Siemens SIMATIC NET PROFIBUS manual Off

Passive Components for RS-485 Networks

A1, B1 A2, B2

Incoming cable A1, B1

Outgoing cable A2, B2

Terminating resistor with disconnect function

Switch	Switch
“ON”	“OFF”
When you use the connector	When you use the connector
at the end of a segment, set	within a segment, set the
the switch to “ON”	switch to “OFF”.
(disconnect function)
1

2

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).

2.Turn back the strain relief clamp.

5.Press down the contact cover firmly.

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.

7.Press down the contact cover firmly.

2

1

8.Turn back the strain relief clamp.

9.Tighten the screw of the strain relief clamp.

PROFIBUS Networks SIMATIC NET	4-31
6GK1970-5CA20-0AA1 Release 2 05/2000