Patent ID: 8668170
Filing Date: 2014-03-11
Classification: B61L

Abstract:
1. A railway signaling system for controlling a load, the system comprising: first autonomous controller with a first power output connectable to the load; a second autonomous controller which is redundant with the first controller such that there is no single point of failure, the second controller having a second power output connectable to the load; the first and second controllers operable in either an on-line mode wherein both power outputs provide power to the load or an off-line mode wherein a single power output provide power to the load; wherein the first and second controllers normally operate in the on-line mode to control the load such that current through the load is shared between the first and second controllers; wherein if one of the first or second controllers is operating off-line, the other controller continues to operate on-line to control the load, whereby control of the load is uninterrupted.