MAX78630+PPM Evaluation Kit User Manual July 2013 Rev. 0 Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 © 2013 Maxim Integrated Products, Inc.
MAX78630+PPM Evaluation Kit User Manual Table of Contents 1 Introduction ......................................................................................................................................... 4 1.1 Ordering Information .................................................................................................................. 4 1.2 Package Contents...................................................................................................................... 4 1.
MAX78630+PPM Evaluation Kit User Manual Figures Figure 1: MAX78630+PPM EV Kit Typical Application Diagram........................................................................... 5 Figure 2: MAX78630+PPM EV Board Connections .............................................................................................. 8 Figure 3: MAX78630+PPM EV Board Connections ............................................................................................ 10 Figure 4: MAX78630+PPM EV Board Connections ...
MAX78630+PPM Evaluation Kit User Manual 1 Introduction The MAX78630+PPM Evaluation Kit (EV kit) demonstrates the capability of the MAX78630+PPM for monitoring a three-phase AC load using up to three voltages and three currents (sensors included). The EV kit connects to a PC through a USB cable that provides both power and data communication to the board. A Windows®-based graphical user interface (GUI) communicates with the device over a virtual for simplified access to measurement data and controls. 1.
MAX78630+PPM Evaluation Kit User Manual Line 3 Line 1 Neutral Line 2 Three Phase AC Source Host PC MAX78630+PPM Eval Board J4 5V Shunt Isolation 3V3 Reg.
MAX78630+PPM Evaluation Kit User Manual 1.4 Safety and ESD Notes EXERCISE CAUTION WHEN LIVE AC VOLTAGES ARE PRESENT! Do not connect test equipment, ICE emulators or external development boards directly to the MAX78630+PPM hardware. Damage to the MAX78630+PPM and external equipment will occur due to the MAX78630+PPM’s “high side” reference topology. The MAX78630+PPM’s V3P3 (i.e.
MAX78630+PPM Evaluation Kit User Manual 2 Installation 2.1 USB Driver Installation This EV kit includes an isolated USB interface for serial communications with a PC. The FTDI USB controller IC FT2232 performs the USB functions. The FTDI Windows driver presents a virtual COM port for enabling serial communications. The FTDI Windows driver is a certified driver for Windows XP and Windows 7.
MAX78630+PPM Evaluation Kit User Manual 2.2 Powering the EV Kit Board The MAX78630+PPM EV board is normally powered through the USB port (J21).If power needs to be supplied from a different source, a 5V DC can be applied to the connector J16; see Table 16 for the pin assignment. When the MAX78630+PPM EV board is powered through via USB, the same cable also provides the communications link between the host PC and the MAX78630+PPM EV board. 2.
MAX78630+PPM Evaluation Kit User Manual 1. 2. 3. 4. 5. 6. 7. 8. 9. Set Jumper J11 to position 2-3. Set Jumper J15 to position1-2. Connect the Neutral from Source to Load and to J4 (Nin) (Wye-connected systems only). Connect the AC source: Phase A to J1, phase B to J2 and Phase C to J3. Connect Phase A current sensor’ secondary side to J39. a. If using a CT, enable burden resistor by closing jumper J13. Also close jumper J14 to disable the 2nd RC circuit. b.
MAX78630+PPM Evaluation Kit User Manual 2.3.2 2V Delta-Connected Three-Phase Systems For Delta-connected systems, it is possible to measure only two line (Line-to-Line) voltages. For this board, Phase B can be used as reference (V3P3A), therefore measuring VAB and VCB. Jumper J11 must be in position 1-2 (2V Delta).
MAX78630+PPM Evaluation Kit User Manual 1. 2. 3. 4. Set Jumper J11 to position 1-2. Set Jumper J15 to position1-2. Connect the AC source: Phase A to J1, phase B to J2 and Phase C to J3. Connect Phase A current sensor’ secondary side to J39. a. if using a CT, enable burden resistor by closing jumper J13. Also close jumper J14 to disable the 2nd RC circuit. b. if using a Rogowski coil, disable burden resistor by opening jumper J13. Also open jumper J14 to enable the 2nd RC circuit. 5.
MAX78630+PPM Evaluation Kit User Manual 2.3.3 Neutral Current Measurement Considerations It is possible, in certain Wye configurations to measure the current in the neutral conductor via a shunt resistor, therefore replacing the third phase current measurement. This function is enabled by setting jumper J15 to position 2-3. The MAX78630+PPM EV board then connects the shunt voltage to input AIC of the MAX78630. IC (J41) is not measured in this case.
MAX78630+PPM Evaluation Kit User Manual 2.4 Analog Input Jumper Descriptions The following tables describe the various EV board jumpers that determine how analog signals are routed to the inputs of the MAX78630+PPM.
MAX78630+PPM Evaluation Kit User Manual 3 Serial Interfaces Selection and Configuration The MAX78630+PPM has integrated UART, SPI (Slave), and I2C (Slave) interfaces. Only one interface can be active at a time and the selection is done at reset/power-on. The UART interface also supports RS-485/422. The MAX78M6630+PPM EV board includes an isolated RS485/422 transceiver. Table 9 shows the settings of SW4 for the individual interface selection; the signal IFC0 and IFC1 are sampled at reset and power-on.
MAX78630+PPM Evaluation Kit User Manual UART/RS-485/422 Interface Configuration In order to operate the UART through the RS-485/422 transceiver, the jumpers must be set accordingly to Table 12. Table 13 contains the pin assignment of connector J22. Table 12: Jumpers Settings for UART/RS-485/422 Note: Jumper Position J17 2-3 J18 2-3 J28 Removed J29 Removed J27 (See note) J38 (See note) J30 Removed J12 2-3 These jumpers are used to insert a 120Ω termination on the RS-485 bus.
