Strato Pi CM v3
Compact industrial server based on Raspberry Pi Compute Module, featuring eMMC flash storage, RS-485 communication, wide-range DC power input, real-time clock (RTC), independent hardware watchdog, and secure element for cryptographic functions. Fully compliant with CE, FCC, and IC standards.
DESCRIPTION
A Compact Industrial Raspberry Pi Server
Strato Pi CM is a powerful and space-efficient industrial server built on the Raspberry Pi Compute Module, designed for demanding applications where reliability and continuous operation are essential.
It meets strict international compliance standards, including:
- Low voltage and EMC CE directives
- Harmonised standards for electromagnetic compatibility, electrical safety, and emissions
- RoHS directive for restricted hazardous substances
- FCC and IC regulations for North American markets
Its compact form factor and industrial-grade features make it an ideal choice for professional automation, control, and monitoring systems.
FEATURES
Mounting and Enclosure
Compact and easy to install, the device comes in a 2-module DIN-rail mountable case, with pluggable terminal blocks for power and serial connections—ideal for industrial environments.
Power Supply
Reliable and protected power input for demanding applications:
- 9–28V DC input range
- Surge and reverse polarity protection
- 1.1A resettable fuse
- Provides up to 1.9A continuous (3A peak) to the Compute Module’s 5V pins at 24V DC
Connectivity
Designed to support key industrial interfaces:
- RS-485 serial port, opto-isolated and ESD-protected
- 2 × USB 2.0 type-A ports, each with power control and fault detection
- 10/100 Mbps Ethernet port for network communication
Storage
Built-in eMMC flash storage via Raspberry Pi Compute Module:
- Options available: 8 GB, 16 GB, or 32 GB
- Suitable for embedded systems requiring reliable onboard storage
High Reliability and Security
Equipped with advanced features to ensure system resilience:
- Independent hardware watchdog controlled via GPIO for automatic recovery
- Real-time clock (RTC) with replaceable backup battery
- Microchip ATECC608 secure element for encryption and device identity
- Integrated bootloader for in-field microcontroller firmware updates via Raspberry Pi
Additional Features
- GPIO-controlled LED for user-defined status or alerts
- Power and serial activity LEDs for quick diagnostics
- Recessed push-button behind the front panel, connected to a GPIO pin for customizable input
HIGHTLIGHT
Power Supply
Strato Pi CM is designed to deliver stable and reliable performance in demanding 24/7 industrial environments. It supports a wide DC input range (9–28V) and is engineered to handle:
- High levels of ripple and noise
- Voltage fluctuations and transient conditions
The power section includes:
- Oversized filtering components: electrolytic capacitors, diodes, and inductors
-
High-efficiency step-down converter with:
- ~95% efficiency
- Up to 1.9A continuous output (3A peak)
- Integrated protections: overcurrent, overvoltage, thermal shutdown
- Reverse polarity protection with resettable fuses
- Surge protection up to ±500V (2Ω, 1.2/50μs)
Real-Time Clock (RTC)
For applications that require accurate timekeeping without internet connectivity, Strato Pi CM integrates a battery-backed real-time clock.
- Based on the NXP PCF2131 RTCC chip
- Connected via the I²C interface
- Automatically switches to a replaceable CR1025 lithium battery during power loss
- Offers advanced timekeeping features beyond standard clock functionality
- In always-powered scenarios, the battery lifespan exceeds 10 years
RS-485 Serial Interface
Strato Pi CM provides a robust, isolated RS-485 interface, ideal for industrial automation.
- Opto-isolated from the main power supply to prevent ground loops
- Isolation achieved with a DC-DC converter and three high-speed opto-couplers
-
Integrated microcontroller manages RS-485 direction automatically:
- No special configuration required
- Fully compatible with Raspberry Pi’s TX/RX pins
Hardware Watchdog
To ensure maximum system uptime, Strato Pi CM includes an independent hardware watchdog.
- Resets the system automatically if the software becomes unresponsive
- Fully separate from the Raspberry Pi’s internal watchdog
- Controlled via GPIO pins, allowing seamless integration into custom applications
- Essential for unattended or mission-critical systems
Mechanical Construction
Strato Pi CM is housed in a 2-module DIN-rail mountable case, designed for professional industrial installations.
- Standard modular enclosure, suitable for electrical cabinets
- Omega-rail mount for easy integration
- Removable 5-position terminal block (3.81 mm pitch) on the top for power and serial connections
- Industrial-grade build for long-term durability