*mydirectindustry

MEM 20

Product catalog summary

Description: The MEM 20 is a magnetic incremental encoder designed for use with brushless motors, motor feedback applications, and rotational speed control. It is a cost-effective, reliable hollow shaft encoder that can be easily mounted on motor shafts. The encoder is suitable for high-speed applications and harsh environments, providing two square wave outputs in quadrature for counting and direction information.

Electrical Conditions: The encoder operates with a supply voltage between 4.5 and 5.5 VDC and a supply current of 15 to 35 mA without load. It lacks reverse polarity protection and has an output current per channel of -10 to 10 mA. The high-level output voltage ranges from 2.0 to 5.5 VDC, while the low-level output voltage is 0.8 VDC. The encoder features a resolution of 64 counts per revolution (cpr) and an ESD voltage tolerance of 2 kV.

Environmental Conditions: The operating temperature range is from -20°C to 85°C. The encoder can tolerate a magnet axis displacement of 0.2 mm relative to the sensor center.

Mechanical Conditions: The outer dimensions of the encoder are Ø 22.0 x 12 mm, with a shaft diameter of Ø 3.0 h7 mm. The required shaft length is 6 mm with a tolerance of -0.5 mm. The maximum allowable axial shaft play is 0.2 mm, and the radial shaft play is 0.025 mm.

Connector Pin Configuration: The encoder uses a 4-pin Molex connector with the following pin assignments: Pin 1 - Signal A, Pin 2 - Signal B, Pin 3 - Supply Voltage (UB), Pin 4 - Ground (GND).

Catalog excerpts

Data Sheet MEM 20 www.pwb-encoders.com precision works better Incremental Encoder Magnetic Ordering Code MEM 20 - I - 2 - 64 - 05 - D - S - LO Description The MEM 20 is a magnetic incremental encoder. He is a reliable low cost hollow shaft encoder that can be fixed quickly and easily on the motor shaft. The encoder is developed for brushless motors, motor feedback applications and rotational speed control. The MEM 20 is a real time system for high speed applications and rough environments. The encoder provides two square wave outputs in quadrature (90 degrees phase shifted) for counting and direction information. Power supply and signals are provided by a 4 pin Molex connector. PWB encoders GmbH Am Goldberg 2 D-99817 Eisenach Germany [email protected] / www.pwb-encoders.com

Open the catalog to page 1

Data Sheet MEM 20 www.pwb-encoders.com precision works better Electrical conditions Parameter Supply voltage Supply current Reverse polarity protection Output current per channel High level output voltage Low level output voltage Pulse with Phase shift Resolution Protection class ESD voltage Environment Operating temperature Magnet axis displacement ESD Warning: Normal handling precautions should be taken to avoid static discharge damage to the sensor. MEM 20 IE Rev.1.3 / 13.07.2015 PWB encoders GmbH Am Goldberg 2 D-99817 Eisenach Germany [email protected] / www.pwb-encoders.com

Open the catalog to page 2

MEM 20

MEM 20

Catalog excerpts

All PWB encoders GmbH catalogs and technical brochures