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iRIS 220 / iRIS 320, V1.19 User Guide - 56
56
iQuest (NZ) Ltd - PO Box 15169, Hamilton, New Zealand Tel: +64 7 857-0810 Fax: +64 7 857-0811 Email: iquest@iquest.co.nz
- +
External
12V Battery
(Optional)
DN
Up/Down
UP
Water Level
+12V
Sensor
0V
AI4
AI3
AI2
AI1
AGND
5VOP
DI2
DI1
DO2
DO1
SDI-12
DGND
12V+
GND (-)
VIN+
GND (-)
6.4 Connecting an Up/Down Water Level Instrument
A relatively common type of digital water level instrument is one that provides two pulse outputs. One output
generates a pulse for each increment and the other for each decrement in level. The iRIS maintains a record
of these steps and therefore the relative level.
These instruments normally require a 12V supply and this is readily obtained from the iRIS. A
supplementary 12V battery can be connected if desired. Typically, this type of instrument requires very little
current, so the internal iRIS 320 battery will normally suffice.
The diagram below shows the required connects for such an installation. The incrementing output must be
connected to DI1 and the decrementing output to DI2.
TOP
BOTTOM
iRIS I/O Connector
Charging source
e.g solar panel