For more information, please visit the product page. date 06/21/2019 page 1 of 10 SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER FEATURES * * * * * * * * * * patented capacitive ASIC technology low power consumption U, V, W commutation phase channels 2, 4, 6, 8, 10, 12, 20 motor poles w/ incremental resolutions up to 4096 PPR resolutions and poles programmable with AMT ViewpointTM PC software differential line driver versions digitally set zero position with AMT One Touch ZeroTM module or serial commands compact modular package with locking hub for ease of installation radial and axial cable connections -40~125C operating temperature ELECTRICAL parameter conditions/description min power supply VDD 4.5 start up time current consumption with unloaded output VDD-0.1 single ended channels output high level output low level output current (per channel) rise/fall time output high level output low level output current (per channel) rise/fall time 3 differential channels typ max 5 5.5 units V 200 ms 16 mA 8 0.1 15 7 11 0.1 20 20 min typ max V V mA ns V V mA ns units INCREMENTAL CHARACTERISTICS parameter conditions/description waveform CMOS voltage square wave phase difference A leads B for CCW rotation (viewed from front) quadrature resolutions1 48, 96, 100, 125, 192, 200, 250, 256, 360, 384, 400, 500, 512, 768, 800, 1000, 1024, 1600, 2000, 2048, 2500, 4096 index2 one pulse per 360 degree rotation 90 degrees PPR accuracy 0.2 degrees quadrature duty cycle 50 % COMMUTATION CHARACTERISTICS parameter conditions/description channels CMOS Voltage (S) Line Driver (D) motor poles3 2, 4, 6, 8, 10, 12, 20 waveform2 CMOS voltage square wave phase difference WYE motor winding configurations Notes: min typ max units A, B, Z, U, V, W B, B, Z, Z, U, U, V, A, A, V, W, W 120 electrical degrees 1. Resolutions programmed with AMT ViewpointTM PC software. Default resolution set to 2048 PPR. Listed as pre-quadrature, meaning final number of counts is PPR x 4. 2. Zero position alignment set with AMT One Touch ZeroTM module, AMT ViewpointTM PC software, or serial commands 3. Pole counts and waveform direction set via AMT ViewpointTM PC software. Default poles set to 4 poles and counter-clockwise direction. cui.com For more information, please visit the product page. CUI Inc SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER date 06/21/2019 page 2 of 10 MECHANICAL parameter conditions/description min motor shaft length weight typ weight varies by configuration 26 g 0.3 hub set screw to shaft torque units mm axial play rotational speed (at each resolution) max 13.5 3 mm in-lb 48, 96, 100, 125, 192, 200, 250, 256, 384, 400, 500, 512, 800, 1000, 1024, 2048 8000 RPM 360, 768, 1600, 2000, 4096 4000 RPM 2500 2500 RPM max units 125 C 85 % ENVIRONMENTAL parameter conditions/description min operating temperature typ -40 humidity non-condensing vibration 10~500 Hz, 5 minute sweep, 2 hours on each XYZ shock 3 pulses, 6 ms, 3 on each XYZ RoHS yes 5 G 200 G max units SERIAL INTERFACE parameter conditions/description protocol serial UART min controller Driven by onboard Microchip PIC18F25K80. See Microchip documentation for additional details. data rate 8 data bits, no parity, 1 stop bit, least significant bit first cui.com typ 115200 baud For more information, please visit the product page. CUI Inc SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER date 06/21/2019 page 3 of 10 WAVEFORMS Figure 1 Quadrature signals with index showing counter-clockwise rotation I Z A T B S P S S S The following parameters are defined by the resolution selected for each encoder. The encoders resolution is listed as Pulses Per Revolution (PPR), which is the number of periods (or high pulses) over the encoders revolution. Parameter Note: Description Expression Units Notes Pulses Per Revolution This is the user selected value and the format all resolutions are listed in This is the number of quadrature counts the encoder has PPR resolution CPR counts PPR x 4 Counts Per Revolution T period 360/R mechanical degrees P pulse width T/2 mechanical degrees S A/B state width T/4 mechanical degrees This is the width of a quadrature state I index width T/4 mechanical degrees The width of a once per turn index is the state width for A & B lines For more information regarding PPR, CPR, or LPR (Lines Per Revolution) view https://www.cui.com/blog/what-is-encoder-ppr-cpr-and-lpr Figure 2 Commutation signals with index (The programmable direction setting dictates in which direction of rotation U will lead V, and V will lead W) I Z U S S S S S S V P C W T The following parameters are defined by the resolution and pole count selected for each encoder, where