Siemens SIMATIC S5 Manual page 46

Installation Guidelines
2.2 Installing a SINEC L2 Bus Segment
This section explains how to install a SINEC L2 bus segment. A bus segment consists of the
following components:
• The bus cable
• The SINEC L2 bus connector or the SINEC L2 RS 485 bus terminal
• The SINEC L2 station, e.g., an S5-95U programmable controllers with SINEC L2 interface
Mounting the Bus Cable on the SINEC L2 Bus Connector
You must mount the bus cable on the SINEC L2 bus connector to connect an S5-95U to the SINEC
L2 bus.
Perform the following steps to establish the connection.
Lay out the cable and cut it.
Open the connector housing by loosening the housing screws.
Remove the housing cover.
Mount the bus cable as shown in Figure 2-3.
If required, switch on the terminating resistor.
Close the connector housing.
Now you can plug the SINEC L2 bus connector to the SINEC L2 interface of the S5-95U.
You can remove the connector without interfering with bus operation.
Figure 2-2. SINEC L2 Bus Connector with Degree of Protection IP 20
Note
When mounting the bus cable onto the SINEC L2 bus connector, make sure the data
line connected to terminal A of one bus connector ( Figure 2.3) is also jumpered with
terminal A of the other.
Analogously, the B terminals of the two bus connectors must also be interconnected
( Figure 2.3).
2-2
9-pin Sub D connector
Guides for the bus cable
Housing screw
S5-95U, SINEC L2
EWA 4NEB 812 6112-02