VOTOL EM50-4 (LIN)
VOTOL EM50-4 is a compact 48-72V sinewave controller with 50A rated battery current and 80A boost DC current. Suited for 1-2kW PMSM/BLDC motors — commonly paired with QS90 1000W mid-drive motors in e-scooter builds. Features 18-MOSFET design, flux weakening, IP67 waterproofing, and LIN communication. Uses VOTOL's 'Old Version' EM/SV-series connector architecture: 3 flush Mini-Fit Jr headers + screw terminals. Programmable via PC.
In brief: 48–72V controller. 40A continuous. 80A peak. Sinewave, sensored, regen, field weakening support. From $78 across 2 sellers.
Type
- VESC Based
- No
Electrical
- Voltage Range
- 48–72V
- Continuous Amps
- 40A
- Peak Amps
- 80A
- Max Phase Amps
- 170A
Motor Features
- Regen Support
- Yes
- Drive Mode
- Sinewave
- Sensor Mode
- Sensored
- Field Weakening
- Yes
- Self-Learning
- No
- Dual Motor Support
- No
- Controller Pairing
- No
Inputs
- Throttle Support
- Yes
- PAS Support
- No
Display
- Supports Display
- Yes
- Requires Display
- No
- Protocols
- SiAECOSYS ONE-LIN
Power Switch
- Supports Power Switch
- Yes
- Requires Power Switch
- No
- Requires Pre-charge
- No
Programming
- Via Display
- No
- Via Phone
- No
- Via PC
- Yes
Physical
- Weight
- 850g
- Dimensions (L×W×H)
- 181.0mm × 94.0mm × 50.0mm
- IP Rating
- IP65
Ports & Connectors
Power Input2-position Screw Terminal Block
Power
1Battery +
2Battery -
Phase Wires3-position Screw Terminal Block
Motor Phase
1Phase A
2Phase B
3Phase C
Hall Sensor/
Hall Sensor
15V Power
2None
3Ground
4Hall A
5Hall B
6Hall C
Function Harness (2×8)
Alarm / Anti-theft Harness (2×4)
Alarm Power
security
1Ground
2Alarm Power
Anti-theft Motor Lock
security
1Anti-Theft Key
2Anti-Theft Signal
3Wheel Signal
4None
