Siemens SIMATIC NET PROFIBUS manual Glossary

Glossary

Baud rate

–> Transmission rate

Bus

Common transmission path on which all nodes are connected; it has two defined ends.

In PROFIBUS, the bus is a twisted-pair cable or a fibre-optic cable.

Bus connector

Physical connection between the node and LAN cable.

In SIMATIC NET, there are bus connectors with and without sockets for the PG with the degree of protection IP 20.

Bus segment

³Segment

Bus system

All stations that are physically connected via a LAN cable form a bus system.

Chassis ground

Chassis ground includes all the interconnected inactive parts of equipment that must not carry a hazardous voltage even in the event of a fault.

Configuring

Configuring means entering a PROFIBUS configuration with all the specific para- meters using, for example, STEP 7 or COM PROFIBUS.

d.c. loop resistance

Total resistance of the outward and return line of a cable.

PROFIBUS Networks SIMATIC NET	Glossary-1
6GK1970-5CA20-0AA1 Release 2 05/2000