Cirrus Logic CRD5490 - Manual (Page 4)

CRD5490-Z
4 DS988RD1
2. HARDWARE OVERVIEW
The CRD5490-Z includes sensors (line voltage and current shunt), a power supply, a CS5490 power
monitor calculation engine, isolation, and an MCU. Figure 1 shows connections of each block.
Make sure that the power source is off before wiring any connection. The AC source is connected to plug IEC 60320
C14, and the AC load is connected to connector IEC 60320 C13. Make sure that all connectors are well connected
before the power source is turned on. Make sure all AC power line wiring is secured to the box and away from contact
before the power source is on.
WARNING
High Voltage Hazard
When the CRD5490-Z is connected to AC lines, high voltage is present inside the box.
Do not remove the protective cover from the CRD5490-Z when power is connected.
The evaluation board connects directly to the AC power line and presents a serious risk of
electric shock and can cause serious injury or death. Extreme caution needs to be
exercised while handling this box. Make sure that the power source is off before wiring any
connection. Make sure that all connectors are well connected before the power source is
turned on. Make sure all AC power line wiring is secured to the box and away from contact
before the power source is on.
Refer to additional warnings at the beginning of this document.
AC Load
Current
Sensor
Voltage
Divide Sensor
+3.3V
Voltage
Input
Current Input
MCU USB
Cap. Drop
+ Buck Supply
Is
o
la
tio
n
CS5490
CRD5490-Z
RX
RESET
TX
Figure 1. System Block Diagram