LG PQNFB17C1 Installation & Owner's Manual page 30

INSTALLING ACP BACnet
20
Connecting Ethernet cable (LAN cable) to the ACP BACnet
After connecting the ACP BACnet and RS-485 cable, Ethernet cable shall be connected to the ACP BACnet.
ACP BACnet may be connected to hub through Ethernet cable, or directly to AC Manager (AC
Manager IV on version 4.0.0 or later).
Connecting the ACP BACnet and hub
It is the case of connecting the ACP BACnet to the basic internet network installed at the site, and it
is generally connected to the hub.
In such case, Ethernet cable shall be connected as a direct cable.
Use Ethernet cable (direct cable) to connect to LAN port of the ACP BACnet.
Connecting ACP BACnet and PC
It is the case of installing AC Manager (AC Manager IV on version 4.0.0 or later) in a separate PC and
connecting ACP BACnet and PC directly.
In such case, Ethernet cable shall be connected as a cross cable.
Use Ethernet cable (cross cable) to connect to LAN port of the ACP BACnet.
Caution
Ethernet cable types
You must distinguish if the Ethernet cable to connect is a direct cable or a cross cable.
Also, connect after checking the existence of problem in the cable using LAN tester.
Connection with
hub
Direct cable
Direct connection
with PC
Cross cable