NetAXS™ NX4L1 Installation Guide
Installation
NetAXS™ NX4L1 Access Control Unit Installation Guide, Document 7-901099V3 33
Figure 11: RS-232 Configuration
RS-485 Communications
The NetAXS panel can reside on an existing RS-485 drop line hosted by either a
NetAXS panel configured as a Gateway, or N-485-PCI-2, PCI-3, or N-485-HUB-2
(see Figure 12, Figure 13, and Figure 24). The interface allows the wiring of a
multidrop communication network of up to 4,000 feet (1200 m) in length. Only one
host converter device per drop line is supported.
Note: On a multidrop line, the Gateway panel and the PCI unit can have either
end-point or interior positions. See Figure 20 on page 44 and Figure 21 on page 45.
DIP switch position 6 on the NetAXS panel selects whether the panel is a Gateway or
Multidrop panel. The switch in the OFF position configures the panel as a Multidrop
panel; ON configures a Gateway. The panel must be power cycled for a new switch
setting to be recognized. DIP switch positions 1-5 are used to select the panel’s
address on the network. Refer to Table 5 for DIP switch setting information.
Connectors J36 and J37 are provided for supplying biasing and end-of-line
termination for the RS-485 network. The board ships with all jumpers open. For a
multidrop RS-485 line, you must close both J36 and J37 (terminated and biased) at the
two end-point panels. At all other panels, leave J36 and J37 open. Both jumpers on a
given panel must set the same. Note that biasing and termination on both ends are
present. Use the jumpers on both ends of the RS-485 network.
Note: If an RS-485 network has a NetAXS Gateway panel, no N1000-II, N1000-III, or
N1000-IV are allowed on the same network. If they are added to a network with a
NetAXS Gateway panel, they will not be able to communicate with the host computer.
NetAXS
Panel
NetAXS
Panel
Reader 1
Reader 4
Reader 1
Reader 4
COM1
COM2
CBL50
One NetAXS panel per COM port. Two COM ports possible.
Terminal
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