Hexin Technology HXJZ-875 2km-10km Low Power RS-232/RS-485/TTL to RF Wireless Module - Manual (Page 4)

HXJZ-875 Low Power Wireless Module User’s Manual
1 SLE Sleep control (input) end -------------------
Low level to sleep, High
level awake (can be
space)
2 TXD TTL/RS232: data transmitting User’s PC receive
3 RXD TTL/RS232: data receiving User’s PC transmite
4 ------- ------------------------- --------------------------------- ------------------
5 GND Connect to the ground Connect to the ground
6 A RS-485/A
7 B RS-485/B
8 / 9 -----------
2
-------------------- ---------------
1 GND GND GND
2 +5V Power+ Power+
The connection of TTL, RS-232:
The connection of RS-485:
Remarks:
To avoid connecting the interface reverse and cannot communicate, please check and assure
the voltage between 2 and 3 pin is existing by using Multimeter. If there is one pin that has the voltage,
another has not voltage, which means the interface is connected reverse, please change the connection
wires between pin 2 and 3.
2) Power supply
a. The transmission power is 2W when the red blink, and 1W when the green LED blink.
b. HXJZ-875 uses DC power supply with voltage of +5V.
It can also share power supply with other equipment, however, the high quality
power supply with desirable ripple factor should be selected. In addition, the reliable grounding must be
used if there is other device in the system equipment. In case of failure to connect with the earth, it can form