ControlMaster CM10, CM30 and CM50
Universal process controllers,
1
/8,
1
/4 and
1
/2 DIN 7 Advanced Level
IM/CM/S–EN Rev. R 49
…Input/Output
Digital I/O
Digital IO 1 (6)
Ty p e Sets the Digital IO to operate as an output or an input.
Off
No action taken.
Output
The Digital IO operates as an output.
Volt Free
High input detected when volt-free switch across input is closed.
24 Volt
Digital input low < 5 V, high > 11 V (maximum input 30 V).
TTL
Digital input low < 0.8 V, high > 2 V.
Output Source Selects the digital signal to be assigned to the output – see Appendix A.1, page 116 for
description of sources.
Polarity Sets the polarity of the output signal.
Positive
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.
Negative
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.
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