Sferalabs Iono Pi Max v2 3+ Lite User Manual

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Iono Pi Max v2 User Guide

November 2023

Revision 020

ICMX20XS Iono Pi Max v2 Solo

ICMX20XPL Iono Pi Max v2 3+ Lite

ICMX20XP1 Iono Pi Max v2 3+ 8GB

ICMX20XP2 Iono Pi Max v2 3+ 16GB

ICMX20XP3 Iono Pi Max v2 3+ 32GB

ICMX20X4L Iono Pi Max v2 4S Lite

ICMX20X41 Iono Pi Max v2 4S 8GB

ICMX20X42 Iono Pi Max v2 4S 16GB

ICMX20X43 Iono Pi Max v2 4S 32GB

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Page 1 Iono Pi Max v2 User Guide November 2023 Revision 020 ICMX20XS Iono Pi Max v2 Solo ICMX20XPL Iono Pi Max v2 3+ Lite ICMX20XP1 Iono Pi Max v2 3+ 8GB ICMX20XP2 Iono Pi Max v2 3+ 16GB ICMX20XP3 Iono Pi Max v2 3+ 32GB...
Page 2: Table Of Contents
Safety information Qualiﬁed personnel Hazard levels Safety instructions General safety instructions Battery Introduction Features Device identiﬁcation Hardware setup Connections Opening the case Closing the case Raspberry Pi Compute Module installation How to ﬂash the eMMC microSD installation The external UPS battery Replacing the RTC backup battery Terminal blocks Power supply...
Page 3 EXP port SD matrix USB ports power management ATECC608 secure element EERAM Push button LEDs Power supply Shutdown enable mode Shutdown wait time Power-off time Power-up delay Power-up mode UPS and battery charger Auxiliary voltage outputs Hardware watchdog Internal fan and temperature sensors Analog inputs AVx: Analog voltage inputs AIx: Analog current inputs...
Page 4 Disposal Installation and use restrictions Standards and regulations Safety instructions Set-up Conformity Information CANADA RCM AUSTRALIA / NEW ZEALAND Iono Pi Max User Guide...
Page 5 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.
Page 6: Safety Information
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.
Page 7: Safety Instructions
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).
Page 8: Battery
Battery Iono Pi Max uses a small lithium non-rechargeable battery to power its internal real time clock (RTC). WARNING 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.
Page 9: Introduction
Introduction Iono Pi Max is an extremely versatile industrial server with a huge variety of Input/Output lines and standard communication interfaces, based on the Raspberry Pi Compute Module, suitable for use in professional and industrial applications where reliability and service continuity are key requirements, and housed in a compact 6 modules DIN rail case.
Page 10: Features
Features Iono Pi Max, all versions: ✓ 10-50Vdc power supply, with surge and reverse polarity protection, and 3.3A resettable fuse ✓ integrated uninterruptible power supply (UPS), with external lead-acid 12V or 24V battery (with reverse polarity, surge and over-current protection) ✓...
Page 11 hardware watchdog can also control the microSD switch matrix, swapping the boot card in case the watchdog is triggered ✓ powerful and user-programmable 32 bit microcontroller (ATSAME54), with 1 MB program memory and 256 KB RAM. The microcontroller is interconnected to the Raspberry Pi via I2C, USB and CAN.
Page 12: Device Identification
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 Iono Pi Max User Guide...
Page 13: Hardware Setup
Hardware setup Connections IONO PI MAX CONNECTION EXAMPLE For the initial set-up, the plastic DIN rail enclosure must be removed to access the circuit boards and internal connectors, to install or remove the Raspberry Pi Compute Module and the µSD cards. The case also needs to be opened if the factory conﬁguration of the RS-485 and CAN termination resistors must be changed (see below), or to connect to the microcontroller programming and debug header.
Page 14: Opening The Case
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 case bottom and boards assembly from the top shell;...
Page 15: How To Flash The Emmc
