GSM/GPRS/3G/4G/NB-IoTSensor To Cloud IoT SeriesPage 8 of 37 King Pigeon Hi-Tech. Co., Ltd Ver 1.16. Device DescriptionMetal shell panel label Waterproof shell panel label6.1. Indicator Light InstructionsIndicator instructionsSignal indicator light: flicker when just turned on, registration signal is long bright,registration failure or no signal continues to blink.I/O indicator light:Blink when alarm of DIN digital input, AIN analog input, DS18B20 temperature input,AM2301 temperature & humidity input, etc. Was triggered (Buzzersfollow) ,extinguished when recovery;On when DO digital output type closed , Off when DO open;Blink when RS485 is transmitting data.6.2. Wiring instructionsMetal shell labels Waterproof shell label Wiring instructions7~24 VDC IN + Red line DC7~24V positive entry- Black line DC7~24V negative entryI/O wiring(Different I/O typesneed to distinguishwiring)1 Green line negative line of DO negative line of DIN negative line of AIN (4~20mA or 0~5V) GND line of DS18B20 GND line of AM2301 GND line of RS485(optional)