MAX78630+PPM Evaluation Kit User Manual SPI/J16 Interface Configuration Table 15: Jumper Settings for Connecting on J16 Jumper Position J17 Removed J18 Removed J28 Removed J29 Removed J27 Removed J38 Removed J30 Inserted J12 1-2 Table 16: J16 Connector Pin Assignment 16 Pin Number Pin Name Pin Description 1 +5V DC Connect to external source 2 SSB SPI Slave Select (SS) 3 MISO Slave Data Out 4 MOSI Slave Data Input 5 SCK Serial Clock 6 GND Ground Rev 0
MAX78630+PPM Evaluation Kit User Manual 4 Graphical User Interface (GUI) A graphical user interface (GUI) is included on the MAX78630+PPM EV kit CD to facilitate quick evaluation of the MAX78630+PPM energy measurement device. The GUI requires Microsoft.NET Framework 4 on the PC for which the GUI is to execute on. Upon invoking the GUI executable file, an installation wizard may appear if Microsoft.NET Framework 4 is not installed on the PC.
MAX78630+PPM Evaluation Kit User Manual 4.1.2 Device Tab The Device tab shows to current firmware build as well as the temperature and line frequency being measured. 4.1.3 Scaling Tab The Scaling tab is used to set the scale factors for voltages, currents, and power results. They should be set in accordance to the external circuitry that is being used. The scale factors are then used in the following result tabs to convert numeric results obtained from the MAX78630+PPM device to real world values.
MAX78630+PPM Evaluation Kit User Manual 4.1.4 Direct Tab The Direct tab allows access to the all the registers and can both read and write to the registers. The data can be displayed with the scale factor and units applied for convenience. In the example below, the voltage register is being read, so the volts option is used to display the data.
MAX78630+PPM Evaluation Kit User Manual 4.1.5 Command and Configuration Tab The Command and Config tab controls two frequently used registers: • Get and Set Command Register: These buttons essentially do the same thing as the direct register reads and writes, but specifically for the command register while the Direct tab is for any pother registers that need to be accessed. Hex and decimal formats are supported.
MAX78630+PPM Evaluation Kit User Manual 4.1.6 Calibration Tab The Calibration tab is used to calibrate all the measurement channels. The calibration targets can be viewed and changed and the scaling parameters are also displayed for convenience. Use the Calibration Options to select the parameters to be calibrated. The calibration and NV RAM are also saved using the provided button. 4.1.7 Power Tab The Power tab displays the current power being consumed by the loads.
MAX78630+PPM Evaluation Kit User Manual 4.1.8 Energy Tab The Energy tab displays the accumulated power both into and out of the load. All energy counters can be reset to zero in the device with the Reset button. 4.1.9 Fundamental Tab The Fundamental tab is used to display the fundamental and harmonic measurements for voltage, current, and power. The harmonics displayed can be selected with the get/set harmonic buttons.
MAX78630+PPM Evaluation Kit User Manual 4.1.10 Min/Max Tab The Min/Max tab is used to display the minimum and maximum measurements for the parameters selected in the Word Addr column. The units can be selected with the provided pull-down menu and the most recent measurements are updated using the get buttons. All the measurements are reset with the reset button.
MAX78630+PPM Evaluation Kit User Manual 4.1.11 Alarm Tab The Alarm tab is a user-definable display of whatever parameters are required in a particular application. The alarms are described in detail in Sections 2.11 and 2.12 of the MAX78630+PPM IC data sheet.
MAX78630+PPM Evaluation Kit User Manual 4.1.12 Monitor Tab The Monitor tab is a running record of all the communications between the GUI and the target MAX78630+PPM. A log file can be generated to save the transactions for later analysis.
MAX78630+PPM Evaluation Kit User Manual 5 Schematics, Bill of Materials, and PCB Layouts This section includes the schematics, bill of materials, and PCB layouts for the MAX78630+PPM EV board. 5.1 MAX78630+PPM EV Board Schematics . J9 CON1 J8 CON1 J6 CON1 J10 CON1 V3P3 1 R3 10K 0603 V3P3A VC 1 2 3 4 R1 1M, 0.1% C1 0.1uF 0603 R4 750, 0.1% 0603 R2 1M, 0.1% C2 1000pF 0603 DNP LOGO4 1 V3P3A J2 CON4 1 2 3 4 R5 1M, 0.1% R6 1M, 0.1% R7 750, 0.1% 0603 C3 0.
MAX78630+PPM Evaluation Kit User Manual .
MAX78630+PPM Evaluation Kit User Manual 5.
MAX78630+PPM Evaluation Kit User Manual Table 17 continued Item Quantity Reference 23 4 R21,R40,R45,R49 24 1 R41 25 2 R46,R47 26 1 R50 27 2 R52,R59 28 7 R56,R57,R58,R77,R78,R79,R80 29 1 SW1 30 2 SW4,SW5 31 1 U1 32 1 U3 33 1 U7 34 1 U8 35 1 U11 36 1 VR2 37 1 VR3 38 1 Y1 39 1 Y2 Rev 0 Part 0 470 2.2K 1M 120 1K PUSHBUTTON SW DIP-2 MAX78630-32 FT2232C IL516-3E IL510-3E MAX13433EESD+ VBT1-5V 3.3V @ 950mA 20.
MAX78630+PPM Evaluation Kit User Manual 5.
MAX78630+PPM Evaluation Kit User Manual Figure 8: MAX78630+PPM EV Board PCB Bottom View Rev 0 31
MAX78630+PPM Evaluation Kit User Manual 6 Contact Information For more information about Maxim products or to check the availability of the MAX78630+PPM, contact technical support at www.maximintegrated.com/support.