Iono MKR User Guide
November 2018
Revision 002
IMMS13X Iono MKR
a general-purpose, professional input/output module based on Arduino MKR boards
"
Safety information 4
Qualified personnel 4
Hazard levels 4
Safety instructions 5
General safety instructions 5
Battery 5
Introduction 7
Features 8
Usage and connections 9
Device identification 10
Power supply 10
Multi-mode inputs 10
Analog mode 10
Digital mode 10
DI5 and DI6 digital inputs 10
Analog output 12
Relay digital outputs 12
RS-485 serial port 12
Mapping 14
Hardware Installation 15
Opening the case 15
Closing the case 15
Arduino MKR board installation 16
Iono MKR software development 17
Programming 17
Optional components 18
Real Time Clock module 18
Replacing the RTC backup battery 18
Earthquake sensor module 19
Block diagram 20
Board layout 21
Technical specifications 22
Dimensions 25
Disposal 26
Installation and use restrictions 26
Standards and regulations 26
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Iono MKR User Guide
Safety instructions 26
Set-up 26
Conformity Information 27
EU 27
USA 27
CANADA 28
RCM AUSTRALIA / NEW ZEALAND 28
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Iono MKR User Guide
Be sure to always remove the power supply before installing or
removing the Arduino board inside Iono MKR.
Iono MKR must be operated with the plastic case installed.
Follow all applicable electrical safety standards, guidelines,
specifications and regulations for installation, wiring and operations of
Iono MKR modules.
Carefully and fully read this Iono MKR user guide before installation.
Iono MKR is not authorised for use in safety-critical applications where a failure of the
product would reasonably be expected to cause personal injury or death. Safety-critical
applications include, without limitation, life support devices and systems, equipment or
systems for the operation of nuclear facilities and weapons systems. Iono MKR is neither
designed nor intended for use in military or aerospace applications or environments and
for automotive applications or environment. Customer acknowledges and agrees that any
such use of Iono MKR is solely at Customer's risk, and that Customer is solely responsible
for compliance with all legal and regulatory requirements in connection with such use.
Sfera Labs S.r.l. may make changes to specifications and product descriptions at any time,
without notice. The product information on the web site or materials is subject to change
without notice.
Please download and read the Sfera Labs Terms and Conditions document available at:
http://www.sferalabs.cc
Iono and Sfera Labs are trademarks of Sfera Labs S.r.l. Other brands and names may be
claimed as the property of others.
#
Copyright © 2018 Sfera Labs S.r.l. All rights reserved.
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Iono MKR User Guide
Safety information
Carefully and fully read this user guide before installation and retain it for future reference.
Qualified personnel
The product described in this manual must be operated only by personnel qualified for the
specific task and installation environment, in accordance with all relevant documentation
and safety instructions. A qualified person should be capable of fully identifying all
installation and operation risks and avoid potential hazards when working with this product.
Hazard levels
This manual contains information you must observe to ensure your personal safety and
prevent damage to property. Safety information in this manual are highlighted by the safety
symbols below, graded according to the degree of danger.
Indicates a hazardous situation which, if not avoided, will result in death or serious
personal injury.
Indicates a hazardous situation which, if not avoided, may result in death or serious
personal injury.
Indicates a hazardous situation which, if not avoided, can result in minor or moderate
personal injury.
Indicates a situation which, if not avoided, can result in damage of property.
DANGER
WARNING
CAUTION
NOTICE
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Iono MKR User Guide
Safety instructions
General safety instructions
Protect the unit against moisture, dirt and any kind of damage during transport, storage
and operation. Do not operate the unit outside the specified technical data.
Never open the housing. If not otherwise specified, install in closed housing (e.g.
distribution cabinet). Earth the unit at the terminals provided, if existing, for this purpose.
Do not obstruct cooling of the unit. Keep out of the reach of children.
Life threatening voltages are present within and around an open control cabinet.
When installing this product in a control cabinet or any other areas where dangerous
voltages are present, always switch off the power supply to the cabinet or equipment.
