Siemens SIMATIC NET PROFIBUS manual Plugging the Bus Connector into the Module

Passive Components for RS-485 Networks

4.6Plugging the Bus Connector into the Module

Fitting the Bus Connector

To fit the bus connector, follow the steps outlined below:

1.Plug the bus connector into the module.

2.Screw the bus connector to the module.

3.If the bus connector is located at the start or end of a segment, you must activate the terminating resistor (switch setting ON”) (see Figure 4-26).

It is not possible to activate the terminating resistor on the bus connector 6ES7 972-0BA30-0XA0.

Note

Remember the following:

SBy activating the terminating resistor, the outgoing LAN cable is disconnected from the incoming LAN cable.

SStations equipped with a terminating resistor must always be supplied with voltage when the network starts up and during operation.

Terminating resistor activated

on

off

Terminating resistor not activated

on

off

Figure 4-26 Bus Connector (6ES7 972-0B.11-...): Terminating Resistor Activated and deactivated

Removing the Bus Connector

If the LAN cable is connected through, you can remove the bus connector from the PROFIBUS-DP interface at any time without interrupting data traffic on the bus.

4-46	PROFIBUS Networks SIMATIC NET
	6GK1970-5CA20-0AA1 Release 2 05/2000