Navigator 500
Sodium analyzer
7 Menu descriptions
OI/ASO550–EN Rev. G
53
…Menu
Comment
Default
Digital I/O
See page 18 for digital I/O connections.
Digital I/O 1 to 6
Sets the polarity of the input or output signal
Type
Sets the
Digital I/O
to operate as an output or an input:
Off
– no action taken.
Output
– the
Digital I/O
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).
Off
Source
Selects the digital signal to be assigned to the output –
see Table 7.2, page 58.
None
Polarity
Sets the polarity of the output signal.
Inverted
– for an output, if the source is active the output is low. For an
input, if a high signal is detected the input is inactive.
Non Inverted
– for an output, if source is active the output is high. For
an input, if a low signal is detected the input is inactive.
Non Inverted
Relays
Relay 1 to 6
Relays 5
and
6
are available only if an option board is fitted – see
page 18.
Source
Selects the digital signal to be assigned to the relay –
see Table 7.3, page 58.
None
Polarity
Sets the polarity of the relay:
Inverted
– if the source is active the relay is energized.
Non Inverted
– if the source is inactive the relay is energized.
Non Inverted