Beckhoff ELX3351, Руководство по эксплуатации

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Mounting and wiring
ELX3351 23 Version: 1.3.1
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 point closes automatically when the pressure is released, holding the wire securely and
permanently.
Observe the requirements for connecting cables and cross sections according to IEC 60079-7 and IEC
60079-11. See the following tables for the suitable wire size width.
Power supply terminal ELX9560
Wire size width (single core wires) 0.14 ... 1.5 mm
2
Wire size width (fine-wire conductors) 0.14 ... 1.5 mm
2
Wire size width (conductors with a wire end sleeve) 0.14 ... 1.0 mm
2
Wire stripping length 8 ... 9 mm
Attention
Maximum screwdriver width for ELX9560
Use a screwdriver with a maximum width of 2 mm to wire the ELX9560 power supply termi-
nal. Wider screwdrivers can damage the terminal points.
All other ELX terminals ELXxxxx
Wire size width (single core wires) 0.08 ... 2.5 mm
2
Wire size width (fine-wire conductors) 0.08 ... 2.5 mm
2
Wire size width (conductors with a wire end sleeve) 0.14 ... 1.5 mm
2
Wire stripping length 8 ... 9 mm
3.6.3 Proper line connection
Always connect only one wire per terminal point.
When using fine-wire conductors it is recommended to connect them with wire end sleeves in order to
establish a safe, conductive connection.
In addition, make sure that the pin assignment is correct to prevent damage to the ELX terminals and the
connected devices.
3.6.4 Shielding and potential separation
Note
Shielding
Encoder, analog sensors and actors should always be connected with shielded, twisted
paired wires.
CAUTION
Observe installation requirements in areas of potentially explosive atmos-
pheres!
During installation, observe the requirements for cables, shielding and earth potential
equalization in areas of potentially explosive atmospheres according to IEC 60079-11,
IEC 60079-14 and IEC 60079-25.
WARNING
Ensure potential separation of the 24 V Ex busbar!
In any case, make sure that the galvanic isolation made by the ELX9560 between the 24 V
Ex busbar (power co24 V Ex and 0 V Ex) and other system potentials (if applicable
also functional or protective earths) is not removed.