| 摘要 |
A digital data computer processing system useful particularly for railway safety engineering which includes at least two central processing units with related input and output units which are controlled by a common pulse current supply and which uses a plurality of comparator units that receive inputs from the two computer processing units as well as an input from the pulse current supply which is fed in series through all of the comparator units and back to the pulse current supply such that when such signal returns through all of the comparator units to the pulse current supply it continues to enable both computer units and supply pulses and power to them. If the output signal from the pulse current supply does not return to the pulse current supply through the series connected comparators, the pulse current supply then disconnects power and pulses to the processing units so that error signals will not be provided to a controlled process. Two separate independent power supplies individually drive the two processing units. |
