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NetAXS™ NX4L1 Installation
Installation
4.9 Jumper Settings
The NX4L1 panel control board includes jumpers 36 and 37, which set end-of-line
termination and biasing for the Multidrop RS-485 Line.
The board ships with all jumpers set to OFF. For a Multidrop RS-485 Line, you must
set both J36 and J37 to CLOSED (terminated and biased) at the two end-point panels.
At all other panels, leave J36 and J37 at OPEN. Note that both jumpers on a given
panel must either be OPEN or CLOSED.
4.10 Downstream I/O
UL has not evaluated the compatibility of downstream I/O devices with the
Note:
NetAXS panel.
In some applications, the number of system inputs or outputs exceeds the number that
is standard on the NetAXS™ panel. The solution is to add a combination of
MIRO-2/16 and MIRO-32/0 modules external to the NetAXS™ enclosure on a
dedicated RS-485 Downstream Input/Output (I/O) bus. A maximum of two
MIRO-32/0 and a maximum of four MIRO-2/16 for a total of six MIRO modules can
be added to the downstream bus.
A MIRO-32/0 module has 32 supervised, four-state inputs that are limited to 2,200
ohms resistance. The MIRO-2/16 has two supervised inputs and 16 SPDT relay
outputs; each input is limited to 2,200 ohms resistance. Refer to the individual
installation manuals for I/O wiring details.
The downstream I/O bus is wired into the NetAXS™ TB10 terminal block. The
downstream bus has a fixed baud rate and communicates to the MIRO modules using
a polling technique.
Each MIRO module needs to have a unique address for proper communication. Each
one also has some configuration jumpers that need to be positioned correctly.
The following table lists the DIP switch and jumper settings for the MIRO 32/0 and
2/16 modules.
Table 6 MIRO 32/0 DIP Switch and Jumper Settings
Module
MIRO 32/0
28
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Setting
DIP switches
Value
Address (switches 1-6) - 1 or 2
Baud rate (switches 7 and 8) - 7
= OFF, 8 = ON
OP Mode (switches 9 and 10) - 9
= OFF, 10 = OFF
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