CMU Boards

CMU (Conflict Monitor Unit) is the general term for conflict monitoring devices, while MMU (Malfunction Management Unit) is a more advanced designation used under NEMA TS-2 and ATC standards. MMUs offer additional programmable features, dual-ring operation support, and broader diagnostic capabilities compared to earlier CMU designs.

CMU Boards must comply with applicable traffic signal standards including NEMA TS-1, NEMA TS-2, ATC Cabinet, CALTRANS 33x, and ITS Cabinet specifications. The required standard depends on the cabinet type and jurisdiction. TCC supplies units from EDI and Reno A&E that meet all major industry compliance requirements.

TCC offers several models including the MMU-1600D, MMU2-1600G, and MMU2-1600GE from EDI and Reno A&E. The MMU2-1600GE supports programmable eight-phase dual-ring operation. MMU Program Cards are also available for efficient cabinet testing and programming.

Compatibility depends on your cabinet type — NEMA TS-1, NEMA TS-2, ATC, CALTRANS 33x, or ITS Cabinet. Review your cabinet specifications and local agency requirements. TCC's factory-trained technical staff can help you identify the correct CMU Board for your specific application and jurisdiction.

Yes. MMU Program Cards, available through TCC, are specifically designed to facilitate cabinet testing, programming, and diagnostics. They streamline the setup and verification process for traffic signal control cabinets, reducing field time and improving accuracy during commissioning or maintenance activities.

TCC sources CMU Boards from EDI (Electronic Design Inc.) and Reno A&E, both trusted manufacturers with proven field reliability. These brands are part of a broader family that includes Carmanah, Polara, and Diablo Controls, all supported through EDI Traffic's technical documentation and support resources.