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 Descriptions
