finder 7M Series - Basic Description and Operation; Description of the Device

7M User’s Manual 5
1. BASIC DESCRIPTION AND OPERATION
1.1 Description of the device
The single-phase energy meters 7M.24 are intended for energy measurements in single-phase electrical power networks
and can be used in residential, industrial and utility applications. Meters measure energy directly in 2-wire networks
according to the principle of fast sampling of voltage and current signals. They are equipped with a capacitive touch
button that allows the user to scroll measurements and the menu, make settings,… and backlight for better visibility. A
built-in microprocessor calculates active/reactive/apparent power and energy, current, voltage, frequency, power factor,
power angle and frequency from the measured signals. This smart meter can also perform basic harmonic analysis (THDU,
THDI). This enables a quick overview of harmonic distortion either coming from a network or generated by the load.
The microprocessor also controls LCD, LED, IR communication and optional extensions.
Connecting terminals can be sealed up against non-authorised access with protection covers. They are built to be fastened
according to EN 60715 standard.
1.1.1 Appearance
Figure 1: Appearance of single-phase electric energy meter 7M.24
1 Current terminals – to load
2 Information display
3 IR communication port –on side
4 DIN-Rail tting
5 Cap touch
6 LED indicator
7 Current terminal – source
8 NFC
9 AUX terminals (options)*:
• RS485
• M-Bus
• S0+/–
*vedi immagini 4, 5, 6
LCD Number of digits: 7
Height of digits: 5.5 mm
LED Colour: red
Pulse rate: 1000 imp/Wh or 1 imp/varh
LED on: no load indication