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expense resulting from errors or omissions. In the interest of technical improvement, this specification may be altered without notice.
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IO-AUD
Issue: 5.2
Date Of Issue: 28/10/2008
© 2008 Sontay Limited. All rights reserved.
Power Supply (continued) Configuration (continued)
It is highly suggested that the 24Vac neutral of all trans-
formers be earth grounded at the transformer. Analogue
input, digital input, and analogue output circuits should not
be earth grounded at two points. Any field device connected
to this transformer must use the same common. If you are
not sure of other field device configuration, use separate
transformers.
Configuration
Setting output rate of change:
Select the rate of change by setting the DIP switch as
shown in Fig A. The rate of change is the time it takes for
the analog output to go from minimum to maximum. Rate of
change selections are as follows:
45, 60, 120, and 240 seconds
Changing the timing range with power on will result in reset
to minimum.
Setting output signal type:
Select either current or voltage output with the two
switches.
NEVER have both switches on or off at the same time while
powered, or the IO-AUD may be damaged.
Setting output offset and range:
The minimum output signal will be equal to the offset. The
maximum output signal will be equal to the offset plus the
span.
Select offset of 1 volt / 4mA or adjustable offset by switch 6
as shown in Fig C.
To use adjustable offset setting, set DIP switch 6, and set
Offset Pot by turning counter clockwise to decrease and
clockwise to increase offset.
Select the desired span by setting the three switches as
shown in Fig D.
To use adjustable span setting, set Span Pot by turning
counter clockwise to increase and clockwise to decrease
span.
Manual Override:
The output can be set manually using J2 for testing or set-
ting up adjustable offset and span. When setting offset, set
output to minimum by adjusting override potentiometer fully
counter clockwise Do this first if you are going to adjust the
pan as well. When setting span, set output to maximum by
adjusting override potentiometer fully clockwise.
Be sure to return Jumper J2 to AUTO position after testing.
NB: If powered when making DIP switch settings, power
must be reset to allow DIP switch settings to be recognized.
After all connections have been made, activate the power
source. The “POWER” LED should light. The “UP” and
“DOWN” LED’s will light when the AUD is receiving input
signals.
