PLC CCO01A
User Manual
2 Overview
Issue 02 (2016-01-10)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
7
Figure 2-4
Circuit diagram
The working principles of the PLC CCO are as follows:
Uses the high/low voltage isolation coupled circuit to isolate low-frequency three-phase
AC power from board low voltages, thereby ensuring board safety. In addition, the PLC
CCO provides the high-frequency circuit for injecting and extracting PLC signals.
Filters and processes PLC signals over the receive link. The signals are extracted from
the AC power cable.
Amplifies the power of PLC signals and injects the PLC signals into the AC power cable
over the transmit link.
Converts between PLC and RS485 signals through the PLC controller.
Provides the channel for sending and receiving RS485 signals over the RS485
transmit/receive interface circuit to communicate with the data collector.