Risk of fire if not installed and operated properly.
Follow all applicable electrical safety standards, guidelines, specifications and regulations
for installation, wiring and operations of this product.
Ensure that the product is properly installed and ventilated to prevent overheat.
The connection of expansion devices to this product may damage the product and other
connected systems, and may violate safety rules and regulations regarding radio
interference and electromagnetic compatibility.
Use only appropriate tools when installing this product. Using excessive force with tools
may damage the product, alter its characteristics or degrade its safety.
Battery
This product optionally uses a small lithium non-rechargeable battery to power its internal
real time clock (RTC).
WARNING
WARNING
NOTICE
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Iono MKR User Guide
Improper handling of lithium batteries can result in an explosion of the batteries and/or
release of harmful substances.
Worn-out or defective batteries can compromise the function of this product.
Replace the RTC lithium battery before it is completely discharged. The lithium battery
must be replaced only with an identical battery. See the "Replacing the RTC backup
battery" section for instructions.
Do not throw lithium batteries into fire, do not solder on the cell body, do not recharge, do
not open, do not short-circuit, do not reverse polarity, do not heat above 100°C and protect
from direct sunlight, moisture and condensation.
Dispose of used batteries according to local regulations and the battery manufacturer's
instructions.
WARNING
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Iono MKR User Guide
Introduction
Iono MKR combines the ease of use of the Arduino platform with multiple input and output
interfaces; the result is a rugged, safe, reliable and easy to connect module, suited for
installation both in industrial and residential environments.
Iono MKR ships without any Arduino board, so you can use your preferred Arduino MKR
board, as far as it is fully compatible with the Arduino MKR pinout and fits the Iono MKR
case.
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Iono MKR User Guide
Features
The Iono MKR modules key features are:
✓
12÷28Vdc power supply, with surge and reverse polarity protection, and 1.1A resettable
fuse
✓
compatible with 3.3V operating voltage Arduino MKR boards. Currently the following
boards are supported: Arduino MKR WiFi 1010, Arduino MKR1000 WiFi (with headers),
Arduino MKR ZERO, Arduino MKR GSM 1400, Arduino MKR FOX 1200, Arduino MKR
WAN 1300
✓
4 multi-mode inputs: either to be used as digital or as 0÷30V or 0÷20mA analog signals
✓
2 digital inputs for potential-free contacts or TTL level input/output
✓
1 buffered analog output 0÷10V controlled by the Arduino MKR DAC output
✓
4 power relay outputs rated for 6A at 250V
✓
standard RS-485 interfaces to the Arduino serial pins, with electrostatic discharge
protection
✓
1-Wire, I2C and Wiegand support
✓
optional real time clock with on-board Lithium / Manganese Dioxide back-up battery
✓
optional earthquake sensor module
✓
removable terminal blocks for easier installation
✓
inputs protected against electrostatic discharges and temporary over voltages
✓
double internal insulation between high voltage areas (relay outputs) and all other
components
✓
compact, standard modular housing 3 units size, suitable for mounting on Omega rail.
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Iono MKR User Guide
Usage and connections
CONNECTION EXAMPLE
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Iono MKR User Guide
Device identification
The device can be identified with the information provided in the rating and identification
plate, permanently attached to the side of the case.
EXAMPLE RATING AND IDENTIFICATION PLATE
Power supply
Iono MKR can be powered with DC voltage only:
✓ DC: nominal voltage in the range 12V to 28V (min=11V, max=30V)
Respect the correct polarity shown in the schematic diagram (+ -). The power supply
circuit implements reverse polarity protection using an auto resetting fuse and surge
protection up to ±500V/2ohms 1.2/50μs.
Multi-mode inputs
Iono MKR features 4 multi-mode inputs. Depending on terminal blocks wiring, digital (ONOFF), voltage (0÷30V) or current (0÷25mA) signals can be applied.
