SIAECOSYS SCJ313
SIAECOSYS SCJ313 is a compact 3.13-inch TFT color speedometer display for electric motorcycles and scooters. 376×960 resolution at 1000 cd/m² brightness — the best daylight-visible SCJ for handlebar installations. Per the QS Motor product page, this speedometer is **built for Fardriver controllers sourced through SIAECOSYS** (with LIN or CAN BUS communication). Although the underlying hardware uses the same SIAECOSYS CAN/LIN protocol family as VOTOL controllers, the OEM only advertises Fardriver compatibility for this model. Very wide operating voltage (DC 12-150V pack-direct). Shows speed, battery SOC (Li-ion or lead-acid), voltage, distance, mode, and fault codes. Background settings include voltage calibration, wheel size/speed adjustment, mile/km switching, and speed limit. IP65 rated, -20°C to +70°C operating range. USB software upgrade. Sits below SCJ3622-A (3.6" round) and SCJ5066-1 (5" rectangular) in the SIAECOSYS TFT display lineup.
In brief: E-bike display. Protocols: SiAECOSYS ONE-LIN, SiAECOSYS CAN BUS. From $67 across 2 sellers.
Specs verified Sep 12, 2026
Where to Find
Prices tracked across 2 sellersAliExpress - SIAECOSYS Electric Drive Store
$66.51
AliExpress - SIA Tech Store
$73.95 $65.95 + $11.80 shipping
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Specifications
Specifications
- Protocols
- SiAECOSYS ONE-LIN, SiAECOSYS CAN BUS
- Screen Size
- 80mm
- Light Control
- No
- Phone Charger
- No
- Bluetooth
- No
Physical
- Weight
- 190 g
- IP Rating
- IP65
Ports & Connectors
| Pin | Wire color | Function |
|---|---|---|
| 1 | Orange | Turn Signal Left |
| 2 | Black | Power Switch Signal |
| 3 | Green | Ground |
| 4 | Light Blue | Turn Signal Right |
| 5 | Blue | High Beam |
| 6 | Red | Battery + |
| 7 | Green / Yellow | CAN Low |
| 8 | Red / Black | CAN High |
| 9 | Purple | One-Wire Comm |





