Q-See QX628 Technical Manual
1
1. Necessary to know
1.1 Communication connection
illustration
illustration
1.1.1 RS232 Communication
RS232 communication connect with on more than 50 metre length
shielding twisted-pair.
This RS232 communication only use three signal line, the both
ending use a BD 9-pin port connector, make sure the connector pin -1
connect another connector pin -1,the connection wire and definition
signal illustration with following:
connect another connector pin -1,the connection wire and definition
signal illustration with following:
Attendance device terminal
Pin-number signal definition Pin-number signaldefinition
2 TXD---------------------------------2 RXD
3 RXD-------------------------------- 3 TXD
5 GND---------------------------------5 GND
3 RXD-------------------------------- 3 TXD
5 GND---------------------------------5 GND
1.1.2 RS485 Communication
Use shielding twisted-pair, RS485 communication standrad
connection length are no more than1.2Km.
RS485 connection illustrate with following picture,
1 5
6 9
1 5
6 9