Advertisement
ANALOG IN 15 BIT VOLTAGE/CURRENT 8CH IC220ALG221
Analog Input Stages (Continued)
Current Inputs
Input resistance
Limit frequency (-3 dB) of the input filter
Behavior upon sensor failure
Maximum permissible voltage between analog
current inputs and an analog reference poten-
tial or between two current inputs
Maximum permissible current in every input
Safety Measures
Surge voltage and overcurrents
Electrical Isolation/Isolation of Voltage Ranges
To provide electrical isolation of the logic level and the I/O area, it is necessary to supply
the bus terminal and the sensors, which are connected to the described analog input ter-
minal, from separate power supplies. Interconnection of the 24 V power supplies is not
permitted.
Common Potentials
The 24 V main power supply, 24 V segment voltage, and GND have the same potential. FE is a se-
parate potential area.
Separate Potentials in the System Consisting of Bus Terminal/Power Terminal and an I/O
Terminal
- Test Distance
5 V supply incoming remote bus/7.5 V supply (bus logic)
5 V supply outgoing remote bus/7.5 V supply (bus logic)
7.5 V supply (bus logic)/24 V supply U
7.5 V supply (bus logic)/24 V supply U
I/Os/functional earth ground
Error Messages to the Higher-Level Control or Computer System
Failure of the voltage supply U
I/O error/user error
44
25 Ω (shunt)
3.5 kHz
Goes to 0 mA/4 mA
±2.5 V (corresponds with 100 mA via the shunts)
±100 mA
100% overload, maximum
/I/O
ANA
/functional earth ground
ANA
Yes
ANA
Yes, error message via the process data input
words (see page 29)
- Test Voltage
500 V AC, 50 Hz, 1 min
500 V AC, 50 Hz, 1 min
500 V AC, 50 Hz, 1 min
500 V AC, 50 Hz, 1 min
500 V AC, 50 Hz, 1 min
6226B_GE
Advertisement
