Description
The Strato Pi CAN board enhances the Raspberry Pi computer with several hardware features to make it suitable for use in industrial and automotive applications where reliability and service continuity are key requirements.
This add-on board is the the core of our Strato Pi CAN server and Strato Pi Touch Display and can be purchased separately for product evaluation, prototypes developments, or custom embedded designs.
Features
Mounting:
- standard Raspberry Pi 40-pin GPIO header
- power supply and serial connections on screw terminal block
Power supply:
- 9-65Vdc power supply, with surge and reverse polarity protection, and 1.3A resettable fuse
- up to 2.5A max current to the 5V Raspberry Pi power supply input pins (at 24Vdc)
Serial interfaces:
- Controller Area Network (CAN) V2.0B interface, up to 1 Mb/s, with opto-isolator and electrostatic discharge protection
- standard RS-485 interface to the Raspberry Pi serial line, with opto-isolator and electrostatic discharge protection
High reliability and security:
- hardware watchdog implemented in the Strato Pi board, fully independent from the Raspberry Pi, controlled via GPIO
- real time clock (RTC) with replaceable back-up battery
- embedded Microchip ATECC608A secure element chip
I/O:
- relay with change-over (CO), Single Pole Double Throw (SPDT) terminals
More:
- buzzer, controlled via GPIO
- LEDs for power supply and serial line activity
Specifications
| Power supply | 9-65V⎓ (VDC)
Reverse polarity protection with two parallel 0.65A resettable fuses. Surge protection up to ±500V/2ohms 1.2/50μs |
| Current consumption at VS+ 24V⎓
including Raspberry Pi 3 current, with low CPU/GPU load and no USB devices connected |
80mA without Ethernet, CAN and RS-485
90mA with Ethernet, CAN and RS-485 Actual current consumption may vary based on working conditions |
| Current consumption at VS+ 64V⎓
including Raspberry Pi 3 current, with low CPU/GPU load and no USB devices connected |
40mA without Ethernet, CAN and RS-485
45mA with Ethernet, CAN and RS-485 Actual current consumption may vary based on working conditions |
| Raspberry platform compatibility | Pi 4 Model B Pi 3 Model B+Pi 3 Model BPi 2 Model B |
| Serial communication ports | RS-485 Half-Duplex with automatic data direction management
Controller Area Network (CAN) |
| Maximum speed of RS-485 port | 115200 bps |
| 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 | Yes |
| Maximum speed of CAN interface | 1 Mbps |
| ESD-Protection Voltage on CANH, CANL | ±14kV human body model
±8kV contact discharge |
| Transient Voltage protection on CANH, CANL | -150V to +100V (wave forms of the applied transients in accordance with ISO-7637, Part 1, test pulses 1, 2, 3a and 3b) |
| Maximum output relay contacts rating | Resistive load (DC1): 1A at 48Vdc / 0.6A at 65Vdc |
| Real time clock | Internal RTCC circuit with backup lithium battery. Only use CR1025 Lithium / Manganese Dioxide (Li/MnO2) batteries.
Expected battery life without main power supply: ~2 years |
| Operating temperature | 0…+50 °C |
| Storage temperature | -20…+70 °C |
| Relative humidity | 5% to 90% noncondensing |
| Weight | 45 g |