Quatech SS-BLT-400 operation manual LED Indicators SYS Red：, Pair Green：, RX Red：, TX Green：

LED Indicators

SYS (Red)：

It is the power indicator, when the power is on then the LED will blink once per second.

Pair (Green)：

Before connecting to synchronize between the device and the “BT RS232

Config Tool” software, the green LED will be blinking

After connecting to synchronize between the device and the “BT RS232

Config Tool” software, the green LED (Pair) will be on

RX (Red)：

Data received indicator (When data are received from the network, the LED will be on.)

TX (Green)：

Data sent indicator (When data are sent out to the network, the LED will be on.)

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