| 摘要 |
An electrical load control circuit comprises a plurality of load switch means, each of which is operably connected to an electrical load, and a plurality of corresponding electrical load controllers (1-4). Each controller (1-4) includes processing means having an output operably connected to the load switch means, a zone control input operably connected by a pair of zone control conductors (7, 8) to the corresponding terminal of at least one other controller (1-4), and a connection terminal operably connected to the corresponding terminal of at least one other controller (1-4). The processing means of each controller (1-4) is arranged to sense the presence of a connection between the zone control conductors to apply a load switch command to a pre-programmed selection of connected load controllers via the connection terminal, or to sense the application of an identified load switch command to the connection terminal and thereupon to apply a load switch command to the output. |
