Power supply


Danger for persons, the environment or equipment

Bring the Bus Terminals system into a safe, de-energized state before starting mounting, disassembly or wiring of the Bus Terminals!

The supply connections Vk for the module electronics (K-bus) and supply connections for the field devices (power contacts) of a terminal block are galvanically separated from each other and can be supplied via separate 24 VDC voltage sources. If no electrical isolation is required between K-bus and field devices, the module electronics and the field devices can be supplied from a single voltage source.


Notes on fail-safe operation

For the trouble-free operation of a K-bus extension system, the ground connection of the K-Bus power supplies (Vk 0V) of all terminal blocks must be connected with each other via a low-resistance connection (see Figure). This also includes the ground connection of the K-bus power supply of the higher-level Fieldbus Coupler!

Power supply 1:
KL9020, KL9050 – Connection of the power supply