LG BECON HVAC BACnet PQNFB17C1 Installation & User Manual page 19

The maximum quantity of connected indoor unit is different depending on the quantity of
connected I/O modules.
Please refer to following information related to product connection quantity.
Quantity of
Device
256
128
* Devices: Indoor units, ERV, DI/DOs, DOKITs, AWHPs, AHUs
• RS-485 communication cable connection
- There is a polarity in RS-485 communication cable connection, so be careful not to reverse
the connection of the two cables.
- Do not let the length of RS-485 communication cable exceed total of 1 km.
- RS-485 communication cable must be connected with BUS type.
• IP address of the ACP BACnet
- IP address of the ACP BACnet, address of Gateway, and Net mask must be requested to the
person in charge of the network of the corresponding site.
Caution
RS-485 Connection of the ERV equipment
To connect ERV equipment, it is recommended to use the ports other than RS-485
communication ports which are connected to air conditioners.
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Quantity of I/O Module
INSTALLING ACP BACnet
Quantity of I/ Quantity of
O Module Device
0 256
1 248
2 240
3 232
4 224
5 216
6 208
7 200
8 192
9 184
10 176
11 168
12 160
13 152
14 144
15 136
16 128
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