MCP3909RD-3PH1 Microchip Technology, MCP3909RD-3PH1 Datasheet - Page 17

• Manufacturer Part Number: MCP3909RD-3PH1
• Description: REF DESIGN MCP3909 3PH ENGY MTR
• Manufacturer: Microchip Technology

Specifications of MCP3909RD-3PH1

• Main Purpose: Power Management, Energy/Power Meter
• Embedded: No
• Utilized Ic / Part: MCP3909, PIC18F2520, PIC18F4550
• Primary Attributes: 3-Ph, 220 VAC, In Case, LCD, USB, GUI
• Secondary Attributes: Opto-Isolated Interface for Safety
• Operating Voltage: 220 V
• Operating Current: 5 A
• Description/function: Energy Meter
• For Use With/related Products: MCP3909
• Lead Free Status / RoHS Status: Not applicable / Not applicable

2.3
FIGURE 2-3:
© 2008 Microchip Technology Inc.
METER OUTPUT
There are two outputs of the PIC18F2520, the CF calibration pulse and the RS-232
interface containing the register information. This meter design isolates both of these
outputs using digital isolator U
to the neutral line of 220V, a DC-DC converter is also included to isolate the power from
P8, the output header. The output header, when used with the USB Interface Module,
interfaces the meter to both the PC and the LCD on the USB interface module for
output display.
Meter Output Diagram.
RS-232 RX, TX
3-Phase Energy Meter
CF Output Pulse
V
Main Board
DD
GNDA
GNDA
DC-DC
Converter
Opto-Isolator
Opto-Isolator
13
and opto-isolator U
U17
EEPROM
GNDB
U13
U10
V
GNDB
U17
DD
P8
10
. With the A
P1
USB Interface Module
GND
Hardware
being referenced
DS51643B-page 13