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Strato Pi Max User Guide
February 2025 - Revision 009
SCMX10XL4A
Strato Pi Max XL with CM4 Wireless, 2GB RAM, Lite
SCMX10XL4B
Strato Pi Max XL with CM4 Wireless, 4GB RAM, Lite
SCMX10XL4C
Strato Pi Max XL with CM4 Wireless, 8GB RAM, Lite
SCMX10XL4F
Strato Pi Max XL with CM4 Wireless, 2GB RAM, 16GB eMMC
SCMX10XL4G
Strato Pi Max XL with CM4 Wireless, 4GB RAM, 16GB eMMC
SCMX10XL4H
Strato Pi Max XL with CM4 Wireless, 8GB RAM, 16GB eMMC
SCMX10XL4K
Strato Pi Max XL with CM4 Wireless, 2GB RAM, 32GB eMMC
SCMX10XL4L
Strato Pi Max XL with CM4 Wireless, 4GB RAM, 32GB eMMC
SCMX10XL4M
Strato Pi Max XL with CM4 Wireless, 8GB RAM, 32GB eMMC
SCMX10XL5A
Strato Pi Max XL with CM5 Wireless, 2GB RAM, Lite
SCMX10XL5B
Strato Pi Max XL with CM5 Wireless, 4GB RAM, Lite
SCMX10XL5C
Strato Pi Max XL with CM5 Wireless, 8GB RAM, Lite
SCMX10XL5D
Strato Pi Max XL with CM5 Wireless, 16GB RAM, Lite
SCMX10XL5F
Strato Pi Max XL with CM5 Wireless, 2GB RAM, 16GB eMMC
SCMX10XL5G
Strato Pi Max XL with CM5 Wireless, 4GB RAM, 16GB eMMC
SCMX10XL5H
Strato Pi Max XL with CM5 Wireless, 8GB RAM, 16GB eMMC
SCMX10XL5I
Strato Pi Max XL with CM5 Wireless, 16GB RAM, 16GB eMMC
SCMX10XL5K
Strato Pi Max XL with CM5 Wireless, 2GB RAM, 32GB eMMC
SCMX10XL5L
Strato Pi Max XL with CM5 Wireless, 4GB RAM, 32GB eMMC
SCMX10XL5M
Strato Pi Max XL with CM5 Wireless, 8GB RAM, 32GB eMMC
SCMX10XL5N
Strato Pi Max XL with CM5 Wireless, 16GB RAM, 32GB eMMC
SCMX10XL5P
Strato Pi Max XL with CM5 Wireless, 2GB RAM, 64GB eMMC
SCMX10XL5Q
Strato Pi Max XL with CM5 Wireless, 4GB RAM, 64GB eMMC
SCMX10XL5R
Strato Pi Max XL with CM5 Wireless, 8GB RAM, 64GB eMMC
SCMX10XL5S
Strato Pi Max XL with CM5 Wireless, 16GB RAM, 64GB eMMC
SCMX10XLZA
Strato Pi Max XL with Zymbit SCM4 Wireless, 2GB RAM, 16GB eMMC
SCMX10XLZB
Strato Pi Max XL with Zymbit SCM4 Wireless, 8GB RAM, 32GB eMMC
SCMX10XS4A
Strato Pi Max XS with CM4 Wireless, 2GB RAM, Lite
SCMX10XS4B
Strato Pi Max XS with CM4 Wireless, 4GB RAM, Lite
SCMX10XS4C
Strato Pi Max XS with CM4 Wireless, 8GB RAM, Lite
SCMX10XS4F
Strato Pi Max XS with CM4 Wireless, 2GB RAM, 16GB eMMC
SCMX10XS4G
Strato Pi Max XS with CM4 Wireless, 4GB RAM, 16GB eMMC
SCMX10XS4H
Strato Pi Max XS with CM4 Wireless, 8GB RAM, 16GB eMMC
SCMX10XS4K
Strato Pi Max XS with CM4 Wireless, 2GB RAM, 32GB eMMC
SCMX10XS4L
Strato Pi Max XS with CM4 Wireless, 4GB RAM, 32GB eMMC
SCMX10XS4M
Strato Pi Max XS with CM4 Wireless, 8GB RAM, 32GB eMMC
SCMX10XS5A
Strato Pi Max XS with CM5 Wireless, 2GB RAM, Lite
SCMX10XS5B
Strato Pi Max XS with CM5 Wireless, 4GB RAM, Lite
SCMX10XS5C
Strato Pi Max XS with CM5 Wireless, 8GB RAM, Lite
SCMX10XS5D
Strato Pi Max XS with CM5 Wireless, 16GB RAM, Lite
SCMX10XS5F
Strato Pi Max XS with CM5 Wireless, 2GB RAM, 16GB eMMC
SCMX10XS5G
Strato Pi Max XS with CM5 Wireless, 4GB RAM, 16GB eMMC
SCMX10XS5H
Strato Pi Max XS with CM5 Wireless, 8GB RAM, 16GB eMMC
