The Current Sensor is designed to work with the BMS123 Smart only if the supplied 100A current sensor in the complete set is not enought.
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The BMS123 Smart is the latest innovative solution for the lithium cell and battery pack monitoring and management. The BMS123 Smart brings to you the complete system for charging and balancing or LiFePO4/LiFeYPO4 cells and batteries.
The wires are connected by follow:
1. RED: +5V Power 2. YELLOW: Unconnected 3. BLUE: Current signal 4. BLACK: GND
Simple installation, easy settings, easy and reliable operation.
Concerning the GWL/Power BMS123 Smart system please study all available details here: http://gwl-power.tumblr.com/tagged/BMS123Smart
GWL/Power BMS123 Smart solution uses the GWL/GreenEye Technology for Smart Monitoring over the Bluetooth Battery communication protocol.