Maxim Integrated 78M6631 Evaluation Board - Manual (Page 6)

78M6631 Evaluation Board User Manual UM_6631_077
6 Rev 1
1.3 Safety and ESD Notes
EXERCISE CAUTION WHEN LIVE AC VOLTAGES ARE PRESENT!
Standard ESD precautions must be taken when handling electronic equipment. The
78M6631 contains ESD protected interfaces.
Do not connect test equipment, ICE emulators, or external development boards directly to the
78M6631 hardware. Damage to the 78M6631 and external equipment will occur due to the
78M6631’s “high side” reference topology. The 78M6631’s V3P3 (i.e., “high side”) is connected
directly to Neutral (Earth Ground) 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 (per phase):
Voltage Current Line Frequency
110-240 V AC 10 mA – 20A 46-64 Hz
1.4 Firmware Demo Code Introduction
The Firmware Demo Code provides the following features:
• Measurement data such as Watts, Volts, current, VAR, VA, phase angle, power factor, frequency,
date/time, and various alarm statuses. The measurements data of Voltage, current and power are
also available as fundamental and harmonics.
• Control of alarm thresholds, calibration coefficients, temperature compensation, etc.
The following setup is used to facilitate performance evaluation between the user at the PC host and the
firmware code in the board:
• The Command Line Interface (CLI) via HyperTerminal or comparable terminal emulator on a different
operating system. For information about the CLI, see the applicable Firmware Description Document.
The 78M6631 is shipped with Firmware Demo Code Revision 1.0 or later loaded in the 78M6631 chip and
included on the CD. The code revision can be verified by entering the command >i via the command line
interface. Firmware for the Demo Unit can be updated using either the Teridian TFP2 or an in-circuit
emulator such as the Signum Systems ADM51 (www.signum.com).
1.5 Testing the 78M6631 Evaluation Board Prior to Shipping
Before every 78M6631 Evaluation Board is shipped, the following procedures have been performed at the
factory:
• Full Calibration – Precise energy source equipment is used to calibrate the current and voltage. The
temperature is also calibrated at the same time.
• Accuracy Test – This “bench” level test ensures the energy accuracy is within ±0.5%.