HyQuest Solutions iRIS 270 User manual
iRIS 270
User Manual
© 2022 HyQuest Solutions 2
Table of Contents
I Disclaimer 5
II Safety Instructions 6
Part I Introduction 7
1.1 About this Manual ............................................................................................................................................ 8
1.2 Key Features ..................................................................................................................................................... 8
1.2.1 Telemetry and SDI-12 Diagnostics ...................................................................................................... 8
1.2.2 Power Management .................................................................................................................................. 8
1.2.3 Data Logging ............................................................................................................................................... 9
1.2.4 Logged Data Array Identification ........................................................................................................ 9
1.2.5 Alarm Processing ....................................................................................................................................... 9
1.2.6 Real Time Clock & Calendar ................................................................................................................. 10
1.2.7 Security ...................................................................................................................................................... 10
Part II Installation 11
2.1 Mounting .......................................................................................................................................................... 11
2.2 Opening/Closing the Housing .................................................................................................................... 11
2.3 I/O Connector .................................................................................................................................................. 12
2.3.1 External (Charger) Power Supply ....................................................................................................... 13
2.3.2 Analogue I/O ............................................................................................................................................. 14
2.3.3 Digital I/O .................................................................................................................................................. 16
2.3.4 Serial Sensor Interface (SSI) ................................................................................................................ 19
2.4 Telemetry Module ......................................................................................................................................... 20
2.4.1 Cellular ........................................................................................................................................................ 20
2.4.2 Serial ........................................................................................................................................................... 22
2.4.3 WIP Ethernet ............................................................................................................................................ 24
2.5 Telemetry Module Connectors/Interface ............................................................................................... 26
2.5.1 Two Coaxial + One Gland ...................................................................................................................... 26
2.5.2 Two Glands ................................................................................................................................................ 28
2.6 Cellular Modem Type Identification ........................................................................................................ 29
Part III Configuration 30
3.1 Connecting to the iRIS 270 with iLink Desktop software via Wi-Fi (Windows 10) ............... 30
3.2 Turn off Wi-Fi Access Point ....................................................................................................................... 31
3.3 Changing the Wi-Fi password with iLink Desktop software via Wi-Fi (Windows 10) ........... 32
3.4 Configuration Menus .................................................................................................................................... 33
3.4.1 System ........................................................................................................................................................ 34
3.4.2 Power .......................................................................................................................................................... 35
3.4.3 I/O Configuration .................................................................................................................................... 35
3.4.4 Comms ........................................................................................................................................................ 39
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3.4.5 SDI-12 Devices ........................................................................................................................................ 50
3.4.6 Modbus Devices ...................................................................................................................................... 54
3.4.7 Sensor Configuration ............................................................................................................................. 55
3.4.8 Alarm Configuration ............................................................................................................................... 60
3.4.9 SMS Numbers ........................................................................................................................................... 62
3.5 SDI-12 Command Mode .............................................................................................................................. 62
3.5.1 Accessing ................................................................................................................................................... 62
3.5.2 Sending user command to device ...................................................................................................... 63
3.5.3 Address Change function ...................................................................................................................... 63
3.5.4 Address Scan ............................................................................................................................................ 64
3.6 Using iLink’s Sensor Configuration Tool ................................................................................................ 64
3.6.1 iRIS Sensor Configuration Example ................................................................................................... 64
3.7 Modbus Protocol ............................................................................................................................................ 68
3.7.1 Protocol Overview .................................................................................................................................. 68
3.7.2 Example of iRIS acting as a Master .................................................................................................. 76
3.7.3 Example of iRIS acting as a Slave Sensor ....................................................................................... 79
3.7.4 Example of iRIS acting as a protocol gateway (Modbus Slave) ............................................... 82
3.8 Upgrading Firmware .................................................................................................................................... 85
3.8.1 iRIS Executive Firmware File Naming Conventions .................................................................... 85
3.8.2 Active verse Pending Firmware ......................................................................................................... 86
3.8.3 iRIS Automated Upgrade Procedure (Firmware) .......................................................................... 86
3.8.4 iRIS Manual Upgrade Procedure (Firmware) .................................................................................. 87
Part IV Operation 88
4.1 General Hints .................................................................................................................................................. 88
