Why does my existing serial cable not work with the updated SpeedCheck controller?

This article details the two serial cable versions and which SpeedCheck controllers are supported.

Product applicability

The following products are discussed in this article:

  • SpeedCheck: SPEEDCHECK-15 and SPEEDCHECK-18 

With StreetHub or Applied Information option.


With the release of an updated controller in 2021 Q4 for the SPEEDCHECK-15 and SPEEDCHECK-18 radar speed signs we have also released an updated version of the serial cable used for remote connectivity with our StreetHub solution. If you have received a new controller and have an existing configuration that utilizes the 10-pin serial cable you may need to replace the cable for the updated version.


Updated Serial Cable

  • 4 wire version, supported by the updated and legacy controllers. Legacy controller requires the locking levers removed. 

Legacy Serial Cable 

  • 3 wire version, only supported by the legacy control board.

Controller Version Supported Serial Cable Cable Orientation



(phased out 2022 Q4)


(phased out 2022 Q4)

For more information on the updated SpeedCheck controller please see our article here.