Siemens SINUMERIK 828D PPU Series Manual page 201

Table 7-93
Parameter
Input range (rated value)
permitted overrange
Resolution
Accuracy
Internal resistance Ri
Table 7-94
Parameter
Input range (rated value)
Permitted overrange
Resolution
Accuracy
Internal resistance Ri
Table 7-95
Parameter
Input range (rated value)
Standard
Resolution
Accuracy
Internal resistance Ri
NOTICE
Protection from overvoltage
If the PT100 operating mode is selected, the hardware is protected against overvoltage. The
following mechanisms are triggered in the event of an error:
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.
Measurements with 4-wire connections compensate for line resistances and return a
considerably higher degree of precision in comparison with 2-wire connections.
PPU
Manual, 01/2014, 6FC5397-2DP40-3BA3
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
7.7 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
201