| 摘要 |
PURPOSE:To clarify the output current value of a terminal and to secure the action of a load by attaining an output current to the load to a preset value at turning on a local power source. CONSTITUTION:Signals in the prescribed format are transmitted from a central control unit 1 to each terminal in terms of time division. In each terminal, a signal processing circuit 5 compares address data of a transmission signal with its inherent address data. When they are coincident, control data is fetched and supplied to a current output circuit 18 through a fail safe circuit 7. Said circuit 18 supplies a current value based on the control data to a load, while a monitoring data in the controlled state is returned to the unit 1 by a latch circuit 13 and the processing circuit 5. A two-channel selector 17 sets an output current from the circuit 18 to a preset current value when a local power source 14 is turned on. |
