2.1 Preparation for Installation
• Assembly and related connections of the product must be implemented by authorized persons in
accordance with the instructions of the user manual. The device should not be operated without making
the correct connections.
• Before connecting the device to the mains, make sure that the power is cut off.
• Use a dry cloth to clean and dust the device. Do not use alcohol, thinner or any abrasive material.
• The device should only be commissioned after all connections have been made.
• Do not open or dismantle the cover of the device. There are no user-serviceable parts inside.
• The device should be kept away from humid, wet, vibrating and dusty environments.

2.3.1 Products with Direct Connection
Lin: t is the terminal where the phase input of the device is connected.
Lout: Phase entering from “Lin” terminal exits from “Lout” terminal. From here it must be connected to the
load.
N: It is the terminal where the neutral connection of the line is connected.
2.3.2 Products with Transformer Connection
L input: Phase input of the AC voltage being measured.
N output: Neutral input of the AC voltage being measured.
k: Input connection of the AC current being measured.
l: Output connection of AC current being measured.
2.3.3 Common Connections
Pulse1 Output : It is the output terminal of the DC voltage applied to the “-“ terminal when digital
output 1. By default, the pulse 1 output gives 1000 impulses (1000 imp/kWh) for each measured kWh.
Pulse duration is 100 ms.
Pulse2 Output : t is the output terminal of the DC voltage applied to the “-“ terminal when digital
output 2. By default, the pulse 2 output gives 1000 impulses (1000 imp/kWh) for each measured kWh.
Pulse duration is 100 ms.
com Input: It is the terminal to which the positive end of the DC voltage to be digitally switched will be
connected (common).
d+: It is the data+ input of the RS-485 interface.
gnd: It is the input where the ground connection of the RS-485 interface is made.
d-: It is the data- input of the RS-485 interface.