PPR = resolution and M = motor poles. Parameter Description Expression Units T period 360/M mechanical degrees P pulse width T/2 mechanical degrees I index width 360/(PPR*4) mechanical degrees S U/V/W state width 60 electrical degrees T/6 mechanical degrees C phase spacing 120 electrical degrees T/3 mechanical degrees cui.com For more information, please visit the product page. CUI Inc SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER date 06/21/2019 page 4 of 10 PART NUMBER KEY For customers that prefer a specific AMT33 configuration, please reference the custom configuration key below. AMT33XX - XXXX - XXXX - XX - XX Base Number Orientation: 2 = Radial 3 = Axial Output Signals: S = CMOS Voltage D = Line Driver Quadrature Resolution (PPR): 0500 0048 0512 0096 0768 0100 0800 0125 1000 0192 1024 0200 1600 0250 2000 0256 2048 0360 2500 0384 4096 0400 Motor Poles: 02 10 04 12 06 20 08 Bore Diameter: 9000 = 9 mm 9525 = 3/8'' 1000 = 10 mm 1100 = 11 mm 1200 = 12 mm 1270 = 1/2" 1300 = 13 mm 1400 = 14 mm 1500* = 15 mm 1587 = 5/8" Direction: "blank" = CCW CW = clockwise *15 mm bore diameter option only available as custom configuration. AMT33-V KITS In order to provide maximum flexibility for our customers, the AMT33 series is provided in kit form standard. This allows the user to implement the encoder into a range of applications using one sku#, reducing engineering and inventory costs. AMT33 kit includes all items shown below. SHAFT ADAPTERS ORDERING GUIDE AMT33XX-V Orientation: 2 = Radial 3 = Axial Output Signals: S = CMOS Voltage D = Line Driver 9 mm 3/8 in 10 mm 11 mm 12 mm 1/2 in 13 mm 14 mm Light Blue Orange Purple Gray Yellow Green Red Blue AMT33 ALIGNMENT TOOL* Shaft adapter is not needed for 5/8" shaft *Alignment Tool comes pre-installed on all AMT33 Series. cui.com PLACEMENT TOOL ALLEN WRENCH For more information, please visit the product page. CUI Inc SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER date 06/21/2019 page 5 of 10 ENCODER INTERFACE CONNECTOR PINOUT Function # AMT332S AMT333S AMT332D AMT333D 1 RX_ENC+ RX_ENC+ RX_ENC+ RX_ENC+ 2 TX_ENC+ TX_ENC+ TX_ENC+ TX_ENC+ 3 U+ U+ U+ U+ 4 GND GND GND GND 5 W+ W+ W+ W+ 6 +5 V +5 V +5 V +5 V 7 V+ V+ V+ V+ 8 A+ A+ A+ A+ 9 N/A N/A A- A- 10 B+ B+ B+ B+ 11 N/A N/A B- B- 12 Z+ Z+ Z+ Z+ 13 N/A N/A Z- Z- 14 MCLR MCLR MCLR MCLR 15 N/A N/A W- W- 16 N/A N/A V- V- 17 N/A N/A U- U- 18* NOISE GND NOISE GND NOISE GND NOISE GND *Pin 18 is not connected internally for standard encoders. Contact CUI for support with high noise applications. AMT332 AMT333 Mating Connector: JST ZPDR-18V-S cui.com For more information, please visit the product page. CUI Inc SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER date 06/21/2019 page 6 of 10 MECHANICAL DRAWING units: mm tolerance: X.XX 0.01 mm hole dia: 0.003 mm AMT332 AMT333 cui.com For more information, please visit the product page. CUI Inc SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER date 06/21/2019 page 7 of 10 ASSEMBLY PROCEDURE STEP 1 STEP 2 1. Begin by rotating the pre-installed alignment tool clockwise and completely to the right so that the pre-installed shaft set screw is visible. 1. Slide the encoder onto the motor shaft applying force only to the placement tool to maintain proper alignment of the encoder's hub and shaft adapter. 2. Select the appropriately sized shaft adapter and insert it into the encoder making sure the adapter is properly aligned with the keyway in the metal hub. No adapter is needed for a 5/8" motor shaft. 2. 3. Select the placement tool and insert it into the encoder. This placement tool holds the encoder's hub and shaft adapter in the proper position for installation onto the motor shaft. 4. Insert screws and fasten the encoder to the motor. 3. Once in contact with the motor body, rotate the encoder until the mounting holes are aligned with the proper bolt circle. STEP 3 1. Insert the Allen Wrench into the notch on the top. 2. Tighten the shaft set screw to the recommended torque settings per the spec. STEP 4 1. Rotate the placement tool and alignment tool counterclockwise until the tabs align with the openings. 2. Remove both tools from the encoder. 