Siemens SINUMERIK 840Di - Page 67

06.03
2.4 MCI board extension slot variation (SW 11.00 and higher)
2-67
 Siemens AG, 2003. All rights reserved
SINUMERIK 840Di Manual (HBI) – 06.03 Edition
Table 2-9 Pin assignment: Interface X121
Pin FunctionType
1)
Designation
30 MPG1_A I input 2nd Input handwheel, track A
31 M VO Hand wheel PS ground, TTL handwh. ground
32 M VO Hand wheel PS ground, TTL handwh. ground
33 MPG1_B I input 2nd Input handwheel, track B
34 MPG0_A I input 1st Input handwheel, track A
35 M VO Hand wheel PS ground, TTL handwh. ground
36 M VO Hand wheel PS ground, TTL handwh. ground
37 MPG0_B I input 1st Input handwheel, track B
1) VI/VO Voltage Input/Voltage Output
VI Voltage Input
VO Voltage Input
I Input
O Output
Ext. power supply
+24V stabilized
+24V 0V
Optocoupler
MCI board
extension
X121
Pin number:
5...8
M
24...27
Power supply of the digital inputs
Optocoupler
Driver
20,21
M
3,4,22,23
1,2
Relays
Ext. power supply
+24V stabilized
+24V 0V
MCI board
extension
X121
Pin number:
Power supply of the digital outputs
S The maximum cable length is 25m for all functions.
2 Hardware Descri
p
tions