Microchip Technology ARD00342 User Manual
MCP3901 AND PIC18F65J90
ENERGY METER
REFERENCE DESIGN
© 2012 Microchip Technology Inc.
DS51968A-page 13
Chapter 2. Hardware
2.1
OVERVIEW
Figures 2-1
show the MCP3901 and PIC18F65J90 and Energy Meter
Reference Design:
FIGURE 2-1:
Top View – Hardware Components.
DANGER
HIGH VOLTAGE
MCP3901 / PIC18F65J90 SHUNT METER
J2
U1
D1
D9D8
D3
D2
J3
LCD1
P1
J4
SW2
SW1
SW3
1
2
4
5
10
9
8
7
6
Legend:
1
=
IR for meter communication
7
=
Push button Switches
2
=
Test points
8
=
9-digit LCD Display with icons for kWh and kVARh
3
=
MCP3901 Analog Front End
9
=
Pulse Output for Active and Reactive
(isolated)
(isolated)
4
=
+9V DC Input (non-isolated)
10
=
USB Connection (isolated)
5
=
Connections to shunt
current sensing resistor
current sensing resistor
6
=
Connections to Line and Neutral
3
C4
0