Operation
EL2911
29
Version: 1.0.0
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 Sup-
ply Terminal if the current consumption of your terminals exceeds the maximum current that your Bus Cou-
pler 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 the connection of the power contacts
During the design of a Bus Terminal block, the pin assignment of the individual Bus Terminals must
be taken account of, since some types (e.g. analog Bus Terminals or digital 4-channel Bus Termi-
nals) do not or not fully loop through the power contacts.
Potential supply terminals (EL91xx, EL92xx) interrupt the power contacts and thus represent the
start of a new supply rail.
PE power contact
The power contact labelled PE can be used as a protective earth. For safety reasons this contact mates first
when plugging together, and can ground short-circuit currents of up to 125 A.
Summary of Contents for EL2911
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