TESTO 6681 Profibus Instruction Manual page 45

1.3.4.2 Electrical connection
To simplify the connection of the transmitter to the Profibus, the Profibus
module of the testo 6681 has pre-fabricated plug-and-socket connections.
Using the connector (2) and the socket (1) (accessory 0554 6683), the
testo 6681 can be connected to the existing cable infrastructure in the linear
structure of the Profibus.
The pin-assignment of the connector and the socket as per IEC 60947-5-2 is
as follows:
When using both plug-in connections, the communication of
the bus is necessarily interrupted during the integration of the
removal of a field instrument.
testo 6681 Profibus
Pin 1 Supply voltage VP (5 V)
Pin 2 RxD/TxD-N A line
Pin 3 Reference potential to VP
(DGND)
Pin 4 RxD/TxD-N B line
Pin 5 Shield or protective earth
- 1.3 Commissioning 45