Hexin Technology HXJZ-873 2000m-3000m Low Power RS-232/RS-485/TTL to RF Wireless Module - Manual (Page 4)

HXJZ-873 Mini Power Wireless Module User’s Manual
(Remarks: Jack space between is 2.0 mm.)
Definition of connecting pins and connection method:
Item no PIN Description Level
Connected
to the terminal
User terminal Remarks
1 SLE Sleep control (input) end Low level to sleep, High
level awake
2 TXD/ A (RS-485) Serial data transmitting end RXD/ A (RS-485)
3 RXD/ B (RS-485) Serial data receiving end TXD/ B (RS-485)
4 GND Power supply/Ground DGND/AGND
5 VCC +5± 0.5V +5± 0.5V TTL 3V user’s choose
6 I
2
NO. 2 on-off input user terminal on-off output
7 I
1
NO. 1 on-off input user terminal on-off output
8 O
2
NO. 2 on-off output user terminal on-off input
9 O
1
NO. 1 on-off output user terminal on-off input
User’s equipment
+5v regulator n. power supply
transmitter-receiver
Remarks:
To avoid to connect the interface reverse and can not communicate, please check and assure the voltage of 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
HXJZ-873 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 its own grounding, but it must be absolutely separated from the municipal
electric supply.
3) Application of IO control