98 MPA2C3 Installation Guide
The interface bus is wired to the access panel by using standard CAT 6E/7 (S)/
FTP/UTP cable with RJ45 plug (J16) on the panel. The interface bus has a fixed
baud rate and communicates to the downstream I/O devices using a polling tech-
nique.
Each downstream I/O device needs to have a unique address for proper communi-
cation. 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 NX4IN
and NX4OUT downstream devices.
Table 3-11 Downstream I/O Devices DIP Switch and Jumper Settings
Module Setting Value
NX4IN DIP switches 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
Jumper settings JP1 – ON, positions 1 and 2 (if the
module is the last module on the
downstream bus),
OFF positions 2 and 3 (if the module is
not the last module on the
downstream bus)
JP2 – any setting
JP3 – any setting
JP4 – NORMAL
(Positions 1 and 2)
NX4OUT DIP switches Address (switches 1-6) – 3 through 6
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