Siemens SINUMERIK 828D Manual page 82

Interface description
6.5 Digital inputs/outputs
Connection notes
1. Recommended connection:
2. Not recommended connection:
X242 pin assignment
Pin
1
2
3
4
5
6
7
8
9
10
82
If both inputs and outputs are operated on a digital inputs/outputs group, it is
recommended that both the inputs and the outputs are fed with the same 24 VDC supply:
Figure 6-2 Inputs and outputs on the same supply
If the inputs and outputs supplied separately with power, the input current can exceed the
permissible value of 15 mA according to EN61131-2. This may possibly cause the signal
source to be overloaded:
Figure 6-3 Inputs and outputs on different supplies
Signal name
Not connected
Not connected
IN1 DIN1
IN2 DIN2
IN3 DIN3
IN4 DIN4
M4 MEXT4
P3 P24EXT3
O1 DOUT1
O2 DOUT2
NC variable Meaning
$A_IN[1] Digital NCK input 1
$A_IN[2] Digital NCK input 2
$A_IN[3] Digital NCK input 3
$A_IN[4] Digital NCK input 4
Ground for pins 3...6
+24 V power supply
$A_OUT[1] Digital NCK output 1
$A_OUT[2] Digital NCK output 2
Manual, 03/2013, 6FC5397-2DP40-3BA1
PPU