3. cui.com For more information, please visit the product page. CUI Inc SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER date 06/21/2019 page 8 of 10 APPLICATION NOTES SERIAL INTERFACE The AMT33 series encoder is designed to operate with a serial UART interface. This interface allows the encoder to be configured and programmed by the AMT ViewpointTM application. Along with programming, the AMT ViewpointTM application uses the serial interface for diagnostics and motor pole alignment. Below are instructions on how to use the serial interface for position zeroing. Table 1 Serial Commands Command Action Use 0 This command sends an ascii `0' (hex value 0x30). This zeros the encoder and sets the index at the current angular position along with the rising edge of the commutation channel U. This position is stored in non-volatile memory and will remain present until a zero command is set again or the encoder is reprogrammed via the AMT ViewpointTM application. Q This command sends an ascii `Q' (hex value 0x51). This command restarts the encoder as if it were power cycled. Table 2 Serial Pins Pin Description Connection TX_ENC+ This is the pin that the encoder transmits serial data on. Connect this pin to the receiver input of your serial/UART interface. RX_ENC+ This is the pin that the encoder receives serial commands on. Connect this pin to your serial/UART interface transmitter output. This pin is used to force the encoder into reset for reprogramming via the AMT ViewpointTM application. Connection of this pin is not required for the above serial commands. MCLRB The serial interface operates at 115200 baud with 8 data bits, no parity, and 1 stop bit, and 1 start bit. This is the standard UART protocol. Data lines TX_ENC+ and RX_ENC+ are high when inactive. Figure 3 Serial Timing Diagram RX_ENC+ Start 0 1 2 3 4 5 6 7 Stop Command: 0 (hex: 0x30, binary: 0b00001100) TX_ENC+ Start 0 1 2 3 4 5 6 Response: \r (hex: 0x0d, binary: 0b10110000) cui.com 7 Stop For more information, please visit the product page. CUI Inc SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER date 06/21/2019 page 9 of 10 APPLICATION NOTES (CONTINUED) COMMUTATION ALIGNMENT AND ZERO POSITION The AMT33 series encoder requires minimal setup time for brushless DC (BLDC) motor applications. Installation can be completed with either a PC with the AMT ViewpointTM application installed, an AMT-OTZ-1 zero alignment module, or any 5V serial interface. The following steps explain the proper commutation alignment procedure for the AMT33 encoder. 1. Ensure AMT33 encoder is set for correct pole count. To verify or change settings use the AMT ViewpointTM software. 2. Mount encoder following AMT Assembly procedure. 3. Use the motor manufacturer's documentation to determine the correct motor phase to energize for alignment. Energized phase will coincide with the rising edge of the AMT33 encoders `U' signal. This typically means energizing phase 1 by applying positive voltage to the wire labeled `phase 1', and grounding the wire labeled `phase 2'. The third wire always remains unconnected. 4. Using a power supply, energize the two wires found previously. This will lock the rotor into a fixed position. 5. Connect AMT33 encoder to an AMT-OTZ-1 zero alignment module, the AMT ViewpointTM application, or any suitable 5V serial interface. 6. Use any of the connected devices to issue an alignment command to the encoder. This will digitally set the rising edge of `U' and the `Z' index to the current angular position. 7. Remove power from motor phase windings; connect motor and encoder to proper motor driver. 8. If the above is done correctly your AMT33 encoder is now ready for operation. As a verification of alignment you may power the encoder, and use an oscilloscope to monitor phase 1 of the motor and the `U' channel of the encoder as you hand spin the motor. If alignment is correct, the square wave generated on the `U' channel will overlap perfectly with the sine wave generated by phase 1 of the motor. If alignment does not match, recheck motor documentation and retry alignment procedure. cui.com For more information, please visit the product page. CUI Inc SERIES: AMT33 DESCRIPTION: MODULAR COMMUTATION ENCODER date 06/21/2019 page 10 of 10 REVISION HISTORY rev. 1.0 description date initial release 06/21/2019 The revision history provided is for informational purposes only and is believed to be accurate. Headquarters 20050 SW 112th Ave. Tualatin, OR 97062 800.275.4899 Fax 503.612.2383 cui.com techsupport@cui.com CUI offers a one (1) year limited warranty. Complete warranty information is listed on our website. CUI reserves the right to make changes to the product at any time without notice. Information provided by CUI is believed to be accurate and reliable. However, no responsibility is assumed by CUI for its use, nor for any infringements of patents or other rights of third parties which may result from its use. CUI products are not authorized or warranted for use as critical components in equipment that requires an extremely high level of reliability. A critical component is any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness.