Operation Guide

2 Interface and Component
2.1 Interface of Serial Port Data Cable
The interface of serial port data cable uses the asynchronous serial
communication RS232 standard.
Figure 2 Diagram of eRadio Data Interface
Table 33 eRadio Data Interface Definition
Pin Name Description Remarks
1 VCC Power output DC9-16V
2 GND1 Power Ground
3 RXD
Serial port data
receiving
RS232 Level
4 GND2 Signal Ground
5 TXD
Serial port data
transmitting
RS232 Level
2.2 Radio Frequency Interface
The eRadio radio frequency interface uses 50 OHM TNC negative connector.
2.3 Instruction of Indicator Lights
 3G/4G/BT is 3G/4G and Bluetooth red and green indicator light, red
indicator light represents 3G/4G module and green one represents
Bluetooth module;
 RX/TX is data transmitting-receiving red and green indicator light, green
indicator light represents data receiving, red indicator light represents data
transmitting;
 PWR/ALM is bi-color indicator light for normal power supply and
under-voltage, green indicator light represents normal power supply, red
indicator light represents abnormal voltage;