Electrical Installation; Fig. 8 Disassembling Of Terminal - Beckhoff EL9930 Operating Instructions Manual

Profisafe segment end terminal

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Disassembly

Fig. 8: Disassembling of terminal

Each terminal is secured by a lock on the mounting rail, which must be released for disassembly:

1. Pull the terminal by its orange-colored lugs approximately 1 cm away from the mounting rail. In doing

so for this terminal the mounting rail lock is released automatically and you can pull the terminal out of

the bus terminal block easily 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 out of the bus terminal block.

Connections within a bus terminal block

The electric connections between the Bus Coupler and the Bus Terminals are automatically realized by

joining the components:

• The six spring contacts of the K-Bus/E-Bus deal with the transfer of the data and the supply of the Bus

Terminal electronics.

• 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 (up to 24 V)

or for higher voltages via power feed terminals.

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

Terminals) do not or not fully loop through the power contacts. Power Feed Terminals (KL91xx,

KL92xx or EL91xx, EL92xx) interrupt the power contacts and thus represent the start of a new

supply rail.

4.1.5