Siemens SIMATIC NET Operating Instructions Manual - Page 8

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Siemens SIMATIC NET Operating Instructions Manual
Introduction
1.2 Description of the product
Operator controls
The bus terminal consists of the following elements and controls:
● 1 terminal block with 6 terminals for wires with a cross-sectional area of ≤ 1.5 mm
With this terminal block you can connect the incoming and outgoing bus cable and, if
necessary, Protective Earth (PE).
● Screw down clamps for shield contact
● 2 switches:
– right-hand switch ("Termination")
– left-hand switch
● A 1.5 m long spur line with a 9-pin D-sub male connector
You can connect a DTE directly to this spur line.
Figure 1-1
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With the right-hand switch, you can terminate the end of an incoming, electrical
segment (A1, B1) with the characteristic impedance (switch on). At the same time, the
outgoing, electrical segment (A2, B2) is interrupted.
With the left-hand switch you can set the range of the transmission speed 9.6 kbps...
1.5 Mbps and 3 Mbps...12 Mbps.
Operator controls
Operating Instructions, 07/2013, C79000-G8976-C333-01
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12M bus terminal