Siemens SIMATIC NET PROFIBUS Owner's Manual page 129

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