VOTOL EM50 SP (LIN)
VOTOL EM50 SP is a compact 72V sinewave controller with 50A rated battery current, 55A boost, and 190A peak phase current. Suited for 1-2kW PMSM/BLDC motors — commonly paired with QS90 mid-drive or small QS hub motors in entry-level e-moto / e-scooter builds. Features flux weakening, IP67 waterproofing, and LIN communication. Uses VOTOL's "Old Version" EM/SV-series connector architecture: 3 flush Mini-Fit Jr headers (function 2×8, alarm 2×4, hall 2×3) + screw terminals for power/phase. Programmable via PC with the Old Version USB cable (shared with EM100SP, EM150SP, EM200P).
In brief: 48–72V controller. 35A continuous. 55A peak. Sinewave, sensored, regen, field weakening support. From $80 across 2 sellers.
Type
- VESC Based
- No
Electrical
- Voltage Range
- 48–72V
- Continuous Amps
- 35A
- Peak Amps
- 55A
- Max Phase Amps
- 190A
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
- 955g
- Dimensions (L×W×H)
- 200.0mm × 108.0mm × 65.0mm
- IP Rating
- IP67
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