Analog mode
When using analog inputs (AV1-4, AI1-4), 0÷30V and 0÷25mA are converted to 0÷3.3V
levels in order to be compatible with the Arduino platform input pins. Both active and
passive 0÷20mA (or 4÷20mA) transmitters can be connected, using the VSO terminal as
power supply; the 0÷20mA transmitter shown in the connection example diagram abobe is
a 2-wire passive type.
Digital mode
In digital mode, an external potential free contact can be connected between terminals
VSO and DI1-4; otherwise, the DIx terminal can be connected to an external voltage signal
(in the range 0÷40V) referred to the GND of the Iono MKR module.
DI5 and DI6 digital inputs
An external potential free contact can be connected between terminals VSO and DIx (x=5,
6); otherwise, the DIx terminal can be connected to an external voltage signal (in the
9÷40V range) referred to the GND of the Iono MKR module.
DI5 and DI6 are connected to the Arduino board through a protection network. If you need
to bypass the protection network to use DI5 and DI6 as general-purpose TTL-level (0-5V)
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Iono MKR User Guide
input/output lines, or for 1-Wire or Wiegand support, you can move jumpers J4 (DI6) and
J5 (DI5) to the BYP position.
Note that, with the jumpers in the BYP position, you should limit the voltage applied to DI5
or DI6 between +0V and +5V (TTL level). Exceeding this voltage range will result in
damage to the Arduino board and Iono MKR.
DI5-DI6 JUMPERS SCHEMATIC
NOTICE
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Iono MKR User Guide
DI5-DI6 JUMPERS POSITION
Analog output
Iono MKR features a 0÷10V output (AO1) which can be controlled by the DAC0 pin of the
Arduino board; the 0÷3.3V range of the DAC0 pin is converted to a 0÷10V output voltage.
This is a sink/source output (the current direction at this output can be both positive and
negative).
Relay digital outputs
Iono MKR has four single pole single throw power relays, with normally open contacts.
The relays are driven by distinct digital outputs of the Arduino board.
RS-485 serial port
Iono MKR uses the Arduino UART TX/RX pins to implement a standard RS-485 serial port.
Simply connect the RS-485 A, B and GND to the RS-485 pins of the terminal block.
The RS-485 port is protected from ESD and voltage surges, and supports half-duplex
communication up to to 115200 bps.
The RS-485 TX/RX switching is controlled by a digital output pin of the Arduino board
(pin%4). You should set pin 4 high to enable transmission on the RS-485, and set it low to
allow reception of incoming data.
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Iono MKR User Guide
A 120 Ohm termination resistor between A and B can be enabled installing jumper J3.
RS-485 JUMPERS SCHEMATIC
RS-485 JUMPERS POSITION
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Iono MKR User Guide
Mapping
The following table shows the mapping of the inputs and outputs of the Iono MKR module
to the related pins of the Arduino platform.
Iono MKR inputs and outputs
Arduino pins
DI1 – AV1 – AI1
A1
DI2 – AV2 – AI2
A2
DI3 – AV3 – AI3
A3
DI4 – AV4 – AI4
A4
DI5
7 (DEF) - 0 (BYP)
DI6
5 (DEF) - 1 (BYP)
O1
3
O2
2
O3
A6
O4
A5
AO1
A0/DAC0
RS-485
RX (13) / TX (14)
RS-485 TX-ENABLE
4
I2C SDA for optional RTC and D7S
SDA (11)
I2C SCL for optional RTC and D7S
SCL (12)
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Iono MKR User Guide
Hardware Installation
For the initial set-up, the plastic DIN rail case must be removed to access the circuit
boards and internal connectors.
The case also needs to be opened to connect a USB cable to the programming port of the
Arduino board, and if the factory configuration of the internal jumpers for the RS-485
termination resistors or digital input configuration must be changed (see below).
Before opening the Iono MKR case, disconnect all power sources and any connection to
external devices.