4.2 LED Indicators ................................................................................................................................................ 88
4.2.1 Status LED ................................................................................................................................................. 88
4.2.2 Front panel Diagnostic LEDs ............................................................................................................... 88
4.3 LCD & Keypad ................................................................................................................................................. 89
4.3.1 LCD Operation .......................................................................................................................................... 89
4.3.2 Status Icons .............................................................................................................................................. 90
4.3.3 Display Menu Structure ........................................................................................................................ 90
4.3.4 Keypad Buttons ....................................................................................................................................... 93
4.3.5 Primary LCD Display Screens ............................................................................................................. 93
4.3.6 Sensor Selection Sub menu (Level 3) ............................................................................................... 97
4.3.7 Sensor Related Screens ......................................................................................................................... 97
4.3.8 Totaliser Related Screens .................................................................................................................. 100
4.3.9 Comms Related Screens ..................................................................................................................... 100
4.4 Solar Regulator ............................................................................................................................................ 104
4.4.1 Charging Batteries cycles .................................................................................................................. 104
4.4.2 Charging Process .................................................................................................................................. 105
4.4.3 Charger LED Flash States .................................................................................................................. 106
4.5 SMS Communication .................................................................................................................................. 107
© 2022 HyQuest Solutions 4
4.5.1 SMS Text Commands ........................................................................................................................... 107
4.6 File Transfer Protocol (FTP) Operation ................................................................................................ 113
4.6.1 File Name Convention ......................................................................................................................... 113
4.6.2 CSV File Formats .................................................................................................................................. 113
4.6.3 ZRXP File Formats ............................................................................................................................... 114
4.7 Logging Auxiliary sensor information ................................................................................................. 118
4.7.1 Minimum ................................................................................................................................................. 118
4.7.2 Maximum ................................................................................................................................................ 119
4.7.3 Standard Deviation .............................................................................................................................. 120
4.7.4 Calculated Flow Rate or Total ........................................................................................................... 120
4.7.5 Check Count ............................................................................................................................................ 120
4.8 Real-time Diagnostics ............................................................................................................................... 121
4.9 Analogue Input Scaling .............................................................................................................................. 123
4.9.1 Example: A 4-20mA Water Level Sensor ..................................................................................... 123
Part V Repair 125
Part VI Technical Data 126
Part VII Obligations of the Operator and Disposal 127
7.1 Obligations of the Operator .................................................................................................................... 127
7.2 Dismantling / Disposal .............................................................................................................................. 127
Part VIII Appendices 129
8.1 SDI-12 ............................................................................................................................................................ 129
8.1.1 What is SDI-12? ................................................................................................................................... 129
8.1.2 Advantages of SDI-12 ........................................................................................................................ 129
8.1.3 SDI-12 Electrical Interface ................................................................................................................ 129
8.2 FTP Terminology ......................................................................................................................................... 131
8.2.1 Active verses Passive mode ............................................................................................................. 131
8.3 Declaration of Conformity ....................................................................................................................... 135
Copyright Notice: No parts of this work may be
reproduced in any form or by any means without the
written permission of the publisher. HyQuest
Solutions waives copyright for users to print out
parts of the documentation in hard copy for their
own use only.
Trademark Notice: HyQuest Solutions (HS) and
KISTERS products and services referred to in this
document are trademarks or registered trademarks
of HyQuest Solutions or KISTERS AG. Other product
names used may or may not be the trademarks of
their respective owners.
© 2020 HyQuest Solutions, a KISTERS Group
Company. Any rights not expressly granted herein
are reserved.
The information provided in this manual was deemed
accurate as of the publication date. However, updates
to this information may have occurred.
This manual does not include all of the details of
design, production, or variation of the equipment
nor does it cover every possible situation which may
arise during installation, operation or maintenance.
HyQuest Solutions shall not be liable for any
incidental, indirect, special or consequential damages
whatsoever arising out of or related to this
documentation and the information contained in it,
even if HyQuest Solutions has been advised of the
possibility of such damages.
Any errors found in any HyQuest Solutions product
should be reported to HyQuest Solutions where
every effort will be made to quickly resolve the
problem.
This document is public.
5© 2022 HyQuest Solutions
I Disclaimer
§
Read the user manual including all operating instructions prior to installing, connecting and powering up the HyQuest
Solutions iRIS 270. The manual provides information on how to operate the product. The manual is intended to be
used by qualified personnel, i.e. personnel that have been adequately trained, are sufficiently familiar with
installation, mounting, wiring, powering up and operation of the product.
§
Keep the user manual on hand for later reference!
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If you encounter problems understanding the information in the manual (or part thereof), please consult the
manufacturer or its appointed reseller for further support.
