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Chengdu Ebyte Electronic Technology Co.,Ltd.
User Manual
Copyright ©2012–2020
,
Chengdu Ebyte Electronic Technology Co.,Ltd.
8
Definitions
1
PE
Protective earth
terminal
Lightning protection grounding. If the ground lead is good, it is
recommended to connect the product case to the ground; vice versa.
2
+
Positive power
supply
The power input is positive, and the DC voltage input range is DC
8-28V.
3
-
Power ground
Power input negative (0V).
4
B/RX
Communication
interface B/RXD
RS485 interface B/(RS232_RXD).
5
A/TX
Communication
interface A/TXD
RS485 interface A/(RS232_TXD).
6
G
Communication
port
RS485 ground (can not be connected)/RS232 signal ground (0V).
7
Second
communication
interface
Antenna
port/network port
433Mhz antenna port/network port socket
8
DI1
Switch value
acquisition channel
1
Switch signal acquisition channel 1. With GND: dry contact input is
closed and valid; wet contact is less than 0.7V valid.
9
GND
Input negative
Input negative (0V).
10
DI2
Switch value
acquisition channel
2
Switch signal acquisition channel 2. With GND: dry contact input is
closed and valid; wet contact is less than 0.7V valid.
11
GND
Input negative
Input negative (0V).
12
DI3
Switch value
acquisition channel
3
Switch signal acquisition channel 3. With GND: dry contact input is
closed and valid; wet contact is less than 0.7V valid.
13
GND
Input negative
Input negative (0V).
14
DI4
Switch value
acquisition channel
4
Switch signal acquisition channel 4. With GND: dry contact input is
closed and valid; wet contact is less than 0.7V valid.
15
GND
Input negative
Input negative (0V).
16
None
Leave it in the air, do not connect.
17
SFR
Reset
Press and hold for 3 seconds to restore the factory settings (Set
Factory Reset) (indicated by the status of the RUN light).
18
SIM
SIM card slot
Insert a data IoT card or a phone card with a sufficient data plan.
(This product has no SIM card slot)
(2) Description of the product interface at the receiving (output) end.