Zigbee Telemetry System Features Models: Concentrator and Remote Nodes. Suitable for industrial environments. Communication IEEE 802.15.4 in 2.4GHz. Mesh Network between devices. Digital Inputs and Outputs. Analog Inputs of 0-10V and 4-20mA. Serial Port RS232/485 for Modbus slaves. Port USB for Modbus slaves and configuration. Access to I/O and Serial Port in Modbus.