# Connector

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The Profibus interface is DB9F (DB-9 pin female). It is galvanically isolated from the rest of the controller. The PIN allocation is given in the table below.

Table - Connector PIN Allocation

PIN | Signal | Description
1 | - | Not Used
2 | - | Not Used
3 | B Line | Positive RxD/TxD, RS485 level
4 | RTS | Request to send
5 | GND Bus | Bus Ground (isolated)
6 | +5V Bus Output | +5V termination power (isolated)
7 | - | Not Used
8 | A Line | Negative RxD/TxD, RS485 level
9 | - | Not Used
Housing | Cable Shield | Internally connected to the protective earth via cable shield filters according to the Profibus standard.

Caution!

Any current drawn from the pin 6 will affect the total power consumption. The Profibus connector must not be used for other application that may damage the Profibus interface.