Power control device for a multiplicity of independently operable loads (2a, 2b) of a two-phase AC lighting network, which power control device has, for the independently operable loads, a common monitoring arrangement and separate power circuit arrangements (1a, 1b), wherein the power circuit arrangements (1a, 1b) each have power semiconductors (1a1, 1b1), an actuating circuit (1a2, 1b2) formed as a driver circuit (1a2, 1b2) that controls the power semiconductors (1a1, 1b1) into an on or off state, and an associated power supply unit circuit (1a3, 1b3), and wherein the monitoring arrangement has a further power supply unit circuit, wherein the power supply unit circuits (1a3, 1b3, 3a) have separate reference potentials for the power circuit arrangements (1a, 1b) and the monitoring arrangement, specifically such that the reference potentials for the power supply unit circuits of the power circuit arrangements are derived from a first lighting network phase, and the reference potential for the power supply unit circuit of the monitoring arrangement is derived from the second lighting network phase, wherein the reference potential for the power supply unit circuit of the monitoring arrangement respectively differs from that of the power circuit arrangements, and wherein an optical coupler (4a, 4b) or a transformer is respectively provided between the monitoring arrangement and the actuation circuits for the transmission of actuation signals from the monitoring arrangement to the actuation circuits (1a2, 1b2). which power control device has, for the independently operable loads, a common monitoring arrangement and separate power circuit arrangements (1a, 1b), a common monitoring arrangement and separate power circuit arrangements (1a, 1b), wherein the power circuit arrangements (1a, 1b) each have power semiconductors (1a1, 1b1), an actuating circuit (1a2, 1b2) formed as a driver circuit (1a2, 1b2) that controls the power semiconductors (1a1, 1b1) into an on or off state, and an associated power supply unit circuit (1a3, 1b3), and wherein the monitoring arrangement has a further power supply unit circuit, the power circuit arrangements (1a, 1b) each have power semiconductors (1a1, 1b1), an actuating circuit (1a2, 1b2) formed as a driver circuit (1a2, 1b2) that controls the power semiconductors (1a1, 1b1) into an on or off state, and an associated power supply unit circuit (1a3, 1b3), and wherein power semiconductors (1a1, 1b1), an actuating circuit (1a2, 1b2) formed as a driver circuit (1a2, 1b2) that controls the power semiconductors (1a1, 1b1) into an on or off state, and an associated power supply unit circuit (1a3, 1b3), and wherein formed as a driver circuit (1a2, 1b2) that controls the power semiconductors (1a1, 1b1) into an on or off state, and an associated power supply unit circuit (1a3, 1b3), and wherein the monitoring arrangement has a further power supply unit circuit, wherein the power supply unit circuits (1a3, 1b3, 3a) have separate reference potentials for the power circuit arrangements (1a, 1b) and the monitoring arrangement, for the power circuit arrangements (1a, 1b) and the monitoring arrangement, specifically such that the reference potentials for the power supply unit circuits of the power circuit arrangements are derived from a first lighting network phase, and the reference potential for the power supply unit circuit of the monitoring arrangement is derived from the second lighting network phase, the reference potentials for the power supply unit circuits of the power circuit arrangements are derived from a first lighting network phase, and the reference potential for the power supply unit circuit of the monitoring arrangement is derived from the second lighting network phase, wherein the reference potential for the power supply unit circuit of the monitoring arrangement respectively differs from that of the power circuit arrangements, and wherein an optical coupler (4a, 4b) or a transformer is respectively provided between the monitoring arrangement and the actuation circuits for the transmission of actuation signals from the monitoring arrangement to the actuation circuits (1a2, 1b2).