Communications
AC-225x Series Hardware Installation Manual 35
At each end of the data line, both where the panel connects to the computer
and on the last panel in the network, a termination resistor of 100–120 Ω may
be required. Apply the resistor across the L1 and L2 connections.
These termination resistors are especially important in long cable runs.
6.2 TCP/IP Network Connection
The computer running the AxTraxNG software can communicate with the
access control panels via a TCP/IP network. The connection settings are
controlled within the AxTraxNG software.
AC-225IP panels connect to the TCP/IP network (LAN or WAN) directly, using
an onboard network module. When an access control panel network is
connected using RS-485, up to 32 panels can be connected on each TCP/IP
network. This means that one AC-225IP panel can support up to 31 AC-225x
panels.
To connect to a TCP/IP network using other AC-225 models, add Rosslare's
MD-N32 TCP/IP to RS-232 gateway converter.
For more information on operating an MD-N32, refer to the MD-N32 User
Manual.
6.2.1 LAN and WAN Requirements
The devices can be connected to a TCP/IP network using any valid network
address.
Use a TCP/IP connection when a LAN network already exists and the long
RS-485 network is not required. The following schematic illustrates the
connection of a single AC-225x to a computer via a LAN network.
The maximum distance from the Ethernet port of the panel to the LAN/WAN
connection is 100 m (330 ft).
When the TCP/IP connection is implemented over a Wide Area Network (WAN)
it becomes possible to connect through the Internet. This makes it possible to
control multiple access control panels worldwide, all from a single computer.
Before connecting a panel by TCP/IP connection for the first time, the
AxTraxNG software must configure the device. Settings then remain stored in
non-volatile memory on the device (see the configuring instructions in the
software manual).
Figure 21: MD-N32 Configuration Connecting a Single Panel
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