Siemens SIMATIC TI500 Spezifikationen Seite 194

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6-29
Cabling and Wiring the System
SIMATIC 545/555/575 System Manual
4. Remove a 0.75-inch (19 mm) portion of the cable shielding to expose the
two signal wires.
To ensure that the connection is properly grounded, you must leave
enough exposed cable shielding (0.5 inches, 13 mm) to make a proper
contact with the metal cable guide on the connector. See Figure 6-19.
5. Remove 0.25 inches (6 mm) of insulation at the wire ends.
6. Insert the signal wires into the cable terminals.
Be sure to connect the same wire color to the TX/RX+ pin for every
device throughout your system. Crossing the wires at any point creates
communications problems.
7. Set the termination switch to the correct position. See Figure 6-20.
Switch position ON
(termination and
bias enabled)
ABAB
ON
OFF
Switch position OFF
(termination and
bias disabled)
ABAB
ON
OFF
A. Attaching connector at cable end
B. Attaching connector to midpoint of cable
Figure 6-20 Attaching Connector and Selecting Termination
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