1.4 Connection
1 I/O bus
2 Allocation between terminal number and signal name
3 8 yellow LEDs to display the signal states C0 - C7
4 1 green LED to display the state of the process supply voltage UP
5 1 red LED to display errors
6 Label
7 Terminal unit TU515/TU516
All I/O channels (digital and analog) are protected against reverse polarity,
reverse supply and continuous overvoltage up to 30 VDC.
2019/11/153ADR024117M02xx, 11, en_US12
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