LG V-net PQDSBCDVM0 Installation Manual page 10

Setting and using method
I When using ODU Dry contact with Central Control Devices
(Slave Mode)
Notes
This dry contact module is available after MultiV3 series.
10 Dry contact for demand control
Central
Control
Devices
CN_OUT
TTL
WIRE ASSY 1(1EA)
BUS_A
BUS_B
Multi-V