LG PDI Premium PQNUD1S40 Installation & Owner's Manual page 17

When connected to RS-485 type wattmeter
• Interlock function with RS-485 type wattmeter is available only for EHP products.
CAUTION
!
• The color and polarity of the signal wire may be different from the details indicated on the
case depending on the manufacturer of wattmeter. [Black: (-), white: (+)]
• When connecting the 485 communication cable, make sure to check the A, B polarity.
• After connecting the wattmeter, check whether the signal is connected through the LED.
• Power indicator and Pulse Type wattmeter must be installed in same panel.
POWER
PQNUD1S40
CAUTION
1. Please read the manual carefully, before using the product.
2. The installation requires expert skills, and it should be installed by the
service or other shops specialized in the installation and recognized by
our company.
3. For all the problems arising after installation by someone who has no
relevant qualifications, our company will not provide free service
Central
control
INSTALLATION METHOD
WHM
MENU
SELECT
ODU WHM CHECK
485-type
Remote
wattmeter
reading
17