Siemens SINUMERIK 840D sl Function Manual page 611

I/O device interface X121
The interface connection for a probe is made via the
● I/O device interface
37-pin D-sub plug connector (X121), a maximum of 2 probes can be connected;
The 24 V load power supply is also connected by means of this connector.
Table 8- 3
X121
The interfaces with pin assignment are displayed and described in detail:
References:
/PHC/ CCU Configuration Manual
Extended Functions
Function Manual, 09/2009, 6FC5397-1BP20-0BA0
Extract from PIN assignment table for X121 front connectors
PIN
1 M24EXT
2 M24EXT
... ...
9 MEPUS 0
10 MEPUC 0
... ...
20 P24EXT
21 P24EXT
... ...
28 MEPUS 1
29 MEPUC 1
... ...
8.2 Hardware requirements
Name
External power supply
External ground
External ground
...
Probe connection 1
Measuring pulse signal input
Measuring pulse common input
...
External power supply
P 24 V external
P 24 V external
...
Probe connection 2
Measuring pulse signal input
Measuring pulse common input
...
M5: Measuring
611