SCMX10XS5I
Strato Pi Max XS with CM5 Wireless, 16GB RAM, 16GB eMMC
SCMX10XS5K
Strato Pi Max XS with CM5 Wireless, 2GB RAM, 32GB eMMC
SCMX10XS5L
Strato Pi Max XS with CM5 Wireless, 4GB RAM, 32GB eMMC
SCMX10XS5M
Strato Pi Max XS with CM5 Wireless, 8GB RAM, 32GB eMMC
SCMX10XS5N
Strato Pi Max XS with CM5 Wireless, 16GB RAM, 32GB eMMC
SCMX10XS5P
Strato Pi Max XS with CM5 Wireless, 2GB RAM, 64GB eMMC
SCMX10XS5Q
Strato Pi Max XS with CM5 Wireless, 4GB RAM, 64GB eMMC
SCMX10XS5R
Strato Pi Max XS with CM5 Wireless, 8GB RAM, 64GB eMMC
SCMX10XS5S
Strato Pi Max XS with CM5 Wireless, 16GB RAM, 64GB eMMC
SCMX10XSZA
Strato Pi Max XS with Zymbit SCM4 Wireless, 2GB RAM, 16GB eMMC
SCMX10XSZB
Strato Pi Max XS with Zymbit SCM4 Wireless, 8GB RAM, 32GB eMMC
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Related Manuals for Sferalabs strato Pi Max XL
Summary of Contents for Sferalabs strato Pi Max XL
- Page 1 Strato Pi Max XL with CM5 Wireless, 16GB RAM, 64GB eMMC Strato Pi Max XS with CM5 Wireless, 16GB RAM, 64GB eMMC SCMX10XLZA SCMX10XSZA Strato Pi Max XL with Zymbit SCM4 Wireless, 2GB RAM, 16GB eMMC Strato Pi Max XS with Zymbit SCM4 Wireless, 2GB RAM, 16GB eMMC SCMX10XLZB SCMX10XSZB ...
- Page 2 Safety information Qualified personnel Hazard levels Safety instructions Introduction Features Device identification Device overview Initial setup Hardware setup Opening the case Closing the case Compute Module board installation PCIe/NVMe SSD installation microSD cards installation Replacing the RTC backup battery Terminal blocks Power supply System architecture Power supply...
- Page 3 Real Time Clock driver Advanced usage Compute Module RP2040 X2-Series Standard Thermal considerations for Strato Pi Max Block diagram Technical specifications Dimensions Disposal Installation and use restrictions Standards and regulations Safety instructions Set-up Conformity Information CANADA RCM AUSTRALIA / NEW ZEALAND Compliance information for Raspberry Pi CM CANADA Strato Pi Max User Guide...
- Page 4 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 Strato and Sfera Labs are trademarks of Sfera Labs S.r.l. Other brands and names may be claimed as the property of others.
- Page 5 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 6 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 7 Battery Strato 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 8 It is available in two versions: • Strato Pi Max XL, with four expansion slots and housed in a 9 modules DIN rail case • Strato Pi Max XS, with one expansion slots and housed in a 6 modules DIN rail case.
- Page 9 • flexible mass storage options: eMMC, dual microSD, high performance M.2 NVMe SSD • dual microSD card architecture. Strato Pi Max XL routes its two microSD card holders to the Compute Module through a high-speed switching matrix, controlled by the on-board RP2040 microcontroller.
