Siemens SINUMERIK 840Di - Page 49

06.03
2.2 MCI board
2-49
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
Interface description MPI interface (X111):
S Connection: 9-pin SUB-D socket connector
S Pin assignment.
Table 2-4 Pin assignment: MPI interface (X111)
Pin Designation Type
1)
Function
1 Not assigned – –
2 Not assigned – –
3 RS-MPI B RS-485 differential signals
4 RTS O Request to Send
5 GNDext VO External ground
2)
6 P5ext VO Ext. 5V power supply
2)
7 Not assigned – –
8 XRS-MPI B RS-485 differential signals
9 Not assigned – –
1) VO Voltage Output
O Output
B Bidirectional
2) Pins 5 and 6 are only allowed to be used to supply power to the bus terminators
S Connection cable
see Subsection 3.3.1, Page 3-131.
Notice
The MPI and PROFIBUS DP interfaces are isolated both to one another and
with regard to the PCU.
MPI interface
(X111)
2 Hardware Descri
p
tions