Control electronics for an agricultural or forestry vehicle

A method for switching on control electronics for an agricultural or forestry vehicle or an agricultural or forestry machine, comprising power connections at least for a first supply network and a second supply network, and at least one network connection, wherein the control electronics contain a communication circuit configured to transmit data via the network connection, the communication circuit supplied via the first supply network, and a logic circuit coupled to the communication circuit, and at least one control output for controlling an electrical load supplied via the second supply network, wherein the control electronics have at least one switch configured to connect the first supply network to the second supply network, the two supply networks having at least one defined minimum isolation impedance in a switched-off state of the at least one switch, the logic circuit supplied via the second supply network, the switch connected between the connection for the first supply network and the logic circuit, the logic circuit configured to provide a temporary supply via the first supply network, comprising the steps of:

• after an ignition signal of the agricultural or forestry vehicle or of the agricultural or forestry machine the first supply network is connected to a voltage supply,
• the switch of the control electronics is closed having been triggered by the voltage at the first supply network, and
• a temporary supply of the logic circuit is provided via the first supply network,
• confirming at the logic circuit the established supply via the communication circuit and the network connection, and
• subsequently connecting the second supply network to a voltage supply.