Siemens SINUMERIK 840D sl Manual page 29

Optional customer keys X53/X54
The outputs X53 / X54 are intended to activate lamps in the keys.
We would recommend using 1.2 W lamps with max. 0.3 A per output.
High-side switches which switch 24 V to the lamps and limit the current during short circuits
are used as output drivers.
Figure 4-7
NOTICE
Damage to the module through induction voltages
Do not connect any relays, valves or other inductive loads.
Interface:
Connector designation:
Connector type:
Table 4-11
Pin
1
2
3
4
ERGOline Stage 3
Manual, 02/2015, 6FC5397-4FP40-0BA0
Schematic circuit diagram of the output circuit for X53 and X54
Optional customer keys OUT
X53/X54
4-pin male connector
Assignment of connector X53
Name
KT-OUT1
KT-OUT2
KT-OUT3
M
Type Meaning
Customer key 1 lamp
O
Customer key 2 lamp
Customer key 3 lamp
V Ground
Interfaces
4.3 Machine control panels
29