NOTICE 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.
Page 16: The External Ups Battery
MICRO SD SLOTS The external UPS battery To take advantage of the UPS features of Iono Pi Max, you can connect an external lead acid rechargeable battery to the BATT terminals. See the connection diagram above. WARNING Improper handling of lead acid batteries can result in an explosion of the batteries and/or release of harmful substances.
Page 17 The battery is only used to power the RTC chip when the main power is not available. Depending on operating conditions it should last three or more years if the Iono Pi Max is not powered, or up to the battery's lifetime if it regularly receives external power. The RTC backup battery holder is on the vertical circuit board, opposite the Compute Module slot.
Page 18: Terminal Blocks
VERTICAL BOARD SCREWS 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 negative (-) terminal is facing the vertical circuit board, and touches the contact pad at the center of the battery holder, as shown in the photo below.
Page 19 The maximum conductor cross section is 1.31 mm (16 AWG), or 0.5 mm when using ferrules (highly recommended). Recommended stripping length is 6 mm. Screw thread is M2. Never exceed 0.3 Nm torque when tightening the screws. Two 6 positions terminal blocks are dedicated to the power relays outputs. The maximum conductor cross section is 3.31 mm (12 AWG).
Page 20: Power Supply
THE IONO PI TOP CIRCUIT BOARD WITH TERMINAL BLOCKS Power supply Iono Pi Max can be powered with DC voltage only: ✓ DC: nominal voltage range 10.0 V to 50.0 V, 3 A max input current. Respect the correct polarity shown in the schematic diagram (+ -). The power supply circuit implements reverse polarity protection using auto resetting fuses and surge protection.
Page 21: Battery Charger
Battery charger The Iono Pi Max UPS (uninterruptible power supply) implements a programmable battery charger, that can charge an external lead-acid battery (other chemistries could be supported with future ﬁrmware releases). The battery line is protected by an internal 3.3 A resettable fuse. You can use either 12 V or 24 V batteries.
Page 22: Software Installation And Configuration
Software installation and conﬁguration All features of Iono Pi Max can be used with any operating system, programming language or framework compatible with Raspberry Pi. The following sections describe how to install utility drivers for the Raspberry Pi OS (formerly Raspbian) or to access its features from alternative set-ups. Raspberry Pi OS Kernel module The Iono Pi Max Kernel module can be used to easily access all of Iono Pi Max features via a sysfs ﬁle system.
Page 23: Raspberry Pi Os Socketcan Driver
https://github.com/sfera-labs/rtc-pcf2131 for updated instructions. Download and install: $ sudo apt install git raspberrypi-kernel-headers $ git clone --depth 1 https://github.com/sfera-labs/rtc-pcf2131 $ cd rtc-pcf2131 $ make $ sudo make install $ dtc -@ -Hepapr -I dts -O dtb -o rtc-pcf2131.dtbo rtc-pcf2131.dts $ sudo cp rtc-pcf2131.dtbo /boot/overlays/ Add the following line to /boot/conﬁg.txt: dtoverlay=rtc-pcf2131 Reboot:...
Page 24: Raspberry Pi Os Uart
dtoverlay=sdio,bus_width=4,poll_once=off Raspberry Pi OS UART By default, the Linux serial console is active on the main UART (/dev/ttyAMA0). If you are using the RS-232 or RS-485 interfaces connected to the main UART (see next chapter), you should disable it to avoid console data being sent to the serial port. To disable the ttyAMA0 console service, run: $ sudo systemctl disable serial-getty@ttyAMA0.service and edit the /boot/cmdline.txt ﬁle to delete the serial console conﬁguration:...
Page 25: Using Iono Pi Max
