The iEM3555 energy meter is an attractive option for a three-phase energy meter designed for DIN rail mounting with an LCD display. The additional local signaling includes a green LED power-on indicator, a blinking yellow LED for accuracy testing, an overload alarm, and communication indicators. This meter can be used in billing applications and supports four tariffs. It offers the following accuracy classes: active energy: Class 0.5S according to IEC 62053-21 and ANSI C12.20. The meter measures active and reactive power, active and reactive energy, voltage, and current with four-quadrant energy measurement. Designed for 50 Hz or 60 Hz networks, the supply voltage can vary from 100 to 277 VAC or 173 to 480 VAC. The rated current flows through a Rogowski coil to be measured by this meter and supports single-phase and neutral, three-phase, as well as three-phase and neutral configurations. The communication protocol is Modbus with terminal block support. There is a programmable digital input and a programmable digital output that can be used as a pulse output. Certifications include EAC, CE, and UL. The product dimensions are as follows: width 90 mm, depth 69 mm, height 95 mm, and the product weight is 260 g. It is compatible with energy management software to leverage the benefits of digital energy supply offered by the Internet of Things (IoT).