| 摘要 |
<p>A communication system in a domestic heating system allows multiple independent parameters to be ready by the controller (1) via a single sensor input channel of two wires (2 or 6). Accordingly, the A/D conversion operation is effected at the controller, ensuring more accurate conversion than if done in the remote units (3, 7); moreover, the cost of each remote unit is thereby reduced. Furthermore, once the 'channel' between the controller and a given remote unit is selected, it can be treated like any other sensor channel by the controller.</p> |