Using Iono Pi Max Most of the features discussed in this chapter are based on features implemented on our ﬁrmware code running on the SAME54 microcontroller. The microcontroller can be programmed with user developed custom ﬁrmware, that could replace the factory installed version. The "Firmware upload and MCU programming" chapter below shows how to install and conﬁgure the programming tools on Raspberry Pi OS or other similar Linux distributions.
Page 26 The RS-485 port is galvanically isolated using a dedicated isolated differential line transceiver and a high-efﬁciency DC-DC converter. This conﬁguration should prevent ground loops between devices connected through this port. The IGND terminal is the isolated ground reference for the RS-485 serial lines. Always use this line, not GND, for the RS-485 connection.
Page 27: Can Fd Port
RS-485 JUMPERS AND SWITCH POSITION CAN FD port The CAN interface is based on the Microchip MCP2518FD CAN FD Controller and the Microchip MCP2558FD high-speed CAN FD transceiver. They implement both CAN 2.0B and CAN FD modes, with support for up to 8 Mbps data rate and 1 Mbps arbitration rate. The CANH and CANL lines are available on the terminal block.
Page 28: Exp Port
CAN TERMINATION JUMPER POSITION EXP port The EXP port is a proprietary 5V bidirectional I2C interface exposed on a 6-position RJ12 socket that can be used to connect external devices. NOTICE All lines of the EXP port are at 5V level. Do not connect incompatible devices, like 3.3V I2C devices, telephone equipment or any other device not speciﬁcally designed to be connected to this proprietary port.
Page 29: Sd Matrix
Pin # Description 5 VDC out AUX in/out (active low) EXP INTERFACE PLUG PINS SD matrix Iono Pi Max implements a ﬂexible dual microSD card architecture. Iono Pi Max routes its two microSD card holders to the Compute Module through a high- speed switching matrix, controlled by the on-board microcontroller.
Page 30 NOTICE Disconnecting an SD card from the Compute Module's SD interfaces when partitions from the card are mounted at the operating system level, can result in ﬁle system and data corruption. The Iono Pi Max matrix and the microcontroller don't check for card usage and don't provide any safety mechanism to prevent improper disconnection of the SD cards.
Page 31: Usb Ports Power Management
SD MATRIX BOOT FROM SDB Finally, with the SDX interface connected to SDB for boot, the SDA slot can be enabled to be used for additional storage. SD MATRIX BOOT FROM SDB AND SDA ENABLED FOR ADDITIONAL STORAGE It is also possible to disable both the SDX and SD1 interfaces. This conﬁguration could be used with the Compute Module versions that have the embedded eMMC storage, when no external SD card is needed.
Page 32: Atecc608 Secure Element
USB PORTS These ports are individually controlled by the MIC2076, a power distribution controller with circuit protection. The MIC2076 is internally current limited and has thermal shutdown that protects the device and load (0.5A max). A fault status output ﬂag is asserted during over- current and thermal shutdown conditions.
Page 33: Eeram
✓ Networking key management support ✓ Turnkey PRF/HKDF calculation for TLS 1.2 & 1.3 ✓ Ephemeral key generation and key agreement in SRAM – Small message encryption with keys entirely protected ✓ Secure boot support ✓ Full ECDSA code signature validation, optional stored digest/signature – optional communication key disablement prior to secure boot ✓...
Page 34: Power Supply
Each LED has controllable general brightness, and independent brightness control of the primary red, green and blue colors. The sysfs control ﬁles are l<n>_br, l<n>_r, l<n>_g and l<n>_b in the led/ directory (I2C control registers 105-108, 110-113, 115-118, 120-123, 125-128 for CAN, RS-485, RS-232, USR and PWR). When the user changes any of the control registers, that speciﬁc color or brightness level is released for exclusive user's control, and will not be driven again, until the microcontroller is reset, to provide the default indications.
