9-Pole Sub-D Connector - Burkert 8644 AirLINE Instructions De Service

9-pole SUB-D connector

Configuration of the 9-pole SUB-D connector
As a general rule, a 9-pole SUB-D connector with pins is used in the PROFIBUS. In the profibus DP field
bus coupler, the matching part (socket) is always present. In the first and last plugs of a segment, a
closing resistor of 220 ohm and two terminating resistors of 390 ohm must be present. The A line (RXD/
TXD-P) is always earthed via one terminating resistor, the B line (RxD/TxD-P) is always connected to
+5V via the other one. These resistors must be provided in the plug (e.g. Phoenix Contact SUNCON-
PLUS-PROFIB, Art. no. 27 44 34 8).
Pin No.
(socket in device, plug on cable)
1
2
3
4
5
6
7
8
9
Type 8644
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9-pole SUB-D connector

Designation
n. c.
n. c.
RxD / TxD-P
CNTR-P
DGND
VP
n. c.
RxD/TxD-N
n. c.
Meaning
-
-
Receive / send data P (+) (conductor B)
Control signal for repeater (+), direction control
Reference potential of 5 V
Supply voltage + 5 V for closing resistors
-
Receive / send data N (+) (conductor A)
-
C
OMMISSIONING
CO 3