Communications
AC-425 Hardware Installation and User Manual 35
6. Communications
Communication lines are used to upload and download information between
the AC-425 panel and the AxTraxNG server. When the access control panel
and the computer are communicating, the system’s two LEDs flash
accordingly.
The RX LED flashes when the controller receives data
The TX LED flashes when the controller transmits data
There are three connection modes:
Serial Network with RS-232
Serial Network with RS-485
TCP/IP Network (AC-425IP model only)
6.1 Serial Network Connection
The computer serial port controlling the access control panel is set from within
the AxTraxNG server. The default baud rate is 9600 bps for direct connection
to the computer.
When using an RS-232 connector, only one AC-425 panel can be linked to
each communication port on the computer. Use an RS-485 if you wish to
connect more than one panel on one communication port.
The J1 switch must be set to the correct position to select the RS-232
communication.
6.1.1 RS-232 Connection to the Computer
Set the J1 switch to the RS-232 position.
Table 4: RS-232 Connection
Access Control Panel DB9 Connector DB25 Connector
GND Pin 5 Pin 7
Tx Pin 2 Pin 3
Rx Pin 3 Pin 2
The RS-232 connects the computer to only a single AC-425 panel.
The distance between the computer and the AC-425 panel must be no more
than 150 feet (50 meters).
If the baud rate is increased to 57600 or beyond, the distance must be no more
than 30 feet (10 meters).
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