Siemens SINUMERIK 840Di - Page 59

06.03
2.3 MCI board extension
2-59
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
2.3.3 Interface description
Interface overview
Table 2-5 Interfaces of the MCI board
Interface description
Connector
designation
Connector type
Cable distributor X121 37-pin Sub-D connector
MCI board extension X4 26-pin plug connector
Pin assignment: X121 Cable distributor
Maximum cable length: 25m for all functions
Special features: Four binary inputs (isolated)
Four binary outputs (isolated)
Two measuring inputs (isolated)
Two handwheels (non-isolated)
Table 2-6 Pin assignment of connector X121
Pin Signal designation Signal
type
Pin Signal designation Signal
type
1 M24EXT VI 20 P24EXT VI
2 M24EXT VI 21 P24EXT VI
3 OUTPUT 1 O 22 OUTPUT 3 O
4 OUTPUT 0 O 23 OUTPUT 2 O
5 INPUT 3 I 24 MEXT VI
6 INPUT 2 I 25 MEXT VI
7 INPUT 1 I 26 MEXT VI
8 INPUT 0 I 27 MEXT VI
9 MEPUS 0 I 28 MEPUS 1 I
10 MEPUC 0 I 29 MEPUC 1 I
11 MPG1 XA I 30 MPG1 A I
12 MPG1 5V VO 31 MPG1 0V VO
13 MPG1 5V VO 32 MPG1 0V VO
14 MPG1 XB I 33 MPG1 B I
15 MPG0 XA I 34 MPG0 A I
16 MPG0 5V VO 35 MPG0 0V VO
17 MPG0 5V VO 36 MPG0 0V VO
18 MPG0 XB I 37 MPG0 B I
19 Not assigned
2 Hardware Descri
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tions