Opening the case
Follow these steps, in the exact order, to open the case:
1. Remove the green pluggable terminal blocks
2. Remove the black plastic DIN rail hook
3. With a small flat screwdriver gently separate the bottom case and boards assembly
from the top cover
4. The circuit boards assembly will simply slide out of the case, as it is mechanically held
in place by the bottom case only
Closing the case
5. Replace the circuit boards assembly inside the case; ensure that the terminal block
connectors are aligned with the opening in the case
6. Replace the case bottom, then gently push the other side in place
7. Replace the black plastic DIN rail hook.
OPENING AND CLOSING THE CASE
NOTICE
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Iono MKR User Guide
Arduino MKR board installation
To install your own Arduino MKR board in Iono MKR, or replace a pre-installed board, no
tools are required. The Arduino MKR board top side pin headers (female) connect to the
pin headers (male) of the top Iono MKR board. The Arduino MKR board is installed upside
down, with the micro USB programming near the relay outputs terminal block.
Static electricity can damage the components in your system. To protect your system's
components from static damage during the installation process, touch any of the unpainted
metal surfaces on your computer's frame or wear an ESD wrist strap before handling
internal components. Either method will safely discharge static electricity that's naturally
present in your body.
When handling the Arduino MKR, be sure to hold it along the side edges using your thumb
and index finger. Avoid touching the components and pin connectors as damage can
occur.
NOTICE
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Iono MKR User Guide
Iono MKR software development
Since Iono MKR is just a super-sized I/O shield for a standard Arduino MKR board, you
don’t need any specific library to work on it.
Our libraries and examples, available with source code on GitHub, will provide you with
some handy utilities to speed up your development, including functionalities to monitor the
inputs (filtering out possible noise) and control the outputs, HTTP APIs, Modbus support
and much more.
Go to https://github.com/sfera-labs to access the code and documentation.
Programming
The Arduino MKR board, when mounted into a Iono MKR module, must be programmed
through its micro USB port.
PROGRAMMING THE ARDUINO BOARD
Connect the adapter to a PC and perform the programming as usual. This operation does
not require the Iono MKR module to be connected to a power supply.
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Iono MKR User Guide
Optional components
Real Time Clock module
Iono MKR can be shipped with an optional, factory-installed hardware real time clock with
a dedicated long-life non-rechargeable back-up battery.
The battery is only used to power the RTC chip when the main power is not available.
Depending on operating conditions it should last up to two years if the Iono MKR board is
not powered, more if the Iono MKR receives external power.
The RTC module is based on the Microchip MCP79410 real-time clock/calendar chip. It is
connected to the Arduino MKR via the I2C bus.
OPTIONAL REAL TIME CLOCK MODULE AND BATTERY
Replacing the RTC backup battery
The Iono MKR RTC module uses a CR1025 Lithium / Manganese Dioxide (Li/MnO2)
battery.
Improper handling of lithium batteries can result in an explosion of the batteries and/or
release of harmful substances.
Worn-out or defective batteries can compromise the function of this product.
KEEP OUT OF REACH OF CHILDREN. Swallowing may lead to serious injury or death in
as little as 2 hours due to chemical burns and potential perforation of the esophagus.
Immediately see doctor.
WARNING
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Iono MKR User Guide
Replace the RTC lithium battery before it is completely discharged. Replace the battery
every 5 years even if the battery is still working properly. The lithium battery must be
replaced only with an identical CR1025 Lithium / Manganese Dioxide (Li/MnO2) battery.
Do not throw lithium batteries into fire, do not solder on the cell body, do not recharge, do
not open, do not short-circuit, do not reverse polarity, do not heat above 100°C and protect
from direct sunlight, moisture and condensation.
Dispose of used batteries according to local regulations and the battery manufacturer's
instructions.
The RTC backup battery holder is soldered to the bottom layer of the RTC module circuit
board. The battery is not accessible from the outside. You should first remove the case top
body to gain access to the Iono MKR circuit boards.
Before opening the Iono MKR Base case, disconnect all power sources and any
connection to external devices, including USB cables.
Use a non-conductive pin or small tool to help extract the battery from its holder. Insert the
new battery with a gentle push. You don't need tools to insert the battery. The battery is
held into place by a spring contact.
