PZEM-004T 3.0 Version TTL Modbus-RTU Power Meter Kwh Meter AC Single Phase 100A Electric Volt Amp Frequency Power Factor Meter We the software to connect it with the PC. If you to connect it with other terminal device such as PLC,SCM and so on, prepare the cable and write the by yourself. This document describes the specification of the PZEM-004T AC communication module, the module is mainly used for measuring AC voltage, current, active power, frequency, power factor and active energy, the module is without display function, the data is read through the TTL interface. PZEM-004T-100A: Measuring Range 100A (external transformer Important Notification: For this product PZEM-004T, we have the update version to replace the old version. The update information as following: 1. the new version has the same size and TTL port as 2. the software is new, we have English software as same as the PZEM-014,016, The communication protocol change to be Modbus-RTU, the display interface is changed. now it can test Voltage ,Current, Power, Power factor, Frequency and Energy 6 parameters. 3. the new version has higher precision, faster refresh speed and the more stability communication than the old version. 4. This is the module with the outcase. Brand Name: : Electrical Rated Voltage: 220V Max Operating Current: 100A - 119A Dimensions: 7.8cm * 3.7cm Power Supply: AC Model Number: PZEM-004T Output Voltage: 220V Phase: Single Phase Display Type: Digital Only Operating Temperature: -10-60degree Measuring Energy Range: 100A/22000W Accuracy Class: 1.0 Accessory: split CT Communicate Port: TTL Current range: 0-100A Voltage range: 80-260V Power range: 0-22kw Power factor: 0-1 Frequency: 45-65Hz Protocol: Modbus Color: blue + black material: plastic Package Contents: 1 * PZEM-004T AC Voltmeter Ammeter with outcase 1 * split CT Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.