IB IL 24 EDO 2 (-PAC)
6528B 11
Electrical Isolation/Isolation of the Voltage Areas
To provide electrical isolation between the logic level and the I/O area, it is necessary to
supply the station bus terminal and the digital output terminal described here using the
bus terminal or a power terminal from separate power supply units. Interconnection of the
24 V power supplies is not permitted.
Common Potentials
The 24 V main voltage supply, 24 V segment voltage, and GND have the same potential.
FE is a separate potential area.
Separate Potentials in the System Consisting of Bus Terminal/Power Terminal and I/O
Terminal
- Test Distance - Test Voltage
5 V supply incoming remote bus/7.5 V supply (bus logic) 500 V AC, 50 Hz, 1 min
5 V supply outgoing remote bus/7.5 V supply (bus logic) 500 V AC, 50 Hz, 1 min
7.5 V supply (bus logic)/24 V supply (I/O) 500 V AC, 50 Hz, 1 min
24 V supply (I/O)/functional earth ground 500 V AC, 50 Hz, 1 min
Error Messages to the Higher-Level Control or Computer System
Short circuit/overload of an output Yes
An error message is generated when an output is shorted and switched on. In addition a
status bit is set in the input process data (see Page 5) and on the terminal block the
diagnose LED (D) flashes at 2 Hz (medium).
Open circuit Yes;
In addition a status bit is set in the input process
data (see Page 5) and on the terminal block the
diagnose LED (D) flashes at 2 Hz (medium).
Operating voltage out of range No
