BAFANG SR SD021.01 Speed Sensor Dealer Manual

Content

• 9.1 Introduction of Sensor
• 9.2 Specifications
• 9.3 Sensor Installation

9.1 Introduction of Sensor

Appearance:

• ① Speed sensor
• ② Magnet unit

Details:

• Name: Speed sensor
• Model: SR SD021.01
• Material: The main body of the speed sensor is PA66 + 30%CF, and the cabling is PVC.

Functionality: In the e-bike system, the speed sensor is used with the magnet unit to detect the wheel's rotation signal. The controller in the system calculates the riding speed based on the number of turns and the interval time of this signal. The double hall sensor ensures the security of signal detection and meets the safety requirements of EN15194.

9.2 Specifications

Model: SR SD021.01

9.2.1 Outline and Geometric Size

Diagram Description: A technical drawing showing the dimensions of the speed sensor and magnet unit. Key dimensions include Ø5.5, Ø16.0, 15.9, 10.0, Ø11.7, 3.8, Ø17.0, 06.5, 172°, 3.7, R3.0, 7.0, R2.0, 10.0, 7.0, R10.3.

9.2.2 Cautions

• The pedelec should be stored in a ventilated dry room. Avoid storing the pedelec near strong magnetic objects.
• Should not be used for a long time overload.
• Should avoid wading to use.
• Do not contact magnetic materials with products (mainly axes). ?
• It is forbidden to be knocked during product transportation and installation. ❌
• At installation and disassembly, it shall be carried out in accordance with the prescribed procedures to prevent break line.

9.3 Sensor Installation

9.3.1 Installation Requirements

1. Make sure that the clearance between the speed sensor and the magnet unit is from 10 to 20 mm.

Diagram Description: An illustration showing the correct clearance between the speed sensor and the magnet unit, indicated as 10-20mm.

9.3.2 Installation Steps

1. Place the speed sensor on the rear fork. Fasten the Phillips screw M5*12 clockwise at the tightening torque of 1 N.m. Then insert the end cap onto the screw.
   Diagram Description: Illustration showing the speed sensor being attached to the rear fork with a Phillips screw (M5*12mm) and an end cap. The tightening torque is specified as 1 N.m.
2. Place the magnet unit on the spoke, secure it with the Torx screw M4*6 at the tightening torque of 1.5-2 N·m.
   Diagram Description: Illustration showing the magnet unit being attached to a bicycle spoke with a Torx screw (M4*6mm). The tightening torque is specified as 1.5-2 N·m.

TECH TIPS

Make sure that the clearance between speed sensor and magnet unit is 10-20mm. ✔️