Hexin Technology HXJZ-877 2000m-3000m Low Power RS-232/RS-485/TTL to RF Wireless Module - Manual (Page 4)

HXJZ-877 Mini Power Wireless Module User’s Manual
1）User’s interface
HXJZ-877 have one interface of TTL/RS232/RS485, user can choose one .
HXJZ-877 standard interface: when the antenna upward, th e plastic socket gap upward, from left to
right,1-9 pin in turn, as follows:
(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 use retain
7 I
1
No use retain
8 O
2
No use retain
9 O
1
No use retain