Technical specifications 
  8.5 Interface description 
Basic Panels 
Operating Instructions, 04/2012, A5E02421799-03 
141 
8.5  Interface description 
8.5.1  Power supply 
Plug connector, 2-pin 
 
 
Pin number  Assignment 
1  +24 VDC (L+) 
2  GND 24 V (M) 
8.5.2  PROFIBUS (Sub-D RS422/485) 
Name of interface on HMI device: X2 
Sub-D socket, 9-pin, with screw lock 
 
 
Pin  Assignment for the RS 422  Assignment for the RS 485 
1  n. c.  n. c. 
2  GND 24 V  GND 24 V 
3  TxD+  Data channel B (+) 
4  RD+  RTS 
5  GND 5 V, floating  GND 5 V, floating 
6  +5 VDC, floating  +5 VDC, floating 
7  +24 VDC, out (max. 100 mA)  +24 VDC, out (max. 100 mA) 
8  TxD–  Data channel A (–) 
9  RxD–  NC