedance, and logic states of the signals. It also has optically isolated inputs for safety and noise immunity.
  • The BIU-700 series includes a 15 pin metal shell ā€œDā€ sub miniature type connector for SDLC Port 1, which is compatible with a standard 15 pin D type connector.

BIU Operation Manuals

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