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HyQuest Solutions iRIS 270 is intended to be used in hydrometeorological or environmental monitoring applications.
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Before starting to work, you have to check the functioning and integrity of the system.
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Check for visible defects on the iRIS 270, this may or may not include any or all of the following mounting facilities,
connectors and connections, mechanical parts, internal or external communication devices, power supplies or
power supply lines, etc.
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If defects are found that jeopardize the operational safety, work must be stopped. This is true for defects found
before starting to work as well as for defects found while working.
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Do not use the HyQuest Solutions iRIS 270 in areas where there is a danger of explosion.
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The present user manual specifies environmental/climatic operating conditions as well as mechanical and electrical
conditions. Installation, wiring, powering up and operating the HyQuest Solutions iRIS 270 must strictly comply with
these specifications.
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Perform maintenance only when tools or machinery are not in operation.
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If guards are removed to perform maintenance, replace them immediately after servicing.
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Never make any electrical or mechanical diagnostics, inspections or repairs under any circumstances. Return the
sensor to the manufacturer’s named repair centre. You can find information on how to return items for repair in the
relevant section of the HyQuest Solutions web site.
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Disposal instructions: After taking the HyQuest Solutions iRIS 270 out of service, it must be disposed of in
compliance with local waste and environmental regulations. The HyQuest Solutions iRIS 270 is never to be disposed in
household waste!
§
Inputs and outputs of the device are protected against electric discharges and surges (so-called ESD). Do not
touch any part of the electronic components! If you need to touch any part, please discharge yourself, i.e. by touching
grounded metal parts.
II Safety Instructions
© 2022 HyQuest Solutions 6
© 2022 HyQuest Solutions 7
Introduction
1Introduction
Thank you for choosing our product. We hope you will enjoy using the device.
HyQuest Solutions manufactures, sells, installs and operates quality instrumentation, data loggers and communication
technology. Products are designed with passion for environmental monitoring and with a deep understanding of the
quality, accuracy and robustness needed to fulfil the requirements of measurement practitioners in the field.
The present User Manual will help you understand, install and deploy the device. If, however, you feel that a particular
information is missing, incomplete or confusing, please do not hesitate to contact us for further support!
The iRIS 270 is the perfect marriage of the proven iRIS design legacy with a future-proof architecture. It is compact, cost
effective, ruggedized, IP-capable and easily configured - and due to its dual telemetry slots the iRIS 270 extends the
telemetry options and the range of pluggable devices.
General Characteristics
The iRIS 270 is supplied in an environmentally sealed (IP67) enclosure constructed from a special corrosion-resistant
aluminium alloy that is finished in a hard-anodised coating. This provides a very high degree of mechanical strength and
EMI shielding, and enables completely stand-alone mounting in outdoor situations.
The iRIS 270 supports a maximum of fifty external sensors (1-50). Sources for these sensors may be chosen from physical
digital or analogue inputs or virtual sources (via serial communication or calculations).
Sources may also be from internal measurements (battery voltage, supply voltage, temperature and RSSI). Each sensor
has six associated alarms, each with separate trigger and reset levels. Each alarm also has a duration, which is used to
delay the alarm trigger for analogue inputs and to determine the time over which pulse input counters should be
totalised (rainfall etc.).
Data from all enabled sensors are logged format which includes full date and time stamp to a 1 second resolution. The iRIS
270 supports SDI-12 communication with a range of industry standard intelligent sensors.
Figure 1 – iRIS 270 External View
© 2022 HyQuest Solutions 8
Introduction
Typical Applications
The iRIS can be used for a wide range of diverse applications, including but not limited to:
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Rainfall measurement
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River level monitoring
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Water / power / gas metering
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Remote control
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Wind measurement
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Mobile temperature monitoring
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Irrigation monitoring / control
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For more information, see the following subsections:
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About this Manual
§
Key Features
1.1 About this Manual
This manual is intended as a detailed guide for iRIS 270 installation, configuration and operation.
This manual is also available online in Adobe Acrobat® pdf format for download at www.hyquestsolutions.com.
Throughout this document, small icons are used to identify additional information. These are as follows:
Note Indicates extra detail to expand the current discussion.
Warning Describes something that may cause problems if not heeded.
Note: The term “iRIS” is used throughout this manual in all references to the iRIS 270.
