5.3 Connecting The Bus Cable To The Bus Connector; Properties Of The Sinec L2 Bus Cable; Boundary Conditions For Laying The Indoor Bus Cable - Siemens SIMATIC S5 Manual

Routing cables; connecting and installing bus connectors

5.3 Connecting the bus cable to the bus connector

Properties of the
bus cable
Rules for laying
cables
5-18
Use a two-conductor, twisted and shielded cable with the following
properties:
Table 5-4 Properties of the SINEC L2 bus cable
Features
Characteristic impedance
Loop resistance
Operating capacity
Attenuation
Permissible conductor cross-section
Permissible cable diameter
When you lay the bus cable, take great care to ensure that it is:
not twisted
not stretched and
not compressed.
When laying the bus cable indoors, moreover, you must observe the
following boundary conditions (d
Table 5-5 Boundary conditions for laying the indoor bus cable
Features
Bending radius for single bending
Bending radius for multiple bending
Permissible temperature range for laying
Temperature range, storage and stationary
operation
Values
approx. 135 to 160 Ω
(f = 3 to 20 MHz)
115 Ω/km
30 nF/km
0.9 dB/100 m (f = 200 kHz)
2
0.3 mm to 0.5 mm
8 mm 0.5 mm
= Outside diameter of cable):
O
Boundary conditions
80 mm (10 d
160 mm (20 d
– 5 C to + 50 C
– 30 C to + 65 C
ET 200 Distributed I/O System
EWA 4NEB 780 6000-02a
2
)
O
)
O