Profibus Cabling; Fig. 13 Pin Assignment Socket/Plug Connector Fieldbus Box Modules - Beckhoff BC3150 Documentation

Mounting and wiring
The B318 series features a socket and a plug connector, i.e. this is where the PROFIBUS is routed in the
module. The supply voltage (+5 V
resistor ZS1000-1610 is only available as a plug connector.
The incoming PROFIBUS line should always end with a socket.
Fig. 13: Pin assignment socket/plug connector Fieldbus Box modules
Two T-pieces are available:
• ZS1031-2600 with +5 V
• ZS1031-2610 without +5 V
3.2.4

PROFIBUS cabling

Physical aspects of the data transmission are defined in the PROFIBUS standard (see PROFIBUS layer 1:
Physical Layer).
The types of area where a fieldbus system can be used is largely determined by the choice of the
transmission medium and the physical bus interface. In addition to the requirements for transmission
security, the expense and work involved in acquiring and installing the bus cable is of crucial significance.
The PROFIBUS standard therefore allows for a variety of implementations of the transmission technology
while retaining a uniform bus protocol.
Cable-based transmission
This version, which accords with the American EIA RS-485 standard, was specified as a basic version for
applications in production engineering, building management and drive technology. A twisted copper cable
with one pair of conductors is used. Depending on the intended application area (EMC aspects should be
considered) the screening may be omitted.
Two types of conductor are available, with differing maximum conductor lengths (see the RS-485 table).
22
) for the termination resistor is only present at the socket. The termination
DC
transfer for supplying the termination resistor
DC
transfer
DC
Version: 2.1.0 BC3150