A bus arrangement includes: a coordinator; a first subscriber; a second subscriber; and a bus. The bus includes: a first signal line coupling the first subscriber and the coordinator; a second signal line connecting the second subscriber to the first subscriber; and at least one bus line connecting the coordinator to the first subscriber and the second subscriber. The coordinator is configured to send a message via the at least one bus line to the second subscriber with a command to activate the first subscriber via the second signal line. The first subscriber includes a first current sensor and the second subscriber includes a switchable current source. The second signal line couples the first current sensor with the switchable current source.