Siemens SINUMERIK 840D sl Equipment Manual page 97

For details on the connection options, see Table 7-28 Connectable conductor cross-sections
(Page 79).
Table 9-8 Pin assignment for X122
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Signal type: B = Bidirectional; I = Input; GND = Reference potential (ground)
DI: Digital input; DI/DO: Bidirectional digital input/output; M: Ground M1: Ground reference
Please take the technical data of the digital inputs/outputs from Chapter Technical data
(Page 80).
NOTICE
Ensuring the function of the digital inputs
An open input is interpreted as "low".
The "rapid inputs" can be used for position detection and as inputs of measuring inputs
depending on the terminal assignment used.
To enable digital inputs 0 to 3 to function, terminal M1 must be connected. This can be done
as follows:
• Connect the ground reference of the digital inputs.
• A jumper to terminal M (note that these digital inputs are then no longer electrically
Note
For a transient (brief) voltage interruption of the 24 V supply, the digital outputs are switched
inactive for this time.
NCU 7x0.3B PN
Equipment Manual, 10/2020, 6FC5397-1EP40-6BA1
Signal name Signal type
DI 0 I
DI 1 I
DI 2 I
DI 3 I
DI 16 I
DI 17 I
G1 GND
M GND
DI/DO 8 B
DI/DO 9 B
M GND
DI/DO 10 B
DI/DO 11 B
M GND
isolated).
Meaning
Digital input 0
Digital input 1
Digital input 2
Digital input 3
Digital input 16
Digital input 17
Ground for DI0 - DI3, DI16, DI17 (isolated with respect to M)
Ground
Digital input/output 8 (rapid input)
Digital input/output 9 (rapid input)
Ground
Digital input/output 10 (rapid input)
Digital input/output 11 (rapid input)
Ground
Connectable components
9.1 NX10.3 / NX15.3
97