Page 35: Shutdown Wait Time
Shutdown wait time Set the shutdown wait time, in seconds. The factory default is 60 seconds, conﬁgurable with the power/down_delay ﬁle (I2C control register 37). Power-off time Set the power-off time, in seconds. The factory default is 5 seconds, conﬁgurable with the power/off_time ﬁle (I2C control register 38).
Page 36: Auxiliary Voltage Outputs
Starting from a power off condition, Iono Pi Max will not power-up if only the back-up battery is connected. Battery voltage and charge current can be monitored reading ﬁles ups/charger_mon_v, in mV (I2C control register 147), and ups/charger_mon_i, in mA (I2C control register 148). Note that, when Iono Pi Max is being powered by the UPS battery, ups/charger_mon_v continues to show the battery voltage, while ups/charger_mon_i returns a value close to zero.
Page 37: Internal Fan And Temperature Sensors
Watchdog default behavior is described below, but all timing parameters and control logic can be modiﬁed through the I2C control registers and sysfs ﬁles. The watchdog is normally disabled. To enable it, set GPIO39 pin to high. While GPIO39 is high, the Iono Pi Max controller will watch for state changes of the GPIO32 heartbeat pin.
Page 38: Avx: Analog Voltage Inputs
The analog section of Iono Pi Max is enabled by default, but can be disabled, turning off the dedicated isolated DC-DC converter, the ADC and the analog front-end stage. The sysfs analog enable ﬁle is analog_in/enabled (I2C control register 69). The ﬁrmware also controls a high-speed ﬁlter for the analog voltage and current inputs.
Page 39: Atx: Temperature Sensors Inputs
ATx: Temperature sensors inputs Iono Pi Max has two inputs dedicated to connect two-wire resistance temperature sensors (RTD). Both Pt100 and Pt1000 standard sensors are supported. To use these inputs, you should ﬁrst set the sensor type in analog_in/at<n>_mode (I2C control register 69).
Page 40: Dtx: Digital Input/Output (Wiegand, 1-Wire)
NOTICE The OCx outputs can operate with positive voltage levels up to 50Vdc. Applying out of range voltages could damage the product and connected devices. NOTICE Open circuit fault detection is implemented in the MAX4896 by a pulldown current source, along with a voltage comparator, which keeps a small current ﬂowing when the contact is open.
Page 41: Ox: Relays
Ox: Relays Iono Pi Max has four relays with change-over (CO), Single Pole Double Throw (SPDT) terminals, with normally open (NO) and normally closed (NC) contacts, driven by a Maxim MAX4896 8-channel relay and load driver. digital_out/o<n> ﬁles (I2C control registers 84-85) are used to set the relays status, and read the status and error conditions.
Page 42: Advanced Usage
Advanced usage Dedicated GPIO pins Iono Pi Max uses several of the Raspberry Pi Compute Module GPIO pins. These pins should not be used for other functions. GPIO pin Direction Description GPIO2/SDA1 C SDA line GPIO3/SCL1 C SCL line GPIO14/TXD serial TX line (RS-232 or RS-485) GPIO15/RXD serial RX line (RS-232 or RS-485)
Page 43: Raspberry Pi I2C Bus Addresses
GPIO pin Direction Description GPIO34 in/out GPIO35 in/out GPIO36 in/out GPIO8 SPI0 CE0 (CAN controller CS) GPIO9 SPI0 MISO (CAN controller SDO) GPIO10 SPI0 MOSI (CAN controller SDI) GPIO11 SPI0 CLK (CAN controller SCK) GPIO22 SD1 CLK GPIO23 SD1 CMD GPIO24 in/out SD1 DAT0...
Page 44: I2C Configuration And Control Registers Map
I2C Conﬁguration and control registers map The following paragraphs list the available control and conﬁguration registers exposed by Iono Pi Max on the I2C bus, at address 0x35. Registers containing values that span on multiple bytes store the least signiﬁcant byte in the ﬁrst byte (byte 0) and the most signiﬁcant one in the last byte.
