ABB ControlMaster CM10 User Manual page 51

ControlMaster CM10, 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
IM/CM/S–EN Rev. R
1 1 1
/ , / and / DIN
8 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 < 5 V, high > 11 V (maximum input 30 V).
Digital input low < 0.8 V, high > 2 V.
Selects the digital signal to be assigned to the output – see Appendix A.1, page 116 for
description of sources.
Sets the polarity of the output signal.
For an output, the output is high if the source is active.
For an input, the input is active if a high signal is detected.
For an output the output is high if the source is inactive.
For an input, the input is active if a low signal is detected.
7 Advanced Level
49