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
Function
Type
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 Descriptions