Maxim Integrated MAX78630+PPM User Manual
MAX78630+PPM Evaluation Kit
User Manual
July 2013
Rev. 0
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licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time.
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MAX78630+PPM Evaluation Kit User Manual
Table of Contents
1 Introduction ......................................................................................................................................... 4
1.1 Ordering Information .................................................................................................................. 4
1.2 Package Contents...................................................................................................................... 4
1.3 System Requirements ............................................................................................................... 4
1.4 Safety and ESD Notes ............................................................................................................... 6
1.5 Testing the MAX78630+PPM EV Board Prior to Shipping ........................................................ 6
2 Installation ........................................................................................................................................... 7
2.1 USB Driver Installation ............................................................................................................... 7
2.1.1 Confirm COM Port Mapping ............................................................................................. 7
2.1.2 FTDI COM Port Trouble Shooting .................................................................................... 7
2.2 Powering the EV Kit Board ........................................................................................................ 8
2.3 Basic Connection Setup ............................................................................................................ 8
2.3.1 Wye-Connected or 3V Delta-Connected Three-Phase Systems ..................................... 8
2.3.2 2V Delta-Connected Three-Phase Systems .................................................................. 10
2.3.3 Neutral Current Measurement Considerations .............................................................. 12
2.4 Analog Input Jumper Descriptions ........................................................................................... 13
3 Serial Interfaces Selection and Configuration ............................................................................... 14
3.1 UART Interface Settings .......................................................................................................... 14
3.2 SPI Settings ............................................................................................................................. 15
4 Graphical User Interface (GUI) ......................................................................................................... 17
4.1 GUI Initialization ....................................................................................................................... 17
4.1.1 SSI ID Tab ...................................................................................................................... 17
4.1.2 Device Tab ..................................................................................................................... 18
4.1.3 Scaling Tab .................................................................................................................... 18
4.1.4 Direct Tab ....................................................................................................................... 19
4.1.5 Command and Configuration Tab .................................................................................. 20
4.1.6 Calibration Tab ............................................................................................................... 21
4.1.7 Power Tab ...................................................................................................................... 21
4.1.8 Energy Tab ..................................................................................................................... 22
4.1.9 Fundamental Tab ........................................................................................................... 22
4.1.10 Min/Max Tab ................................................................................................................. 23
4.1.11 Alarm Tab ..................................................................................................................... 24
4.1.12 Monitor Tab ................................................................................................................... 25
5 Schematics, Bill of Materials, and PCB Layouts ............................................................................ 26
5.1 MAX78630+PPM EV Board Schematics ................................................................................. 26
5.2 MAX78630+PPM EV Board Bill of Materials ........................................................................... 28
5.3 MAX78630+PPM EV Board PCB Layouts ............................................................................... 30
6 Contact Information .......................................................................................................................... 32
Revision History ........................................................................................................................................ 32
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MAX78630+PPM Evaluation Kit User Manual
Figures
Figure 1: MAX78630+PPM EV Kit Typical Applicat i on Diagram........................................................................... 5
Figure 2: MAX78630+PPM EV Board Connection s .............................................................................................. 8
Figure 3: MAX78630+PPM EV Board Connection s ............................................................................................ 10
Figure 4: MAX78630+PPM EV Board Connection s ............................................................................................ 12
Figure 5: MAX78630+PPM EV Board Electrical Schem atic (1 of 2) ................................................................... 26
Figure 6: MAX78630+PPM EV Board Electrical Schem atic (2 of 2) ................................................................... 27
Figure 7: MAX78630+PPM EV Board PCB Top View ........................................................................................ 30
Figure 8: MAX78630+PPM EV Board PCB Bottom View ................................................................................... 31
Table
Table 1: J15 Jumper Description......................................................................................................................... 13
Table 2: J11 Jumper Description......................................................................................................................... 13
Table 3: J13 Jumper Description......................................................................................................................... 13
Table 4: J19 Jumper Description......................................................................................................................... 13
Table 5: J42 Jumper Description......................................................................................................................... 13
Table 6: J14 Jumper Description......................................................................................................................... 13
Table 7: J20 Jumper Description......................................................................................................................... 13
Table 8: J43 Jumper Description......................................................................................................................... 13
Table 9: SW4 Serial Interface Selection ............................................................................................................. 14
Table 10: SW5 Address Selection ...................................................................................................................... 14
Table 11: Jumper Setting for UART/USB Interface ............................................................................................. 14
Table 12: Jumpers Settings for UART/RS-485/422 ............................................................................................ 15
Table 13: J22 RS-485/422 Connector Pin Assignment ...................................................................................... 15
Table 14: Jumper Setting for SPI/USB Interf ace ................................................................................................. 15
Table 15: Jumper Settings for Connecting on J 16 .............................................................................................. 16
Table 16: J16 Connector Pin Assignment ........................................................................................................... 16
Table 17: MAX78630+PPM EV Board Bill of Mat erial s ....................................................................................... 28
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MAX78630+PPM Evaluation Kit User Manual
PART
TYPE
MAX78630+PPMEVK1#
EV Kit
Windows and Windows XP are registered trademarks of Microsoft Corp.
