Communications
AC-225x-B Series Hardware Installation and User Manual 33
The distance between the computer and the access control 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).
Table 7: RS-232 Connection
6.1.2 RS-485 Connection to the Computer
Set the J1 switch/jumper to the RS-485 position.
Using the RS-485, up to 32 access control panels can be linked together and
connected to a single communication port on the computer (Figure 18).
Figure 18: RS-485 Panel Connection to PC
Use the RS-485 interface for situations where there are multiple controllers
connected. The serial port used to control the access control panel is assigned
within the AxTraxNG software.
The AC-225x-B supports the 2-wire RS-485 interface, which can significantly
increase the distance between the server and the last panel. To use the RS-485
interface, the panels must be connected in a daisy-chain formation with an MD-
14U RS-485 to RS-232 adapter (Section 6.1.3).
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