Shenzhen Kingbird Network Technology CO.,LTD KB3050 GPRS DTU
6
2.3 User
Interface
1
．
User
Interface:
Interface as follow (From left to right):
Pin No.
Definition
Description
For User
1 VCC Power:
DC5~24V
2 GND Ground
3 UTXD
TXD
（
DTU COM/RS485: A
）
RS232,TTL:RXD; RS485:A
4 URXD
RXD
（
DTU COM/RS485: B
）
RS232,TTL:TXD; RS485:B
5
Output1
Output NO.1 of IO; User can set it as
RTS hardware flow control port
(Default: Output1)
6
Input1/RST
Input No.1 of IO; User can set it as
RST reset pin (Default: Input1)
7
UGND
Ground (COM)
RS232,TTL, RS485:Data groud
8
Output2
Output No.1 of IO; User can set it as
CTS hardware flow control port
(Default: Output2)
9
Status
Online is high,offline is low
10
SW/Input2
Input No.2 of IO; High is DTU, low is
SMS, user can set it as Input 2 of
IO(Default: SW)
Red
LED:
power
light,
will light after power-on.
Green LED: Communications light, when KB3050 connect Server OK, it will often
light green, otherwise, it will flash.
1 2 3 4 5 6 7 8 9 10
VCC GND
UTXD/A
URXD/B
Output1
Input1 UGND Output2 Status Input2