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.
1.1 Ordering Information
#Denotes a RoHS-compliant device that may include lead that is
exempt under the RoHS requirements.
1.2 Package Contents
The MAX78630+PPM EV kit includes the following:
• MAX78630+PPM EV Board
• Three 50A Current Transformers (CR Magnetics CR-8449-2500-N)
• USB Cable Assembly USB A-B 28/24 1.8M (Tyco/Amp 1487588-3)
• CD with Documentation, GUI Application, and USB Drivers
• Calibration Coefficients Document (Hardcopy Only)
1.3 System Requirements
In addition to an AC source and load for measuring, the MAX78630+PPM EV kit requires use of a PC with the
following features:
• 1GHz processor and 1GB RAM
• Minimum 1024 x 768 video display resolution
• Available USB port
• Microsoft Windows 7 or Windows XP®
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MAX78630+PPM Evaluation Kit User Manual
MAX78630+PPM Eval Board
Burden
Resistor
UART
USB
16 DIOs
RS485
5V
Host PC
Three Phase
AC Source
J1
J2
Neutral
Line 1
Line 2
Burden
Resistor
MAX78630
+PPM
CT1
CT2
Three-phase
Load Under Test
J
4
0
J
3
9
J4
J5
Shunt
Note:
Jumpers
not shown
3V3 Reg.
Voltage
Divider
Voltage
Divider
Isolation
USB
Controller
Isolation
Line 3
CT3
J3
Voltage
Divider
Burden
Resistor
J
4
1
Figure 1: MAX78630+PPM EV Kit Typical Application Diagram
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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., “high side”) is connected directly to
Neutral (Earth Ground) or Line Voltage, creating a ground reference disparity with
any properly grounded external equipment.
The board components and firmware settings are designed to operate with the following nominal AC electrical
ranges:
Voltage Current Line Frequency
10-400V AC 10mA – 50A 46-64Hz
The maximum current is determined by the current transformer (CT) that is provided with t his EV kit:
CR Magnetics model no. CR8449-2500-N.
1.5 Testing the MAX78630+PPM EV Board Prior to Shipping
Before every EV kit is shipped, the board (and sensors) undergoes a single-load point calibration using precise
energy source equipment. The device temperature is also calibrated at the same time. Results printed out on
paper and included with the EV kit.
Note that the board is calibrated using the marked CTs included with the kit. Therefore, CT1 should be
connected to I1, CT2 to I2, and CT3 to I3.
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MAX78630+PPM Evaluation Kit User Manual
Two sequential COM
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.
Upon attaching the MAX78630+PPM EV board to the PC, the Found New Hardware Wizard automatically
launches and installs the appropriate driver files. If your PC does not find the FTDI driver files on its local hard
disk drive, locate and reference the FTDI USB Driver and Utilities subdirectory on the CD. The FT2232
controller is powered from the USB cable and is active even when no AC power is applied to the
MAX78630+PPM EV kit.
Note: If an older FTDI driver has been previously installed, it is recommended to re m ove the older version
before installing this newer FTDI driver. Execute the ftdiClean.exe utility from the F T DI USB Driver and
Utilities subdirectory.
For FTDI driver support on other operating syst ems, refer to the FTDI website at www.ftdichip.com.
