Technical specifications
Power supply
9-28 V
⎓
(VDC)
Reverse polarity protection with 2.2 A resettable
fuse. Surge protection up to ±1000V/2ohms
1.2/50
μ
s
Battery input
12 V lead acid battery (not provided).
Suggested capacity:
1.2 Ah. Reverse polarity
protection with 2.2 A resettable fuse. Surge
protection up to ±500V/2ohms 1.2/50
μ
s
UPS battery maximum charge voltage
15 V
UPS battery charge current
30...100 mA
Voltage threshold for switching to battery mode
7.2 V, 0.2 V hysteresis
Current consumption at VS+ 12 V
⎓
including Raspberry Pi 4, with Ethernet and RS-485
connected, no USB devices
low CPU load: 320 mA
100% CPU load, before throttling: 590 mA
100% CPU load, throttled: 500 mA
SPBF10X fan option, add: 50mA
Actual current consumption may vary based on
working conditions
Current consumption at VS+ 24 V
⎓
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
SPBF10X fan option, add: 25mA
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
±15 kV human body model
±8 kV contact discharge
ESD-Protection Voltage on RS-485 A/B
±15 kV human body model
±8 kV contact discharge
Surge protection on RS-485 A/B
Surge protection up to ±500V/2ohms 1.2/50
μ
s;
600
W peak pulse power capability at 10/1000
μ
s
waveform
Fail safe feature on RS-485
Yes
All tests performed with Raspbian Buster Lite and, on Raspberry Pi 4, VL805 firmware version
000137ab.
28
Strato Pi UPS User Guide
