MEC22
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precision works better Description The MEC22 is a high resolution optical hollow shaft encoder that can be fixed quickly and easily on different sizes of motor shafts. The encoder provides two square wave outputs in quadrature (90 degrees phase shifted) for counting and direction information and one index channel (one pulse per revolution). The resolution of the encoder is determined by the number of counts per revolution (CPR). Power supply and signals are provided by a 5 pin Molex connector. Features Small size: 22.0 mm diameter x 21.9 mm length. Quick and easy assembly without touching sensitive components Two channel quadrature output (A / B) Two channel quadrature output with index pulse (A / B / I) Power supply: 5 VDC Output type: TTL compatible Output circuit: pull-up Resolution up to 2048 CPR (counts per revolution) Maximum shaft diameter: 9.525 mm (3/8") Operating temperature range: -20 °C to 85 °C Compliant EU-directive 2002/95/EG (RoHS) PWB encoders GmbH Am Goldberg 2 D-99817 Eisenach Germany info@pwb-encoders.com / www.pwb-encoders.com

precision works better Recommended operating conditions Electrical characteristics are only effective for the range of the operating temperatures. Typical values at 25 °C and VCC = 5 VDC. Parameter Operating temperature Supply voltage Supply current Load capacitance Count frequency High level output voltage Low level output voltage Rise time Fall time Absolute maximum ratings Parameter Storage temperature Operating temperature Humidity exposure Supply voltage Output voltage Output current per channel Encoding characteristics Parameter Pulse width Phase shift ESD Warning: Normal handling...

precision works better Electrical interface Definitions Counts per Revolution (CPR): The number of increments per revolution. One Cycle (C): 360 electrical degrees (°e), one period of the signal. Cycle Error (∆C): The deviation in electrical degrees of the pulse width from its ideal value. It is an indication of cycle uniformity. Pulse Width (P): The number of electrical degrees when an output is “HIGH” during one cycle, nominally 180 °e or half a cycle. Pulse Width Error (∆P): The deviation in electrical degrees of the pulse width from its ideal value of 180 °e. State Width (S): The number...

precision works better Mechanical Notes Parameter Outer dimensions Required shaft length LW Max. allowable axial shaft play of motor Max. allowable radial shaft play of motor Mounting screw size (DIN 84) Tightening torque of the screws Pitch circle diameter Øc Flange bore diameter diameter ØZ Mounting boss diameter Øm Max. mounting boss height hZ Mating connector (Molex) Total weight Moment of inertia of the hub with the code wheel Protection grade according to DIN 40500 Mounting considerations: The MEC22 encoder is designed to self align by using a mounting boss. The drawing shows the...

precision works better Ordering information Ordering code: Motor Shaft Diameter (mm) Number of Channels 2 : 2 Channels 3 : 3 Channels Output option LF : connector without cable LS : connector + standard cable 9.525 (3/8") Note: * only as two channel version available ** interpolation factor Available accessories see page 8 (no parts of standard delivery): - cable 300 mm length (UL1061 / AWG28) - adapter plates for different motors - centering gauge for different motor shafts - fastening screws DIN 84 M1.6x3 or M1.6x4 PWB encoders GmbH RESTRICTED THIS DOCUMENT AND ANY ASSOCIATED DATA CONTAIN...

precision works better Align the base plate to the motor shaft by using the centering gauge Align the housing to the base plate, slide the housing onto the base plate From this position the housing cannot be locked Afterwards fix the base plate to the motor flange using two screws and the hub centers itself on the motor shaft Press the housing into the final position PWB encoders GmbH Am Goldberg 2 D-99817 Eisenach Germany info@pwb-encoders.com / www.pwb-encoders.com

precision works better Turn the housing into its final position, the encoder is now ready for use Do not rotate and pull out the encoder after assembly or when it is in operation. ATTENTION! The encoder is so designed that it may be assembled only one time, otherwise the guarantee will be voided. Note: see IMPORTANT NOTICE (page 8) PWB encoders GmbH Am Goldberg 2 D-99817 Eisenach Germany info@pwb-encoders.com / www.pwb-encoders.com

precision works better Available accessories Standard cable length 300 mm (UL 1061 / AWG 28) Centering gauge for centering the ME base plate on the motor flange or an adapter plate Screws DIN84 M1.6 X 3 or M1.6 X 4 Customized adapter plate IMPORTANT NOTICE The encoder is so designed that it may be assembled only one time, otherwise the guarantee will be voided. The guarantee will be voided by misuse, accident, modification, unsuitable physical or operating environment, operation in other than the specified operating environment, or failure caused by a product for which PWB encoders GmbH is...