Remote monitoring and remote control arrangement for an independent target location

An arrangement for facilitating remote monitoring and control of an independent target location, comprising:

• physical level devices (106, 107, 108, 109, 110, 111, 112, 211) adapted to at least acquire information at the target location, p1 a transceiver (511) adapted to exchange information with a remote central system, and
• between the physical level devices (106, 107, 108, 109, 110, 111, 112, 211) and the transceiver (511) a two-tier hierarchy of system elements, said two-tier hierarchy comprising a multitude of nodes (221) and at least one controller module (231, 231′), of which said nodes (221) are connected to said physical level devices (106, 107, 108, 109, 110, 111, 112, 211), and said controller module (231, 231′) is connected to said nodes (221) and to said transceiver (511);
• characterized in that it comprises
• a polarity- and topology-independent cable connection (222) between said controller module (231, 231′) and said nodes (221),
• in said controller module (231, 231′), means (503, 504, 505) for feeding an oscillating signal into said cable connection (222),
• in each node (221), means (301) for using a first part of an oscillating signal received from said cable connection (222) as operating power for the node (221) and means (302, 303, 304, 305, 307) for using a second part of an oscillating signal received from said cable connection (222) as received data, and
• in each node, means (312) for transmitting information by controllably changing an impedance of said cable connection (222).