Honeywell NX4L1 Installation Guide - Page 32

NetAXS™ NX4L1 Installation Installation Figure 11: RS-232 Configuration Terminal COM1 CBL50 NetAXS Panel COM2 NetAXS Panel One NetAXS panel per COM port. Two COM ports possible. Reader 1 Reader 4 Reader 1 Reader 4 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 dropline 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 33 and Figure 21 on page 34. 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. 22 www.honeywell.com