Connections And Shielding; Network Termination - Lenze AC Tech MotionView OnBoard PositionServo PROFIBUS-DP Reference Manual

3.3.3 Connections and Shielding
The PositionServo PROFIBUS DP module is equipped with a D sub-type connector.
Always ensure that any connectors used on the network are fully approved for use with PROFIBUS DP.
Some available connector types have built in termination that allows the network to be isolated, which
can be very useful when fault finding. For data rates above 1.5Mbs, use a connector fitted with integrated
inductors.
3.3.4 Network Termination
In high speed fieldbus networks such as PROFIBUS DP it is essential to install the specified termination
resistors, i.e. one at both ends of a network segment. Failure to do so will result in signals being reflected
back along the cable which will cause data corruption.
PROFIBUS-DP uses active (powered) termination. Therefore it is strongly recommended that "stand alone"
active termination units are used to maintain the integrity of the network. If the PositionServo is used to
provide network termination, in the event of a power loss to the drive, network termination will also be
lost.
P R O F IB U S D P
+ T erm ination
P R O F IB U S D P
M aster
+ T erm ination
A B
P R O F IB U S D P
netw ork
M in 1 m
M aster
A B
P R O F IB U S D P
netw ork
M in 1 m
Figure 4a: Network without Active Termination
P ositionS ervo
P R O F IB U S D P
O ption M odule
D T ype
C onnector
A B A B
IN IN O U T O U T
Figure 4b: Network with Active Termination
Installation
P ositionS ervo
P R O F IB U S D P
O ption M odule
D T ype
C onnector
A B A B
IN IN O U T O U T
P R O F IB U S D P
netw ork
M in 1 m
P ositionS ervo
P R O F IB U S D P
O ption M odule
D T ype
C onnector
A B
IN IN
P R O F IB U S D P
netw ork
M in 1 m
7
P ositionS ervo
P R O F IB U S D P
O ption M odule
T erm inating
D T ype
C onnector
A B
IN IN
T erm ination
A B
O U T O U T
P R O F IB U S D P
netw ork
M in 1m
A ctive
M odule
A B
P94PFB01A