Chengdu Ebyte Electronic Technology Co., Ltd
E180-DTU(ZG120-485) Usermanual
Copyright ©2012–2019,
C
hengdu Ebyte Electronic Technology Co.,Ltd
5
2.1 Pin definition
No.
Item
Function
Description
1
VCC
Crimped power connector,
positive
DC 8 ~ 28V, 12V or 24V is recommended
2
GND
Crimped power connector,
negative
The negative of the power supply is connected to the
system ground and the case
3
AGND
Public ground interface
It can be connected to external grounding terminal or not
handled
4
RS485-B
Serial terminal
Output, connected to port B of other RS485 device
5
RS485-A
Serial terminal
Input, connected to port A of other RS485 device
6
PWR-LED
Power Indicator
Red, always on when power is on
7
TXD-LED
Send indicator
Yellow, blinking when sending data
8
RXD-LED
Receive indicator
Yellow, blinking when receiving data
9
LINK-LED
Connection indicator
Red, always on when connected to the network, off when
not connected
10
RUN-LED
Device working status
indicator
Red, the device is busy when the light is off, and the
device is idle when the light is on
11
Baud rate reset
switch
Tact Switch
Long press for more than 1s to reset the baud rate
(115200)
12
Antenna interface
SMA-K interface
Externally threaded female hole, 10mm long,
characteristic impedance 50
Ω
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