1.2 Key Features
This chapter contains the following subsections:
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Telemetry and SDI-12 Diagnostics
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Power Management
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Data Logging
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Logged Data Array Identification
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Alarm Processing
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Real Time Clock & Calendar
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Security
1.2.1 Telemetry and SDI-12 Diagnostics
Monitoring operation of the communications modules and SDI-12 bus is possible from the iLink software. The
Architecture allow for remote monitoring, monitoring over open channels (Radio) even monitoring of the operation of
the channel being used. The information obtained is time stamped real time log with three levels (information,
warning/error), which this can be filtered and captured for later analysis.
1.2.2 Power Management
The iRIS supports power management in two main ways. These can be used to save power for sites that have a small
power budget:
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LED and LCD activity – The status LED and LCD backlight can be set to turn off after a user defined timeout.
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Checking SMS on Cellular module – the checking for incoming SMS can be disabled to save power.
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Introduction
1.2.3 Data Logging
The iRIS supports the logging of data from up to fifty virtual sensors. Each of the virtual sensors can obtain information
from one of the following data sources:
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Analogue input on AIN1 – AIN2
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Pulse counter attached to DI1, DI2 or DIO
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Simulated pulse counter enabled by DI1, DI2 or DIO
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Frequency counter attached to DI1, DI2 or DIO
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Up/down counter attached to DI1, DI2 or DIO simultaneously
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SDI-12 instrument channel
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Change of status on charger input (dc supply)
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Battery voltage
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Supply (charger) voltage
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Logger temperature
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Received Signal Strength Indication (RSSI)
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Change Of State on digital I/O channels DI1, DI2 or DIO
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Serial instrument (using the Modbus protocol)
Each sensor can be set up to scale the raw data source into engineering units through the application of a multiplier and
offset (slope and constant). The scaled value can be logged to non-volatile memory at rates between once per minute to
once per hour or immediately in true event mode for pulse inputs.
It is also possible to configure a sensor to also log associated values such as minimum, maximum, standard deviation (for
all source types) or a calculated flow rate or volume (pulse type sources only). See the next section for further details on
configuring these extended logging features as part of the Sensor Configuration menus.
1.2.4 Logged Data Array Identification
Each sensor’s logged data is identified by an array ID number. For the primary logged data, the ID is the sensor number
itself. For the optional supplementary data (min, max, deviation, flow/vol), the array ID has an offset added to the sensor
number that it is associated with. These ID offsets are as follows:
Minimum:
+50
Maximum:
+100
Deviation:
+150
Flow/Volume
+200
Check Count
+250
For example, Sensor 4 has been configured to log the average value, plus the maximum and standard deviation. Three
data arrays will be logged for this sensor at each logging interval with IDs of 4, 104 and 154 respectively. In HydroTel™ or
SODA these require point identifiers of 4, 104 and 154 respectively.
Array 0 (zero) is a special array identifier and is used as a system event log. Currently this is only used to log
a restart (either at the initial connection of power, on a watchdog reset or a user program start after an
upgrade). The logged value in this case contains a value that can be decoded to determine the cause of the
restart. In HydroTel the identifier for this item is 0.
1.2.5 Alarm Processing
There is a “pool” of up to 100 free-format alarms. These can be assigned to any virtual sensor. It therefore possible to
have two alarms on every sensor or else more on some sensors and less or none on others. Each alarm has separate
trigger and reset levels, an activation delay or accumulation period depending upon the data type, comms interval,
enable call-in and an option to send a customised SMS text to a specified number when the alarm is triggered.
© 2022 HyQuest Solutions 10
Introduction
Each sensor has an associated flag that is set if any alarm on the sensor is active. This can be used to vary the logging rate
for the sensor. For example, taking more frequent logs when water level is high compared to a less frequent “routine” log
in normal conditions.
The iRIS also maintains a global “alarms active” flag that is set if any alarm on any sensor in the device is active. This is
used to trigger a call-in or data transfer to the designated host. As well as the call-in, this flag can also control the digital
outputs.
1.2.6 Real Time Clock & Calendar
The iRIS has a non-volatile real time clock that can be read and/or synchronised using HydroTel™ or iLink 3.
1.2.7 Security
The iRIS can be configured with a PIN code to prevent unauthorised access to restricted information through the LCD and
keypad. This is especially useful when the iRIS is installed in a location where it is accessible to the general public.
