User Manual
GPRS Solutions for Serial Connections
Copyright
©
2013 SHENZHEN ATC TECHNOLOGY CO., LTD.
7
3.3
Configuration
3.3.1
Serial port settings
Settings on the
“
DTU COM Configuration
”
frame are the parameters related to serial port.
3.3.2
IO settings
Settings on the
“
IO Setting
”
frame are the parameters related to IO port.
There are two digital outputs and every port with a relay. And the output IO can output TTL signal directly.
The input IO can receive a high level and give an alarm signal to data center. The range voltage of the high level
is 3~12V,the current should less then 30ma.
Noted: For the output only the high level is allowed. And only high alarm is allowed for input.
3.3.3
Work mode
DTU Work Mode:
Always-on
----
the DTU will always on line
Awaken
---- if there isn
’
t data transmit in 5 minutes, DTU will cutoff connect until have a
message of phone call to awake.