Page 45 Bit 9 FAIL: set to 1 when command failed Bit 10 FAIL: set to 1 when command being executed Bit 11 FAIL: set to 1 when invalid values are written in command register EXP I2C BRIDGE ADDR BYTE 1 BYTE 0 PI SIDE ADDRESS OP CODE DEVICE ADDRESS...
Page 46 Bit 11-8 BAUD: RS-485 baud rate for TX-enable automatic control 2 = 1200 3 = 2400 4 = 4800 5 = 9600 6 = 19200 7 = 38400 8 = 57600 9 = 115200 Bit 13-12 PAR: RS-485 parity for TX-enable automatic control 0 = none 1 = odd 2 = even...
Page 47 Register 30 Bit 15-0 TIMEOUT: heartbeat timeout, in seconds (default = 60) Register 31 Bit 15-0 DOWN DELAY: forced power cycle delay after timeout expiration, in seconds (default = 60) Register 32 Bit 15-0 SD SWITCH: SD switch control after power cycle triggered by watchdog 0 = SD switch disabled (default) N >...
Page 48 Register 37 Bit 15-0 DOWN DELAY: shutdown delay from the moment it is enabled, in seconds (default = 60) Register 38 Bit 15-0 OFF TIME: duration of power-off, in seconds (default = 5) Register 39 Bit 15-0 UP DELAY: power-up delay after main power is restored, in seconds  (default = 0) ADDR BYTE 1...
Page 49 N > 0 = if the main power source is not available for the time set, a delayed power cycle is automatically initiated Register 48 Bit 3-0 STAT: UPS status 0 = idle 1 = detecting battery 2 = battery disconnected 4 = charging battery 5 = battery charged 6 = battery in use...
Page 50 ANALOG INPUTS ADDR BYTE 1 BYTE 0 AI4E AI3E AI2E AI1E AV4E AV3E AV2E AV1E Register 69 Bit 0 EN: analog converter control 0 = disabled (power off) 1 = enabled (default) Bit 1 HSF: high speed ﬁlter for AV/AI inputs 0 = disabled (default) 1 = enabled Bit 4...7...
Page 51 ADDR BYTE 2 BYTE 1 BYTE 0 Registers 71...74 Bit 23-0 AVx: signed measured voltage value, in mV/100 Registers 75...78 Bit 23-0 AIx: signed measured current value, in µA Registers 79, 78 Bit 23-0 ATx: signed measured temperature value, in °C/100 RELAYS ADDR BYTE 1...
Page 52 2 = fault open 3 = short circuit OPEN COLLECTORS ADDR BYTE 1 BYTE 0 MASK (R)/W 0C4S 0C3S OC2S OC1S Register 84 Bit 0...3 OCx: open collector control 0 = open (default state) 1 = closed Bit 11...8 MASK: bitmap mask for OCx bits (write only) Register 85 Bit 0-1, 3-2, OCxS: open collector status 5-4, 7-6...
Page 53 Register 95 Bit 15-0 AO1: AO1 value, in mV (voltage mode) or µA (current mode) Register 96 Bit 0 EFOT: set to 1 on over-temperature error Bit 1 EFLD: set to 1 on load error Bit 2 EFLD: set to 1 on common mode error ADDR BYTE 1 BYTE 0...
Page 54 LEDS ADDR BYTE 1 BYTE 0 L1 RED L1 GREEN L1 BLUE L1 BRIGHTNESS L2 RED L2 GREEN L2 BLUE L2 BRIGHTNESS L3 RED L3 GREEN L3 BLUE L3 BRIGHTNESS L4 RED L4 GREEN L4 BLUE L4 BRIGHTNESS L5 RED L5 GREEN L5 BLUE L5 BRIGHTNESS...
Page 55 VSO OUTPUT ADDR BYTE 1 BYTE 0 Register 132 Bit 0 EN: VSO control 0 = disabled 1 = enabled (default) Register 133 Bit 15-0 VSO: VSO voltage value (11500 - 24500), in mV (default = 12000) PERIPHERALS CONTROL ADDR BYTE 1 BYTE 0 Register 137...
Page 56 SYSTEM STATUS ADDR BYTE 1 BYTE 0 TEMP PROT PROT PROT PROT PROT Register 140 Bit 0 FAN: fan status 0 = inactive 1 = active Bit 1 5VO PROT: 5VO output protection 0 = output OK 1 = protection enabled, output temporarily disabled Bit 2 5VX PROT: 5VX output protection 0 = output OK...
Page 57 Bit 11 TEMP: system temperature probes status 0 = probes OK 1 = probes failure Bit 12 232 ERR: RS-232 interface status 0 = RS-232 OK 1 = RS-232 failure Bit 13 485 ERR: RS-485 interface status 0 = RS-485 OK 1 = RS-485 failure POWER MONITORING ADDR BYTE 1...
Page 58 SYSTEM TEMPERATURE ADDR BYTE 1 BYTE 0 Register 155 Bit 15-0 TOP: temperature value from sensor on the top side of the main circuit board, in °C/100 Register 156 Bit 15-0 BTM: temperature value from sensor on the bottom side of the main circuit board, in °C/100 Iono Pi Max User Guide...
