Siemens NCU 7x0.3 PN Series Manual page 133

Table 9- 48
Parameter
Input range (rated value)
permitted overrange
Resolution
Accuracy
Internal resistance Ri
Table 9- 49
Parameter
Input range (rated value)
Permitted overrange
Resolution
Accuracy
Internal resistance Ri
Table 9- 50
Parameter
Input range (rated value)
Standard
Resolution
Accuracy
Internal resistance Ri
CAUTION
If the PT100 operating mode is selected, the hardware is protected against overvoltage.
In the event of an error the following occurs:
1. An error bit is set which is then communicated to the PLC.
2. The module is shut down.
Measurement using a 4-wire connection system
Notes regarding the connection and operation of PT100 resistors:
This enables the module to supply X3 with a constant current via the CO1, CI1, CO2 and CI2
terminals. The constant current is fed to the resistor to be measured where it is then
measured as the voltage drop. It is imperative to wire the connected constant current cables
directly to the resistor.
NCU 7x0.3 PN
Manual, 09/2011, 6FC5397-1EP40-0BA0
Technical specifications in the "voltage input" operating mode
Technical specifications in the "current input" operating mode
Technical data in the "PT100" operating mode
Connectable components
9.3 PP 72/48D 2/2A PN
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
16 bits (including sign)
+/- 0,5 %
133 ohm
Value
- 200 ℃ to + 259 ℃
EN60751
16 bits (including sign)
+/- 2 ℃
>> 10 kOhm
133