| 摘要 |
The present invention relates to a system for power distribution and communication over a two-wire network 21; 51. The system 20; 30; 50; 70 comprises: a control unit 22; CU (dedicated or distributed) configured to receive power from said two-wire network and provided with a transceiver circuitry connected to the two-wire network, a power converter unit 23; 31; 71 having a power converter 24 converts incoming voltage to a DC-voltage of less than 50 V and feeds the DC-voltage to the two-wire network, and a power fuse unit 25; 72 with a power fuse identity connected between the power converter 24 and the two-wire network 21; 51. The power fuse unit forwards the DC-voltage to the two-wire network and comprises: a transceiver circuitry connected to the two-wire network, and a fuse. The system is provided with means to monitor an amount of power consumed in the network, and means to activate the power switch in the power fuse unit 25; 72 when the amount of power consumed in the two-wire network exceeds predetermined limits |