Be sure to insert the battery so that the positive (+) terminal of the battery is in contact with
the outer body of the battery holder, and the negative (-) terminal is in contact with the
contact pad of the circuit board, as shown in the photo below.
Reversing the battery polarity may damage the product.
The real time clock will reset its time immediately when the RTC backup battery is
disconnected.
Earthquake sensor module
Iono MKR can be shipped with an optional, factory-installed earthquake sensor module
based on the OMRON D7S vibration sensor. It is connected to the Arduino MKR via the
I2C bus.
This module is soldered to the top-level circuit board and cannot be removed by the user.
NOTICE
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Iono MKR User Guide
Block diagram
BLOCK DIAGRAM
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Iono MKR User Guide
Board layout
BOARD LAYOUT
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Iono MKR User Guide
Technical specifications
Power supply
12…28V⎓ nom. (11…30V⎓ )
Reverse polarity and surge protection up to ±500V/
2ohms 1.2/50μs using an auto resetting fuse and
diodes
Current consumption at VS+ 12V⎓
unconnected inputs and relays off
70mA with Arduino MKR1000 WiFi
Current consumption at VS+ 12V⎓
digital inputs closed to VSO and relays on
165mA with Arduino MKR1000 WiFi
Current consumption at VS+ 24V⎓
unconnected inputs and relays off
40mA with Arduino MKR1000 WiFi
Current consumption at VS+ 24V⎓
digital inputs closed to VSO and relays on
115mA with Arduino MKR1000 WiFi
Arduino platform compatibility
Arduino MKR WiFi 1010, Arduino MKR1000 WiFi
(with headers), Arduino MKR ZERO, Arduino MKR
GSM 1400, Arduino MKR FOX 1200, Arduino MKR
WAN 1300
Inputs
4 multi-mode (digital or analog 0…30V or 0…25mA)
2 digital (also configurable as TTL I/O)
Voltage range at digital inputs (1-4)
0…40V⎓
Current for each digital input (1-4)
2.9mA at VS+ 12V⎓
5.8mA at VS+ 24V⎓
Voltage threshold digital inputs 1-4 (typ.)
VIH: 4.6V
VIL: 3.8V
Voltage range at digital inputs (5-6)
0…40V⎓ in normal mode
0…5V⎓ in TTL mode
Current for each digital input (5-6)
1.8mA at VS+ 12V⎓
3.5mA at VS+ 24V⎓
Voltage threshold digital inputs 5-6 (typ.)
VIH: 4.7V
VIL: 3.9V
Impedance for analog 0…10V inputs (1¸4)
410kΩ
Impedance for analog 0…20mA inputs (1-4)
130Ω
Analog inputs characteristics
Resolution: 12 bits
Linearity: ±1LSB
MAX error: ±2% of full scale
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Iono MKR User Guide
Max cable length for digital inputs (1-6)
30 meters
Max cable length for analog inputs (1-4)
15 meters
Digital outputs
4 power relays with single coil
MAX output contact rating (each output)
Resistive load (cos φ = 1): 6A at 250V~ (1500VA)
Inductive load (cos φ = 0.5): 1A at 250V~ (250VA)
Fluorescent lamps: 150W with 20uF MAX power
factor correction capacitor
Resistive load (DC): 1A at 48Vdc / 0.7A at 60Vdc
Analog output (AO1)
0…10V PWM controlled by Arduino PWM out
max 30 mA source/sink current
Analog output (AO1) voltage output error
2% of full scale
AUX VSO
Max allowable current: 300mA
Min voltage: (Supply voltage) - 1V
AUX 5VO
Max allowable current: 50mA
Min voltage: 4.5V
Communication ports
RS-485 half-duplex with data direction management
controlled by Arduino MKR pin 4
Baud Rates on COMM ports
1200 to 115200
ESD-Protection Voltage on RS-485 A/B
±15kV human body model
±8kV contact discharge
Surge protection on RS-485 A/B
Surge protection up to ±500V/2ohms 1.2/50μs;
600W peak pulse power capability at 10/1000μs
waveform
Fail safe feature on RS-485
Optional with jumpers (not installed)
12-pin terminal block characteristics
Maximum conductor cross section: 1.5 mm2
(16%AWG), or 0.5 mm2 when using ferrules (highly
recommended)#
Recommended stripping length: 5 mm
Screw thread: M2#
Maximum screws tightening torque: 0.25 Nm
8-pin terminal block characteristics
Maximum conductor cross section: 2.5 mm2
(12%AWG)#
Recommended stripping length: 7 mm#
Screw thread: M3
Maximum screws tightening torque: 0.6 Nm
Housing
standard 3M for DIN rail
Operating temperature
0…+50 °C
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Iono MKR User Guide
Storage temperature
-20…+70 °C
Relative humidity
5% to 90% noncondensing
