FAQ SMARTBOX
RETRACTS
- Can I use a 2S battery with ER-50 NG retracts?
ER-50 NG retracts are rated for 3S LiPo voltage. Therefore, the battery that you have to connect to the retract unit controller, should be a 3S battery.
With a 2S battery, the ER-50 NG retracts will work, but the speed and torque of the retract will be reduced. Depending on the length and weight of the strut and the wheel, and other factors, the performance of the retract with a 2S battery could be enough to operate properly.
- What retracts can be upgraded to a square thread SPINDLE?
All retracts purchased from January 2013. The serial number must start by 13, 14, 15, 16, etc (the first two digits indicate the manufacturing year)
- Can I REVERSE the retract trunion, or change the RETRACTION ANGLE?
This is possible only in the “reversible version” of our retracts, released from January 2015 onwards. The indicative “reversible” is engraved next to the serial number.
- What battery can I use with my retracts?
Electron suggests using a single small battery for retracts and brakes, and don't share the receiver or engine battery.
500-900 mAh will be enough for at least 25 flights, so with a very small battery, you will have power enough for a full flying day.
Wheels & Brakes
The BRAKES haven't enough POWER to stop my plane in the desired distance
Voltage increase: The last software for ER-30 and ER-40 allows to increase the voltage up to 13V (not for ER-50). With 3S LiPo it is posible increase the brake torque a little. Old control units can be updated with the new software: (contact us). Is possible test the controller with 3S LiPo to know if this controller accept 13V. If not, the retracts simply will not run, nothing should burn. The ER-50 is limited to 10V for security, so only mechanical adjustments are posible.
TECHNICALSPECIFICATIONS
SmartBox
| Weight | 80 g | |
| Weight with screen | 155 g | |
| Dimensions | 81 x 61 x 16,5 mm | |
| Screen dimensions | 78 x 56,5 x 12,4 mm | |
| Input Voltage BATT 1 | Check the voltage required for your retract | |
| Input Voltage BATT 2 | Up to 13 V | |
| Inputs | • GEAR signal input (PWM) • BRAKE signal input (PWM) • STEERING signal input (PWM) • 2x Battery Input (XT-30 male socket) |
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| Outputs | • USB-C port (for PC connection) • 3x Retract outputs (XT-30 female socket) • 2x Brake outputs (JR-servo female socket) • 1x Steering Servo output (JR- servo female socket) • 8x Door outputs (JR-servo female socket) • Screen output (USB-C socket) |
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| Max. current per retract output | 7 A (Peak: 10 A) | |
| Max. current per brake output | 6 A | |
| Max. current per door output | 5 A | |
| Steering Servo max. current output | 6 A | |
| Temperature range | -10°C to +85°C |
What's in the box?
1x SmartBox programmed for the indicated retract type and serial number.
1x Color touch screen with cable.
1x Female XT30U battery connector for SmartBox
3x Retract cables compatible with SmartBox
If you have any additional questions, our dedicated support team can offer assistance at any point of your build or setup, as well as answer any queries along the way.
