ABB CM30 User Manual page 37

ControlMaster CM30 and CM50
Universal process controllers,
...Input/Output
Digital I/O
Digital IO 1 (6)
Type
Off
Output
Volt Free
24 Volt
TTL
Output Source
Polarity
Positive
Negative
Relays
Relay 1 (4)
Source
Polarity
Positive
Negative
IM/CM/ED–EN Rev. B
1 1
/ and / DIN
4 2
Sets the Digital IO to operate as an output or an input.
No action taken.
The Digital IO operates as an output.
High input detected when volt free switch across input is closed.
Digital input low <5V, high> 11 V (maximum input 30 V).
Digital input low <0.8V, high> 2 V.
Selects the digital signal to be assigned to the output – see Appendix A, page 79 for
description of sources.
Sets the polarity of the output signal.
For an output, if the source is active the output is high.
For an input, if a high signal is detected the input is active.
For an output, if source is inactive the output is high.
For an input, if a low signal is detected the input is active.
Selects the digital signal to be assigned to the relay – see Appendix A, page 79 for
description of sources.
Sets the polarity of the relay.
If the source is active the relay is energized.
If the source is inactive the relay is energized.
7 Advanced Level
35