Siemens SIMATIC NET PROFIBUS - Manual (Page 129)

Passive Components for RS-485 Networks
4-31
PROFIBUS Networks SIMATIC NET
6GK1970-5CA20-0AA1 Release 2 05/2000
A1, B1 A2, B2
Switch
“ON”
Switch
“OFF”
Incoming cable A1, B1
Outgoing cable A2, B2
Terminating resistor with
disconnect function
When you use the connector
at the end of a segment, set
the switch to “ON”
(disconnect function) When you use the connector
within a segment, set the
switch to “OFF”.
1
2
1. Undo the screw of the
strain relief. 2. Turn back the strain relief
clamp. 3. Lift the contact cover.
4. Fit the incoming cable into
the contact cover labeled A1,
B1 (remember to keep the
color coding consistent). 5. Press down the contact
cover firmly. 6. If you use the connector
within a segment, fit the
outgoing cable into the
contact cover labeled A2, B2.
2
1
7. Press down the contact
cover firmly. 8. Turn back the strain relief
clamp. 9. Tighten the screw of the
strain relief clamp.