Beckhoff EL6900, Operating Instructions Manual

Page: 23 / 62

Operation
EL6900 23 Version: 2.2.0
Removal
Fig. 9: Removal of mounting rails
1. Carefully pull the orange-colored lugs approximately 1 cm out of the disassembled terminal, until they
protrude loosely. The lock with the mounting rail is now released for this terminal, and the terminal can
be pulled from the mounting rail without excessive force.
2. Grasp the released terminal with thumb and index finger simultaneous at the upper and lower grooved
housing surfaces and pull the terminal away from the mounting rail.
4.2.4 Electrical installation
4.2.4.1 Connections within a Bus Terminal block
The electric connections between the Bus Coupler and the Bus Terminals are automatically realized by
joining the components:
Spring contacts (E-bus)
The six spring contacts of the E-bus deal with the transfer of the data and the supply of the Bus Terminal
electronics.
Note
Observe the E-bus current
Observe the maximum current that your Bus Coupler can supply to the E-bus! Use the
EL9410 Power Supply Terminal if the current consumption of your terminals exceeds the
maximum current that your Bus Coupler can feed to the E-bus supply.
Power contacts
The power contacts deal with the supply for the field electronics and thus represent a supply rail within the
Bus Terminal block. The power contacts are supplied via terminals on the Bus Coupler.
Note
Note the connection of the power contacts
During the design of a Bus Terminal block, the pin assignment of the individual Bus Termi-
nals must be taken account of, since some types (e.g. analog Bus Terminals or digital 4-
channel Bus Terminals) do not or not fully loop through the power contacts.
Power Feed Terminals (EL91xx, EL92xx) interrupt the power contacts and thus represent
the start of a new supply rail.