Technical specifications
Power supply
9-28V
⎓
(VDC)
Reverse polarity protection with 2.2A resettable
fuse. Surge protection up to ±1000V/2ohms
1.2/50
μ
s
Current consumption at VS+ 12V
⎓
including Raspberry Pi 4, with Ethernet and RS-485
connected, no USB devices
low CPU load: 320mA
100% CPU load, before throttling: 590mA
100% CPU load, throttled: 500mA
Actual current consumption may vary based on
working conditions
Current consumption at VS+ 24V
⎓
including Raspberry Pi 4, with Ethernet and RS-485
connected, no USB devices
low CPU load: 190mA
100% CPU load, before throttling: 320mA
100% CPU load, throttled: 260mA
Actual current consumption may vary based on
working conditions
Raspberry platform compatibility
Pi 4 Model B
Pi 3 Model B+
Pi 3 Model B
Pi 2 Model B
(tested with Pi 4 Model B for regulatory compliance)
Serial communication ports
RS-485 Half-Duplex with automatic data direction
management
RS-232 Full-Duplex
Baud Rates on COMM ports
1200 to 115200
ESD-Protection Voltage on RS-232 TX/RX
±15kV human body model
±8kV contact discharge
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 1.2/50
μ
s;
600W peak pulse power capability at 10/1000
μ
s
waveform
Fail safe feature on RS-485
Yes
Electromagnetic immunity compliance
EN 61000-4-2 (ESD)
EN 61000-4-3 (Radiated RF Field)
EN 61000-4-4 (Burst/fast transient)
EN 61000-4-5 (Surge)
EN 61000-4-6 (Conducted)
EN 61000-4-8 (Power frequency magnetic field)
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
All tests performed with Raspbian Buster Lite and, on Raspberry Pi 4, VL805 firmware version
000137ab.
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Strato Pi Base User Guide
