Chengdu Ebyte Electronic Technology Co., Ltd.
EBT3002 User Manual
Copyright ©2012–2023
，
Chengdu Ebyte Electronic Technology Co., Ltd.
43
D-LED-4
Serial port 4 data transmission and reception
indication.
After power on, if no network cable is detected, it
defaults to being pulled
low. When there is data transmission and reception, a
100ms cycle is used, and a 50ms low-level output pulse
is used. When there is no data, a high-level output is
used
44
D-LED-3
Serial port 3 data transmission and reception
indication.
After power on, if no network cable is detected, it
defaults to being pulled
low. When there is data transmission and reception, a
100ms cycle is used, and a 50ms low-level output pulse
is used. When there is no data, a high-level output is
used
45
D-LED-2
Serial port 2 data transmission and reception
indication.
When no network cable is detected after power on, it
defaults to being pulled
low. When there is data transmission and reception, a
100ms cycle is used, and a 50ms low-level output pulse
is used. When there is no data, a high-level output is
used
46
D-LED-1
Serial port 1 data transmission and reception
indication.
After power on, if no network cable is detected, it
defaults to being pulled
low. When there is data transmission and reception, a
100ms cycle is used, and a 500ms low-level output pulse
is used. When there is no data, a high-level output is
used
47
TXD3
Serial port 3 sending pin
48
RXD3
Serial port 3 receiving pin
49
VSS_ one
Grounding
50
VIO_ one
External 3.3V
51
485-EN-4
Serial port 4 sends instructions (can be used as a 485
send enable pin), pulling up during transmission and
pulling down during idle time
52
485-EN-3
Serial port 3 sends instructions (can be used as a 485
send enable pin), pulling up during transmission and
pulling down during idle time