2.1.1 Confirm COM Port Mapping
• Launch the Control Panel and click on the System icon.
• The System Properties screen appears. Click on the Hardware tab. Click on Device Manager. Under
Ports (COM & LPT), look for the USB Serial Port assignment.
• Take note of the COM port assignment for the US B S eri al Port.
2.1.2 FTDI COM Port Trouble Shooting
If the FTDI device driver did not install properly, there would be no assigned COM port number for the FTDI
controller. Repeat the USB Driver Install ation, see
Microsoft Windows may associate a Ball Point device to the FTDI USB controller. When this occurs a FTDI
device COM port assignment is available via HyperTerminal but there is no communications data. Verify if a
Ball Point device has been added to the “Human Interface Dev i ces” via the Device manager. See
for access to the Device Manager. If a Ball Point device exists, delete it and unplug and replug the EV kit’s
USB cable.
ports are associated
with the kit. Use the
second COM port
Port numbers may
differ on each PC.
Section 2.1.
Section 2.1.1
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MAX78630+PPM Evaluation Kit User Manual
V1V2
V3
Nin
Nout
I1
J39
I2
J40
I3
J41
J5
J4
J3 J2 J1
J13
J19
J42
J15
J11
MAX78630EVAL V1
J14
J20
J43
CT1
CT2
CT3
LOAD
A
B
C
N
A
B
C
N
Neutral Connection for Wye Configurations
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 t he MAX78630+PPM EV board.
2.3 Basic Connection Setup
This section shows examples of basic connections between the MAX78630+PPM EV board and external
equipment. Additional connection examples can be seen in the MAX78630+PPM IC data sheet. Note that this
board does not directly support voltage transformers (VT) and provides a shun t resistor as alternative to the
current transformer on phase C.
The following examples are only a subset of all possible measurement configurations. Refer to the
MAX78630+PPM IC data sheet for configurations and system connection diagrams.
2.3.1 Wye-Connected or 3V Delta-Connected Three-Phase Systems
For Wye-connected systems, all three-phase (Line-to-Neutral) voltages are measured. The Neutral line is the
reference for all voltages (V3P3A). Jumper J11 must be in position 2-3 (3V Wye/Del ta). It is also possible to
directly measure all three voltages in a Delta configuration. In that case, the Neutral is not accessible and the
MAX78630+PPM EV board is at a virtual center potential.
8 Rev 0
Figure 2: MAX78630+PPM EV Board Connections
MAX78630+PPM Evaluation Kit User Manual
1. Set Jumper J11 to position 2-3.
2. Set Jumper J15 to position1-2.
3. Connect the Neutral from Source to Load and to J4 (Nin) (Wye-connected systems only).
4. Connect the AC source: Phase A to J1, phase B to J2 and Phase C to J3.
5. Connect Phase A current sensor’ secondary side to J39.
a. If using a CT, enable burden resisto r by closing jumper J13. Also close jumper J14 to di sable
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.
6. Connect Phase B current sensor’ secondary side to J40.
a. If using a CT, enable burden resisto r by closing jumper J19. Also close jumper J20 to di sable
the 2nd RC circuit.
b. If using a Rogowski coil, disable burden resistor by opening jumper J19. Also open jumper J14
to enable the 2nd RC circuit.
7. Connect Phase C current sensor’ se condary side to J41.
a. If using a CT, enable burden resisto r by closing jumper J42. Also close jumper J43 to di sable
the 2nd RC circuit
b. If using a Rogowski coil, disable bur den resistor by opening jumper J42. Also open jumper J 14
to enable the 2nd RC circuit
8. Always refer to the IC data sheet for proper connections according to the desired configurat ion.
9. Write the corresponding value of the CONFIG register to the MAX78630+PPM according to the
configuration and the choice of sensors.
Note: If a phase is backwards, reverse the current flow through the respective current sensor.
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MAX78630+PPM Evaluation Kit User Manual
V1V2
V3
Nin
Nout
I1
J39
I2
J40
I3
J41
J5
J4
J3 J2 J1
J13
J19J42
J15
J11
MAX78630EVAL V1
J14
J20
J43
CT1
CT3
LOAD
A
B
C
A
B
C
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).
Figure 3: MAX78630+PPM EV Board Connections
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