Hexin Technology HXJZ-871 800m-1200m Micro Power RS-232/RS-485/TTL to RF Wireless Module - Manual (Page 4)

HXJZ-871 Mini Power Wireless Module User’s Manual
Remarks: The space between each pin is 2.0 mm.
2. HXJZ-871 interface definition
HXJZ-871 can supply one 5-pin connector (JP1), and its definitions as well as connection method
for terminals are shown in Table 1.
Table 1: Definition of connecting pins and connection method
Item no PIN Description Level
Connected to the
terminal
User terminal Remarks
1 VCC +5±0.5V +5±0.5V TTL 3V user’s choose
2 GND Power
supply/Ground
DGND/AGND RS232 interface: GND of
Power
and Data must be united.
3 RXD/ B (RS-485) Serial data receiving
end
TXD/ B (RS-485)
4 TXD/ A (RS-485) Serial data
transmitting end
RXD/ A (RS-485)
5 SLE Sleep control
(input)
end
High level to sleep, Low
level awake(sleep version is
aviavailability)
Note: No sleeping is default, The Pin 5 of no-sleeping version is not be used, pin 5 must be hung.
User’s equipment
+5v regulator n.
power supply
transmitter-receiver
Remarks: To avoid connecting the interface reversely and can not communicate, please check and assure
the voltage of 3 and 4 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 reversely, pls. Change the connection wires between pin 3
and 4.