- Page 10 available as additional storage. This enables for separate OS/data storage, SD redundancy and in-field full-system upgrades. The microSD slots are hidden, and can be accessed opening the case • 9 modules DIN rail case Strato Pi Max XS: • 1 internal expansion slot. Installed boards are detected and identified for automatic configuration.
- Page 11 The device can be identified with the information provided in the rating and identification plate, permanently attached to the side of the case. EXAMPLE STRATO PI MAX XL RATING AND IDENTIFICATION PLATE EXAMPLE STRATO PI MAX XS RATING AND IDENTIFICATION PLATE...
- Page 12 Strato Pi Max consists of a main board and optional expansion boards. The Strato Pi Max XS supports one expansion board, while the Strato Pi Max XL accommodates up to four. Expansion boards are mounted internally in the expansion slots on the left end of the main board and are numbered from right to left (1 to 4).
- Page 13 • L-side terminal blocks for expansion boards • DIN rail hook handle HIGH (H) SIDE VIEW The high (H) side features: • H-side terminal blocks for expansion boards • SMA connector for the Raspberry Pi antenna (or a pre-cut opening if the antenna is not installed) Each expansion board terminal block has up to eight screw positions, numbered individually from top to bottom (1 to 8).
- Page 14 • Security and fault-tolerance best practices for production deployment. Following this guide ensures a smooth setup process and a resilient, maintainable system. If you have any doubts or questions, contact Sfera Labs support at support@sferalabs.cc. Strato Pi Max User Guide...
- Page 15 Hardware setup For the initial set-up, the plastic DIN rail enclosure may have to be removed to access the circuit boards and internal connectors to install or remove the Compute Module, the microSD cards, PCIe/NVMe devices, or the expansion boards. NOTICE Before opening the Strato Pi Max enclosure, disconnect all power sources and any connection to external devices, including USB and Ethernet cables.
- Page 16 OPENING AND CLOSING THE CASE Compute Module board installation To install your own Raspberry Pi Compute Module board in Strato Pi Max, or replace a pre-installed board, only a screwdriver is required. Align the screw holes and connectors of the Compute Module with the Strato Pi Max circuit board and gently snap in the board.
- Page 17 Strato Pi Max XL has two microSD slots to install flash memory cards. The microSD slots are not directly accessible with the case closed. The slots are located on the bottom side of the main circuit board.
- Page 18 Strato Pi Max is shipped with a CR1220 Lithium / Manganese Dioxide (Li/MnO2) battery installed. 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 Strato Pi Max is not powered, or up to the battery's lifetime if it regularly receives external power.
- Page 19 NOTICE Before opening the Strato Pi Max enclosure, disconnect all power sources and any connection to external devices, including USB cables. Once the circuit boards assembly is extracted from the enclosure, use a non-conductive pin or small tool to help extract the battery from its holder. Insert the new battery with a gentle push.
- Page 20 The PWR blue LED, visible through the front panel of the DIN-rail case, is lit when power supply is available. The Strato Pi Max power supply stage is optimised to deliver up to 30W total power through its 5 V main regulator. This regulator supplies all internal voltages. When the input voltage is below 24 V, if the total power demand is very high, the input current threshold limit could be exceeded, causing the resettable fuse to trip.
- Page 21 System architecture Strato Pi Max features two processing cores: the Raspberry Pi Compute Module and the Raspberry Pi RP2040 microcontroller. In its standard configuration, the RP2040 comes preloaded with firmware that implements the functional logic described below. It operates as an I²C slave device on the Compute Module’s I²C bus, receiving commands and configuration settings.
- Page 22 PWR LED The PWR blue LED, visible through the front panel of the DIN-rail case, is lit when power supply is available. ACT LEDs The red and green ACT LEDs replicate the LEDs of the Raspberry Pi (4 or 5) Model B. Under Linux the green LED will flash to signal eMMC/SD access.
- Page 23 SD and eMMC devices. Strato Pi Max XL has two microSD slots, called SDA and SDB, and the SD matrix allows 2x2 connections between both main/secondary interfaces and SDA/SDB slots.
