This manual relates to SBX Firmware V4.0.x
This manual describes the operation modes of the SBX solar charger module used in solar powered radar sensors like PCR2-ODS or TCR-xSS.
After Hardware Init the application code takes control. Following state chart shows the application states.
| State | Description | Load | Heater | Charger | LED Batt | LED Error | LED Charger |
|---|---|---|---|---|---|---|---|
| Init | Hardware checks running | Off | Off | Standby | Off | Off | Off |
| Off | Battery Voltage low Load is switched off |
Off | On when >4W and cold | Run | Warn | Off | PWM |
| On | Battery Voltage nominal | On | On when >4W and cold | Run | PWM(*) | Off | PWM |
| Hot | Battery Temperature high Charging interrupted |
On | Off | Standby | Warn | Off | Off |
| Error | Battery not connected Sensor broken Charger error |
Off | Off | Standby | Warn | On | Off |
(*) 100% is always on, 0% is allways off, 50% is 1s on, 1s off
We decided to not switching on all LEDs all the time to safe energy (while nobody can see the LEDs as SBX is normaly in a box)
After pressing the User Button the LED Batt will display following states for about 30s.
| Off | Battery low |
| PWM (0-100%) | Battery Voltage (Min-Nominal Voltage) |
| Blinking while LED Error is off | Battery Warning (too cold, too hot) |
| Blinking while LED Error is on | Battery Error (disconnected, NTC broken) |
The LED Charger is always activated displaying the Input Power
| Off | No sun |
| PWM (0-100%) | Charging Energy |
LED Error is on after the User Button has been pressed and there is a serious hardware problem with the battery or charger.
The charger starts to operate by its own. If there is a input voltage drop, the charger will re-initialize.