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Communications
6.3
Modem Network Connection
Access control panels can be controlled by using MD-N33 modems, one
on the PC side and the others on each panel Network at the remote
locations. The modem is assigned from within the AS-525 software.
Use a modem when the access control panel is too far from the computer
to use a serial connection and an alternative RS485 network or TCP/IP
network is unavailable.
The following diagram illustrates remote site modem configuration with
AC-525.
MD-N33
Modem/RS232
Figure 21: Remote Site Modem Configuration
Note:
For more information on modem connections, refer to the
MD-N33 User Manual.
Converter
MD-N33
Modem/RS232
RS232
Converter
Telephone
Line
Converter
RS232
RS485
Access
Control Panel
MD-14 RS232/RS485
AC-525 Hardware Installation and User Guide
Page 36