- Page 24 SD MATRIX BOOT FROM SDA AND SDB ENABLED FOR ADDITIONAL STORAGE The main interface can be connected to SDB instead of SDA, so that boot will be done from SDB. SD MATRIX BOOT FROM SDB With the main interface connected to SDB for boot, the SDA slot can be enabled to be used for additional storage.
- Page 25 Compute Module 5 notes The Compute Module 5 features a high-speed SD interface, which may cause compatibility issues with SD cards that support these speeds. To ensure compatibility, both the Compute Module's bootloader and the OS must be configured to avoid using these settings. For detailed instructions, visit: ...
- Page 26 • Internal high-quality FIPS 800-90 A/B/C Random Number Generator (RNG) • Two high-endurance monotonic counters • Guaranteed unique 72-bit serial number. Refer to its documentation and Microchip’s software resources for usage details. EERAM Strato Pi Max has a Microchip 47L16 16 Kbit SRAM with EEPROM Backup. This chip combines the persistent storage characteristics of a traditional EEPROM, without the limitations in terms of number of erase cycles.
- Page 27 Software configuration and usage All features of Strato Pi Max can be used with any operating system, programming language or framework compatible with Raspberry Pi. This chapter describes how to install and use the drivers for the Raspberry Pi OS (Debian).
- Page 28 Real Time Clock driver The RTC is based on the NXP PCF2131 RTC module and is connected to the Raspberry Pi via its I²C serial bus. 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 clean $ make...
- Page 29 Advanced usage Compute Module If you are using alternative operating systems or need not to use the provided drivers, you can access all the functionalities of Strato Pi Max via dedicated GPIO pins, the I²C bus and the SPI interface. All the features can be accessed using any of the standard methods provided by the operating system, or any library for your programming language or framework of choice.
- Page 30 Configuration parameters (marked [C] or [D] below) are persisted and retained across power cycles. Those marked [D] hold the default value copied to their corresponding runtime control field (detailed in their description) upon power-up of the Raspberry Pi Compute Module. A power-up of the Raspberry Pi Compute Module occurs when: •...
- Page 31 CONFIGURATION COMMANDS ADDR BYTE 1 BYTE 0 BUSY FAIL Register 5 [W] Bit 15-8 KEY: set to 0x2A Bit 7-0 CMD: command 2 = restore factory default configuration Register 6 [R] Result of command written to register 5 Bit 7-0 CMD: processed command Bit 8 OK: set to 1 when command successfully terminated...
- Page 32 BUZZER ADDR BYTE 1 BYTE 0 T ON T OFF REPS TONE Register 17 [R][W] Bit 15-0 T ON: buzzer cycle ON time in milliseconds, applied when REPS is written Register 18 [R][W] Bit 15-0 T OFF: buzzer cycle OFF time in milliseconds, applied when REPS is written Register 19 [R][W] Bit 15-0 REPS: buzzer cycle repetitions, cycle starts when written.
- Page 33 RED LED ADDR BYTE 1 BYTE 0 T ON T OFF REPS Register 26 [R][W] Bit 15-0 T ON: LED cycle ON time in milliseconds, applied when REPS is written Register 27 [R][W] Bit 15-0 T OFF: LED cycle OFF time in milliseconds, applied when REPS is written Register 28 [R][W] Bit 15-0 REPS: LED cycle repetitions, cycle starts when written.
- Page 34 5 = Industrial digital I/O Bit 15-8 reserved SD CARD SWITCH ADDR BYTE 1 BYTE 0 MAIN MAIN Register 39 [R][W] Bit 0 MAIN: main SD interface control 0 = disabled 1 = enabled (default) Bit 1 MAIN CFG [D]: power-up value for MAIN Bit 2 SEC: secondary SD interface control 0 = disabled (default)
- Page 35 USB PORTS ADDR BYTE 1 BYTE 0 ERR2 ERR1 Register 42 Bit 0, 8 ENn [R][W]: USB n control 0 = disabled 1 = enabled (default) Bit 1, 9 ENn CFG [R][W][D]: power-up value for ENn Bit 2, 10 ERRn [R]: USB n fault 0 = OK 1 = fault Bit 7-3...
