Operation
EL290428 Version: 3.2.2
5.2.3.2 Overvoltage protection
If protection against overvoltage is necessary in your plant, provide a surge filter for the voltage supply to the
Bus Terminal blocks and the TwinSAFE terminals.
5.2.3.3 Wiring
Fig.8: Connection of a cable to a terminal point
Up to eight terminal points enable the connection of solid or finely stranded cables to the Bus Terminal. The
terminal points are implemented in spring force technology. Connect the cables as follows:
1. Open a terminal point by pushing a screwdriver straight against the stop into the square opening
above the terminal point. Do not turn the screwdriver or move it alternately (don't toggle).
2. The wire can now be inserted into the round terminal opening without any force.
3. The terminal closes automatically when the pressure is released, holding the wire safely and
permanently.
See the following table for the suitable wire size width.
Wire size width (single core wires) 0.08 ... 2.5mm
2
Wire size width (fine-wire conductors) 0.08 ... 2.5mm
2
Wire size width (conductors with a wire end sleeve) 0.14 ... 1.5mm
2
Wire stripping length 8 ... 9mm
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