Technical Manual

1. Necessary to know

1.1 Communication connection

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:

Attendance device terminal

Pin-number signal definition Pin-number signaldefinition

2 TXD---------------------------------2 RXD

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