The PowerLogic PM5661 is a universal measuring device for front panel mounting (96 mm x 96 mm) with a fully graphical and backlit LCD display and features an additional MID certification. The measuring device offers an accuracy class of 0.2s according to the IEC 62053-22 standard and 128 samples per cycle. It measures energy, active and reactive power, voltage, current, frequency, power factor, and up to the 63rd harmonic. With 4-quadrant energy measurement. It has 1.1 MegaBytes of memory for up to 14 selectable parameters with configurable intervals and durations. This measuring device also includes direct monitoring of the neutral conductor and differential current monitoring with fault current calculation. It operates in a 50Hz or 60Hz network and accepts a supply voltage of 100 to 480 VAC and 125 to 250 VDC. The rated current is 1 A or 5 A and supports configurations with one phase and neutral, three phases, or three phases and neutral. The measurement voltage range between phases is 20 to 690 VAC at 45 to 65 Hz. The measurement range between phase and neutral is 20 to 400 VAC at 45 to 65 Hz. Communication protocols include Modbus RTU and ASCII 2 wires with RS485 interface, as well as Modbus TCP/IP, Ethernet/IP, and BACnet/IP based on 10/100 Mbit/s, Daisy Chain Ethernet with RJ45 connector support. The integrated communication features allow support for the DNP 3.0 protocol, access to an integrated web server, and a serial to Ethernet gateway. The device also has 2 digital inputs with pulse support, 2 RCM inputs, and 2 digital outputs. There are 52 configurable alarms, and it supports 8 tariffs. The product dimensions are as follows: width 96 millimeters, depth 77 millimeters, height 96 millimeters, and product weight 450 g.