© 2022 HyQuest Solutions 11
Installation
2Installation
This chapter contains the following subsections:
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Mounting
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Opening/Closing the Housing
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I/O Connector
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Telemetry Module
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Telemetry Module Connectors/Interface
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Cellular Modem Type Identification
2.1 Mounting
The iRIS can be mounted by installing suitable screws through the mounting pillars which are exposed when the lid is
opened. The recommended mounting screws are M5 machine screws or Twinfast® wood screws.
Figure 1 – Mounting Diagram
It is very important that the four screws retaining the lid are tightened firmly after installation to maintain the
IP67 rating of the enclosure.
2.2 Opening/Closing the Housing
The front of the iRIS enclosure is secured by four machine screws with Phillips® heads.
To Open: Undo all four screws. There is no need to remove them completely as they are retained in the lid. The front
cover should then be lifted away from the base until the hinges are extended. Then the lid should be able to be swung
open (to the right), to a maximum angle of 90°.
To Close: Gently swing the front cover closed, holding it straight while refitting the screws. Tighten screws securely to
maintain the IP67 rating of the enclosure.
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Installation
2.3 I/O Connector
All I/O and power supply terminations are via 5mm (0.2”) pitch screw terminals provided on a 12-way and 10- way
pluggable connector. The I/O connectors are positioned externally on each side of the iRIS enclosure to allow easy
unplugging of the iRIS. The function of each I/O termination is shown in the diagrams below.
Figure 2 – Right hand side I/O Connector
© 2022 HyQuest Solutions 13
Installation
Figure 3 – Left hand side I/O Connector
For more information, see the following subsections:
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External (Charger) Power Supply
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Analogue I/O
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Digital I/O
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Serial Sensor Interface (SSI)
2.3.1 External (Charger) Power Supply
The iRIS can operate solely from the external battery which is charged externally, or you can connect any external dc
power source ranging from 8 – 30Vdc, including a solar panel, without requiring an additional solar regulator.
The battery charging circuitry for sealed lead acid (SLA) batteries utilises a switch mode regulator, employing Maximum
Power Point Tracking (MPPT) for maximum efficiency. The external power supply is protected against over-voltage by
ultra-fast acting protection devices and a self-resetting semiconductor fuse.
See section Solar Regulator for more information on configuration of the internal solar regulator.
Warning A cable length of lesser than 3m is required on the VIN port.
Warning When using the charger feature of the iRIS an external battery needs to be attached. The input
supply must be connected to VIN and the battery connected to VBAT. When an external charger or DC source
is used this must be connected to VBAT and NOT VIN. In this case VIN should be left disconnected.
Failure to follow these instructions will cause the power to iRIS to drop out irregularly and it will reboot.
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Installation
2.3.2.1 Analogue Inputs
The two analogue inputs are unit-polar 0-100mVdc, 0-5Vdc or 0-30Vdc with 16-bit resolution. Each input presents a load
impedance of 123.74 kΩ to the input signal.
Scaling factors should be chosen to convert from a raw value of, e.g. 0.0000 – 5.0000, which reflects the input signal
range of 0-5V. When current sources such as 0-20mA or 4-20mA are connected, an internal sink resistor (100 Ω) is
enabled by an internal user-settable link. In this mode the measured voltage range is 0-2V for a 0-20mA input and the
scaling factor should take this into account.
As the analogue inputs have an input impedance of 123.74 kΩ, the actual sink resistor impedance will be
slightly lower than the value fitted. When, for example, the current mode link is fitted, a sink resistor of 100
ohms is installed. The actual impedance will theoretically be 99.92 Ω; therefore, the voltage measured by the
iRIS will also be slightly lower than expected.
Figure 5 – Simplified Analogue Input Circuit
Figure 6 – Analogue Input / Output Links
© 2022 HyQuest Solutions 16
Installation
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, 250 Ω 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. Also, a voltage measurement range for the analogue
input range needs chosen instead of current.
2.3.2.2 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 I/O Configuration for details on configuring the analogue output.
2.3.3 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 I/O Configuration
for details on configuring the digital outputs.
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Digital Channels as Inputs
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Digital Output
2.3.3.1 Digital Channels as Inputs
The digital inputs are selectable for either mechanical or electronic operation. In either case it is necessary to pull the input
down to 0Vdc to activate it. Inputs will handle up to 30Vdc in the off state for parallel connection across existing
equipment. The “debounce” is enabled by a jumper link, which if fitted enables a longer time constant circuit to eliminate
multiple pulses caused by contact bounce. The debounce jumpers are positioned in the centre of the PCB. The picture
below shows the links in their default positions.