Page 59   You can download the latest version of the standard ﬁrmware here: https://www.sferalabs.cc/ﬁles/ionopimax/fw/latest/ionopimax-fw.bin   In order to develop a safe and reliable custom ﬁrmware, you should be fully aware of the internal hardware architecture of Iono Pi Max, and of all safety and control requirements needed for your application and installation constraints.
Page 60 If JP2 is not installed, GPIO41 must be high to enable the connection between Pi's GPIO43-45 and the MCU. A two-way jumper, JP1, can be used if you need to feed the SWO serial debug output from the MCU to the Compute Module. Place the jumper in position 1-2 (factory installed) to route SWO to GPIO42, or in position 2-3 to route SWO to the Pi's main UART RX line (GPIO15).
Page 61 Create a program ﬁle (e.g. "openocd-iono.prog") with the following content: source [find interface/sysfsgpio-raspberrypi.cfg] transport select swd source [find target/atsame5x.cfg] reset_config srst_only init targets reset halt program your_fw_file.bin verify reset shutdown where "your_fw_ﬁle.bin" is the path of the ﬁrmware binary ﬁle to be uploaded.    ...
Page 62 Thermal considerations for Iono Pi Max The Raspberry Pi Compute Module draws power and generates heat proportionally to CPU and GPU load. The Iono Pi Max main regulator, battery charger and VSO regulator also generate a substantial heat proportionally to the total amount of current that has to be supplied to the Pi and, if present, external devices.
Page 63 30C AMBIENT TEMPERATURE, LOW ELECTRICAL LOAD (VIN 24 V, IIN 0.15 A) 45C AMBIENT TEMPERATURE, HIGH ELECTRICAL LOAD (VIN 24 V, IIN 0.75 A) Iono Pi Max User Guide...
Page 64 Block diagram Iono Pi Max User Guide...
Page 65 Iono Pi Max User Guide...
Page 66 Iono Pi Max User Guide...
Page 67 Iono Pi Max User Guide...
Page 68 Technical speciﬁcations Note: all values typical, at +25 °C and under normal operating conditions. POWER SUPPLY Power supply operating voltage (VS) ⎓dc 24 V nominal (range 10-50 V), max 3.0 A   Reverse polarity and surge protection with 3.3 A resettable fuse Current consumption at VS+ 12 V⎓...
Page 69 VSO output resettable fuse 1.1 A 5VO output voltage 4.7 V (no load) 4.6 V (10 Ohm load) 5VO output current 500 mA (Max) USB1 port output current 500 mA (Max) USB2 + USB_INTERNAL port output current 500 mA (Max) EXP port output voltage EXP port output current 500 mA (Max)
Page 70 AVx: ANALOG VOLTAGE INPUTS Input voltage range 0…20 V Input impedance > 1 MOhm Total Unadjusted Error (TUE) ±0.06 % of full-scale Resolution 24 bits (Max) AIx: ANALOG CURRENT INPUTS Input current range -0.5…+24 mA Input impedance 240 Ohm Total Unadjusted Error (TUE) ±0.08 % of full-scale Resolution 24 bits (Max)
Page 71 DTx: DIGITAL INPUT/OUTPUT Output voltage VOL: 0.2 V VOH: 5.0 V Input voltage threshold VIH: 2.4 V VIL: 0.8 V Pull-up (+5 V) 10 kOhm Ox: RELAYS Rated current Rated voltage 250 V AC Rated load (AC1, resistive load) 1500 VA Rated load (AC15, cos φ...
Page 72 Resolution 11 bits (0.125 °C) INTERNAL VOLTAGE SENSORS (VS, BATT, VSO) 0…58 V (VS) Voltage range 0…30 V (BATT, VSO) Total Unadjusted Error (TUE) ±0.25 % of full-scale Resolution 12 bits INTERNAL CURRENT SENSORS (VS, BATT, VSO) 0…4 A (VS) Current range 0…1 A (BATT, VSO) Total Unadjusted Error (TUE)
Page 73 Dimensions DIMENSIONS (mm) Iono Pi Max User Guide...
Page 74 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, separate these items from other types of waste and recycle them responsibly to promote the sustainable reuse of material resources.
Page 75 ✓ EN 61000-6-3:2007/A1:2011/AC:2012 - EMC Emission standard for residential, commercial and light-industrial environments The declaration of conformity is available at: https://www.sferalabs.cc 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.
Page 76 CANADA This Class B digital apparatus complies with Canadian ICES-003. Cet appareil numérique de la classe B est conforme à la norme NMB-003 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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