iRIS 350FX Reference Manual V1.50
12
HyQuest Solutions (NZ) Ltd
- PO Box 9466, Hamilton, New Zealand Tel: +64 7 857-0810 Email: [email protected]
Figure 3 - Simplified Analogue Input Circuit
Figure 4 - Analogue Input / Output Links
It is possible to use an external resistor such as a 250
Ω
to raise the voltage range measured.
I.e. 100
Ω will give a working range of 0.4V to 2V, 250Ω will give a range of 1V to 5V.
In this case, ensure the internal sink enable link is open. The resistor value in the analogue scaling
calculator in iLink will need to be changed to the value actually used.
Analogue Output
The iRIS has a single variable analogue output. This may be configured to deliver either a voltage output
ranging between 0-5V or a current output ranging from 4-20mA. The output's electrical signal (voltage or
current) is link selectable.
See Section
for details on configuring the analogue output.
Digital I/O
The iRIS has four digital I/O channels which can each be configured as either an input or output. When set as
an output, the channel can either supply switched 12V or else act as a pull-down switch for loads with a
different supply voltage. If the digital output configuration is set to 0 (Disabled) the channel is by default an
input. See Section
for details on configuring the digital outputs.
1nF
22K
75K
AGND
AINx
To ADC
AIN4 100Ω current
sink enable link (J1)
AIN1 100Ω current
sink enable link (J4)
AIN3 100Ω current
sink enable link (J2)
AIN2 100Ω current
sink enable link (J3)
AOUT mode link. (J5)
4-20mA
0-5V (default)
Summary of Contents for iRIS 350FX
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