Siemens SIMATIC NET PROFIBUS User Manual
Active Components for RS-485 Networks
5-17
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
6GK1970-5CA20-0AA1 Release 2 05/2000
Connecting the PROFIBUS Cable
Connect the PROFIBUS LAN cable to the PROFIBUS terminator, as follows:
1. Cut the PROFIBUS cable to the required length.
2. Strip the insulation from the PROFIBUS cable as shown in Figure 5-10.
The braid shield must be folded back on to the cable. Only then can the shield
clamp serve as strain relief and as the shield contact.
clamp serve as strain relief and as the shield contact.
ÎÎÎ
ÎÎÎ
ÎÎÎ
8,5
16
10
ÎÎÎ
ÎÎÎ
8,5
16
10
16
Braid shield must be folded back!
e.g. standard cable
6XV1 830-0EH10
e.g. underground cable
6XV1 830-3FH10
Figure 5-10
Stripping the Insulation to Connect to the PROFIBUS Terminator
3. Connect the PROFIBUS LAN cable to the PROFIBUS terminator:
Connect the same wires (green/red for the PROFIBUS LAN cable) to the same
terminal A or B (in other words always connect terminal A with a green wire and
terminal B with a red wire or vice versa).
terminal A or B (in other words always connect terminal A with a green wire and
terminal B with a red wire or vice versa).
4. Tighten the shield clamps so that the shield makes good contact with the clamp.
Note
When installing the segment, make sure that no terminating resistor is activated
on the bus connectors if the two PROFIBUS terminators are included in the
PROFIBUS segment.
on the bus connectors if the two PROFIBUS terminators are included in the
PROFIBUS segment.