- Page 36 Bit 15-3 reserved Register 49 [R][W] Bit 15-0 TIMEOUT: heartbeat timeout, in seconds (default = 60) Register 50 [R][W][D] Bit 15-0 TIMEOUT CFG: power-up value for TIMEOUT Register 51 [R][W][C] Bit 15-0 DOWN DELAY: forced power cycle delay after timeout expiration, in seconds (default = 60) Register 52 [R][W][C] Bit 15-0...
- Page 37 Bit 2 SD [C]: SDA/SDB routing switch configuration on power cycle 0 = disabled (default) 1 = switch SDA/SDB upon each power cycle Bit 3 PCIE [C]: PCIe power control configuration on power cycle 0 = disabled (default) 1 = toggle PCIe power state upon each power cycle Bit 15-4 reserved Register 57 [R][W][C]...
- Page 38 Register 69 [R] Bit 15-0 Y: y-axis acceleration raw value (resolution: 14-bit, full scale: ±2 g) Register 70 [R] Bit 15-0 Z: z-axis acceleration raw value (resolution: 14-bit, full scale: ±2 g) SYSTEM ERRORS ADDR BYTE 1 BYTE 0 STUP MSTR EXP4 EXP3...
- Page 39 The standard firmware running on the RP2040 microcontroller implements all the functional logic described in the previous chapters. You can download the latest version of the standard firmware here: https://www.sferalabs.cc/files/stratopimax/fw/latest/strato_pi_max.uf2 The microcontroller can be programmed with user-developed custom firmware, that can replace the factory installed version.
- Page 40 I²C bus addresses The following table lists all components connected to the RP2040 I²C bus, and their R/W addresses. ADDR WRITE READ 47L16 BU31 0x50 [1010000] - SRAM 0xA0 0xA1 0x18 [0011000] - Control Register 0x30 0x31 IIS2DLPC BU36 0x19 [0011001] 0x32 0x33 MCP23009...
- Page 41 Thermal considerations for Strato Pi Max The Raspberry Pi Compute Module draws power and generates heat proportionally to CPU and GPU load. The Strato Pi Max main regulator and expansion boards 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 42 Block diagram Strato Pi Max User Guide...
- Page 43 Strato Pi Max User Guide...
- Page 44 Strato Pi Max User Guide...
- Page 45 Strato Pi Max User Guide...
- Page 46 Strato Pi Max User Guide...
- Page 47 Raspberry Pi Compute Module 4 Raspberry Pi Compute Module 5 Zymbit SCM4 EXPANSION SLOTS Sfera Labs X2 1 slot, Strato Pi Max XS 4 slots, Strato Pi Max XL PCIe M.2 form factor 2242 REAL TIME CLOCK Oscillator frequency 32768 kHz Frequency Tolerance ±3 ppm...
- Page 48 Capacity 16 Kbit (2048 x 8 bits) SRAM r/w cycles Infinite EEPROM store cycles > 1000000 Data retention > 200 years ACCELEROMETER Range ±2g/±4g/±8g/±16g full scale Data rates from 1.6 Hz to 1600 Hz Bandwidth up to 800 Hz INTERNAL TEMPERATURE SENSORS Temperature accuracy ±2 °C Resolution...
- Page 49 Recommended stripping length: 7 mm Screw thread: M3 Maximum screws tightening torque: 0.5 Nm 9 module Din Rail enclosure width: 160.2 mm Dimensions, Strato Pi Max XL height: 91.0 mm depth: 62.0 mm 6 module Din Rail enclosure width: 106.3 mm Dimensions, Strato Pi Max XS height: 90.5 mm...
- Page 50 Dimensions STRATO PI MAX XL DIMENSIONS (mm) Strato Pi Max User Guide...
- Page 51 STRATO PI MAX XS DIMENSIONS (mm) Strato Pi Max User Guide...
- Page 52 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 53 • EN61000-6-3:2021 - 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 54 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: 2021 - Emission for residential, commercial and light-industrial environments.
- Page 55 l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement. Strato Pi Max User Guide...
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