Smart Appliances Guide

3-4
n
Connected Smart Appliances - Gen III
PARTS & ASSEMBLIES
For Service Technician Use Only
Power Management (PM) Board
The Power Management Board performs actual power
measurement; calculang both real power (kW) as well as real
power/me (kW h).
An algorithm in the machine uses the voltage and current
readings to determine power use for the consumer.
Ohms Law: P=E x I (Power = Voltage x Current)
Voltage is detected and measured at connector J1, pins 1-3 for
L1, Neutral, and L2 (if exist).
Current is measured using current transformer(s). Current
Transformer 1 (CT1) will monitor L1 and Current Transformer
2 (CT 2) will monitor L2 (electric dryers, ranges, double ovens).
The output of the Current Transformer(s) is connected to the
Power Management Board at connector J4, pins 1 & 2 (CT1)
and if L2 exists, pins 3 & 4 (CT2).
Typical Power Management Board shown in gure 4.
PM Connectors and Pin-outs
Connector
Number
Pin Funcon
J1
Voltage
Measurement
1 L1
2 Neutral
3 L2 (if exists)
J2
WIDE/WIN
1 5 VDC
2 Data
3 GND
J3
WIDE/WIN
1 5 VDC
2 Data
3 GND
J4
Current
Measurement
1 CT1 +
2 CT1 –
3 CT2 +
4 CT2 –
Figure 4 - Power Management Board
J1
J4
J2
J3