Siemens SINUMERIK 828D PPU Series, Руководство пользователя

Страница: 201 / 244

Table 7-93 Technical specifications in the "voltage input" operating mode
Parameter Value
Input range (rated value) - 10 V to + 10 V
permitted overrange - 11.75 V to + 11.75 V
Resolution 16 bits (including sign)
Accuracy +/- 0.5%
Internal resistance Ri 100 KOhm
Table 7-94 Technical specifications in the "current input" operating mode
Parameter Value
Input range (rated value) - 20 mA to + 20 mA
Permitted overrange - 23.5 mA to + 23.5 mA
Resolution 16 bits (including sign)
Accuracy +/- 0.5%
Internal resistance Ri 133 ohm
Table 7-95 Technical data in the "PT100" operating mode
Parameter Value
Input range (rated value) - 200 ℃ to + 259 ℃
Standard EN60751
Resolution 16 bits (including sign)
Accuracy +/- 2 ℃
Internal resistance Ri >> 10 kOhm
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.
Connectable components
7.7 PP 72/48D 2/2A PN
PPU
Manual, 01/2014, 6FC5397-2DP40-3BA3
201