Protection degree
IP20
Weight
128 g (Iono MKR)
160 g (Iono MKR with Arduino MKR1010 WiFi)
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Iono MKR User Guide
Dimensions
DIMENSIONS
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Iono MKR User Guide
Disposal
(Waste Electrical & Electronic Equipment)
(Applicable in the European Union and other European countries with separate
collection systems). This marking on the product, accessories or literature
indicates that the product should not be disposed of with other household
waste at the end of their working life. To prevent possible harm to the
environment or human health from uncontrolled waste disposal, please
separate these items from other types of waste and recycle them responsibly
to promote the sustainable reuse of material resources. Household users
should contact either the retailer where they purchased this product, or their local
government office, for details of where and how they can take these items for
environmentally safe recycling. This product and its electronic accessories should not be
mixed with other commercial wastes for disposal.
Installation and use restrictions
Standards and regulations
The design and the setting up of electrical systems must be performed according to the
relevant standards, guidelines, specifications and regulations of the relevant country. The
installation, configuration and programming of the devices must be carried out by trained
personnel.
The installation and wiring of connected devices must be performed according to the
recommendations of the manufacturers (reported on the specific data sheet of the product)
and according to the applicable standards.
All the relevant safety regulations, e.g. accident prevention regulations, law on technical
work equipment, must also be observed.
Safety instructions
Carefully read the safety information section at the beginning of this document.
Set-up
For the first installation of the device proceed according to the following procedure:
✓
make sure all power supplies are disconnected
✓
install and wire the device according to the schematic diagrams on the specific data
sheet of the product
✓
after completing the previous steps, switch on the 230 Vac supplying the power supply
and the other related circuits.
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Iono MKR User Guide
Conformity Information
The declaration of conformity is available on the internet at the following address:
https://www.sferalabs.cc/iono-mkr/
EU
This device complies with the essential requirements of the following directives and
harmonised standards:
✓
2014/35/UE (Low Voltage)
✓
2014/30/UE (EMC)
✓
EN61000-6-1:2007 (EMC Immunity for residential, commercial and light-industrial
environments)
✓
EN60664-1:2007 (Electrical safety)
✓
EN 61000-6-3:2007/A1:2011/AC:2012 (EMC Emission for residential, commercial and
light-industrial environments)
✓
2011/65/UE (RoHS)
USA
FCC Radio Frequency Interference Statement:
This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following
measures:
• Reorient or relocate the receiving antenna
• Increase the separation between the equipment and receiver
• Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected
• Consult the dealer or an experienced radio/TV technician for help.
Shielded Cables:
Shielded cables must be used with this equipment to maintain compliance with FCC
regulations.
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Iono MKR User Guide
Modifications:
Changes or modifications not expressly approved by the party responsible for compliance
could void the user's authority to operate the equipment.
Conditions of Operations:
This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired
operation.
CANADA
This Class B digital apparatus complies with Canadian ICES-003(B).
Cet appareil numérique de la classe B est conforme à la norme NMB-003(B) du Canada.
RCM AUSTRALIA / NEW ZEALAND
This product meets the requirements of the standard EN 61000-6-3:2007/A1:2011/AC:
2012 - Emission for residential, commercial and light-industrial environments.
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Iono MKR User Guide
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