System Description S5-95U, SINEC L2
Bus Cable for SINEC L2
You need a two-wire, shielded, twisted cable as bus cable, that has the technical specifications
listed in Table 1-9.
Table 1-12. Technical Specifications of the Bus Cable
SpecificationFeature
Surge impedance
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
a
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a
a
a
a
a
a
a
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a
approx. 135 to 160 (f= 3 - 20 MHz)
Loop resistance
Effective capacitance
Attenuation
Permissible core cross section
Permissible cable diameter
115 /km
30 nF/km
0.9 dB/100 (f= 200 kHz)
0.3 mm
2
to 0.5 mm
2
8 mm ± 0.5 mm
The SINEC L2 standard cable matches these specifications (order number for indoor bus cable:
6XV1 830-0AH10, for buried bus cable: 6XV1 830-3AH10).
RS 485 SINEC L2 Repeater
Use the RS 485 SINEC L2 Repeater for the following tasks:
• To link individual SINEC L2 bus segments
• To add branches to your network
• To regenerate electrical signals on the network cables.
Each repeater that is connected to a bus segment limits the maximum possible number of stations
(32) by one for this bus segment. For example, when connecting two repeaters to a segment, you
can connect only 30 stations.
Two types of RS 485 SINEC L2 repeaters are available:
• For nominal voltage operation 24 V DC with external power supply (degree of protection IP 20 )
• For nominal voltage operation 24 V DC with external power supply (degree of protection IP 65)
1-24
EWA 4NEB 812 6112-02
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