Usage Tips:Description: 35mm standard DIN rail installation, complying with standard DIN EN50022. Single pole width (Modulus 18mm), complying with standard DIN43880. Standard configuration 5+1 digits display (99999.1kWh) by step motor type impulses register. Standard configuration pulse output passive (polarity)，May select distant pulse output passive ( nonpolarity). And contact with all kind of AMR system conveniently，Complying with standard IEC 62053-31 and DIN 43864. Bicolor LED instructions power supply state (green) and signal of energy impulses (red)。 Automatic detection the direction of the flow of load current. And instructions (Only red energy impulses signal when working，If no green instructions power supply, that is meaning the direction of the flow of load current reverse). Single direction measurement single phase two wire active power consumption. It is nothing with direction of the trend of load current. Complying with standard IEC 62053-21. Directly connect and use, there are two types wiring you may select. Standard configuration type S connection, may select type U connection (Product Configuration code is US). Extension terminals cover, in order to protect to use safety. Specification: Material: Plastic Product detailed size: 117x68x18mm Load capacity of electric energy meter: 0.05Ib～Imax Ambient temperature of the place to save: -25℃～+55℃ Relative humidity does not exceed: 95% Insulation energy withstands frequency: 50Hz/60Hz Rated voltage: 110V; 120 v; 220 v Rated current: 220V 5(30)A Package Includes: 1 Piece Rail Table 1 Piece Manual Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Please kindly understand. Thank you.