Fig. 17 Potential Connection Diagram Of An Ekxxxx - Beckhoff BK3 0 Series Documentation

Mounting and wiring
3.4.4.3 Configuration and Programming Interface
The standard Bus Couplers have an RS232 interface at the bottom of the front face. The miniature plug
connector can be connected to a PC using a connecting cable and the KS2000 configuration software. The
interface permits the Bus Terminals to be configured, for example adjusting the amplification factors of the
analog channels. The interface can also be used to change the assignments of the bus terminal data to the
process image in the Bus Coupler. The functionality of the configuration interface can also be reached via
the fieldbus using string communication facility.
3.4.4.4 Electrical isolation
The Bus Couplers / Bus Terminal Controllers operate with three independent potential groups. The supply
voltage feeds the K-bus electronics and the K-bus itself. The supply voltage is also used to generate the
operating voltage for the fieldbus interface.
Note: All the Bus Terminals are electrically isolated from the K-bus. The K-bus is thus electrically isolated
from everything else.
Fig. 17: Potential connection diagram of an EKxxxx
3.4.4.5 Power contacts
Power contacts supply (Up)
The bottom six connections with spring-loaded terminals can be used to feed the supply for the peripherals.
The spring-loaded terminals are joined in pairs to a power contact. The power supply for the power contacts
has no connection to the power supply for the Bus Couplers / Bus Terminal Controllers.
The spring-loaded terminals are designed for wires with cross-sections between 0.08 mm² and 2.5 mm².
The assignment in pairs and the electrical connection between feed terminal contacts allows the connection
wires to be looped through to various terminal points. The current load from the power contact must not
exceed 10 A for long periods. The current carrying capacity between two spring-loaded terminals is identical
to that of the connecting wires.
Power contacts
Three spring contacts of the power contact connections can be found on the right of the Bus Coupler / Bus
Terminal Controller. The spring contacts are hidden in slots so that they cannot be accidentally touched. By
attaching a Bus Terminal the blade contacts on the left hand side of the Bus Terminal are connected to the
spring contacts. The tongue & groove design of the top and bottom of the Bus Coupler / Bus Terminal
Controller and Bus Terminals enables secure fitting of the power contacts.
28 Version: 4.3.0 BK3xx0