Figure 7 – Digital Input Debounce Links
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Installation
Fit the jumper for mechanical switching at up to 20Hz. In this mode the input is normally pulled up to 12V through a 10
kΩ resistor providing a wetting current of approximately 1.2mA. A 100nF capacitor is also fitted across the input to
provide limited hardware debounce, preventing false triggering due to contact bounce.
Remove the appropriate jumper for electronic switching at up to 5kHz. In this mode the input is normally pulled up to 5V
through a 57 kΩ resistance, providing a wetting current of approximately 100mA. When DIO is used as an input the
debounce circuit is permanently connected to the input pin.
Figure 8 – Digital Input Circuit
Important note!
In almost all installations where an iRIS is connected in parallel with other equipment to share a common
pulse input (e.g. from a flow meter), there has not been a detrimental effect, as the iRIS inputs present a
relatively high impedance to the circuit. However, in the event that connecting an iRIS does cause pulse
failure, HyQuest Solutions recommend removing the debounce selection link for the appropriate input. This
sets the input to electronic switching mode, even if the actual pulse source is a clean contact (reed switch or
similar).
The debounce jumpers are located in the centre of the PCB and can be accessed once the front cover is
opened. See Figure Digital Input Debounce Links above.
Hint: When removing a jumper, simply fit it to only one pin of the connector to avoid it being lost.
2.3.3.2 Digital Output
When the iRIS digital I/O channel is configured as an output it can be operated electrically in one of two ways. Either:
Open-drain Pull-down which is capable of sinking up to 100mA at 30Vdc. An integral diode provides transient protection.
Typically, this output mode can be used to drive a relay or lamp powered by an auxiliary DC supply (e.g. 12V). In this
mode, the negative of the load supply must be connected to one of the iRIS GND terminals.
Although it may appear possible to directly control sensors by switching the sensor negative supply lead
using a digital output, this will introduce measurement errors and may possibly damage the sensor. Always
use a digital output configured as a switched 12V output to power sensors.
Or:
Switched 12V output which is capable of sourcing up to 100mA. Typically, this output mode will be used to drive a
sensor, relay or lamp powered by the iRIS’s 12V supply.
© 2022 HyQuest Solutions 18
Installation
Care should be taken to avoid the load discharging the internal and/or external 12V battery. Ensure
adequate power supply charging capacity is available to cater for the demands of both the iRIS and load.
The digital outputs may also be programmed to follow the state of the IP connection so that they will be active when a
wireless IP session has been established. This mode can be used to control power to an external data radio when using the
iRIS as a radio-based gateway.
Typically, an output is configured to follow a schedule for use in powering loads. There is a similar mode termed
"Schedule Plus".
In "Schedule Plus" mode, the relevant output(s) will be activated when a user is logged on to allow sensor
calibration or radio communication testing.
Alternatively, they can be selected for remote control directly from a HydroTel™ base station, activation if any alarm is
active in the iRIS or to operate in response to absolute set points against the current sensor value on Sensor #1 for
applications such as triggering sediment samplers.
See section I/O Configuration for details on the digital output modes.
Figure 9 – Digital Input Debounce Links
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Installation
Figure 10 – Pull-Down Mode Circuit
Figure 11 – Switched 12V Mode Circuit
2.3.4 Serial Sensor Interface (SSI)
The sensor serial interface is a three-wire serial port intended to be used with serial based sensors.
It can operate as either RS-232 or RS-485 signalling.
Terminal Label
RS-232
RS-485
STX
RS232 transmit
RS485 T+
SRX
RS232 receive
RS485 T-
GND
Signal GND
N/A
Table 1 – SSI terminal definition
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Selecting Serial Mode
2.3.4.1 Selecting Serial Mode
The choice of RS-232 or RS-485 modes must be made in both physic jumper selection and firmware configuration
selection. Please see section Serial Sensor Interface (SSI) for more details on configuring the firmware mode.
The RS-232 and RS485 connections cannot be used at the same time. Which is currently being used is selected
by iRIS configuration via iLink.
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Installation
Figure 12 – location of serial mode selection jumpers
Figure 13 – detail depiction of RS-232 / RS-485 jumper positions
2.4 Telemetry Module
The iRIS the can be fitted with any combination of the modules in this section.
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Cellular
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Serial
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WIP Ethernet
2.4.1 Cellular
This chapter contains the following subsection:
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Removing/Fitting the SIM Card
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