Connectors On The Niu; Profibus Connector - GE VersaPoint IC220PBI002 User Manual

Connectors on the NIU

Profibus Connector

A 9-position, D-SUB connector connects the NIU to the Profibus cable.
Pin
1
2
3
4
5
6
7
8
9
Line Terminal Resistors
Since Profibus is a serial bus system in a star-tree structure, the individual
branches must be terminated with a terminal resistor. The NIU does not have an
integrated resistor of this type. Many Profibus connectors are available with an
integrated, switchable resistor. Please contact your GE Intelligent Platforms
distributor to determine availability.
GFK-1911B Chapter 2 The Profibus NIU
Assignment
Reserved
Reserved
RxD/TxD-P (+ receive/send data), cable B
CNTR-P (control signal for repeater), direction control
DGND (reference potential up to 5 V)
VP (supply voltage +5 V for terminal resistors)
Reserved
RxD/TxD-N (– receive/send data), cable A
Reserved
2
2-7