Siemens SINUMERIK ONE NCU 1740 Equipment Manual page 144

Connectable components
12.3 PP 72/48D PN 2/2A PN
X3 pin assignment
Table 12-47
Pin
1
2
3
4
5
6
7
8
9
10
11
12
The analog signal to be measured is connected to the terminals AI 1+/- and AI 2+/-. AI stands for "Analog
Input". The CO "Current Output" and CI "Current Input" terminals supply the constant current for the 4-wire
measurement of PT100 elements.
Analog inputs
The module has two analog inputs. These can optionally be assigned parameters as voltage,
current or PT100 input.
Note
The analog inputs are only enabled following the parameter assignment.
Cycle time of the analog value accumulation: 20 ms per channel
Table 12-48
Parameter
Input range (rated value)
permitted overrange
Resolution
Accuracy
Internal resistance Ri
Table 12-49
Parameter
Input range (rated value)
Permitted overrange
144
Pin assignment (standard)
Signal name Signal type
CO1 O
CI1 I
AI1+ I
AI1- I
CO2 O
CI2 I
AI2+ I
AI2- I
AO3+ O
AO3- O
AO4+ O
AO4- O
Technical specifications in the "voltage input" operating mode
Technical specifications in the "current input" operating mode
Meaning
Channel 1 current output for PT100
Channel 1 current input for PT100
Channel 1 analog input +
Channel 1 analog input -
Channel 2 current output for PT10
Channel 2 current input for PT100
Channel 2 analog input +
Channel 2 analog input -
Channel 3 current and voltage output +
Channel 3 current and voltage output -
Channel 4 current and voltage output +
Channel 4 current and voltage output -
Value
- 10 V to + 10 V
- 11.75 V to + 11.75 V
16 bits (including sign)
+/- 0,5 %
100 KOhm
Value
- 20 mA to + 20 mA
- 23.5 mA to + 23.5 mA
Equipment Manual, 10/2021, A5E51087503B AA
NCU 1740