FX15 Controller Technical Bulletin
Connection Details for I/O Expansion (XT-XP Modules) on Local
Extension Bus
Figure 12: Connection Details for the XT/XP Modules
Consider the following information when working with the connection
details for the XT/XP Modules:
• maximum XT modules: four XT91D00s
• maximum bus length: 1,200 m (4,000 ft)
• Install a repeater (for example, RP-9100-810x) to regenerate the
RS-485 signal if more than 31 N2 devices are connected on the
same N2 bus trunk and/or the N2 bus trunk length is more than
1,200 m (4,000 ft).
• Install 220 ohm end-of-line resistors at each end of the XT-Bus line
when the bus length is greater than 100 m (330 ft). When the bus
length is less than 100 m (330 ft), insert only one 220-ohm resistor
at the FX15 controller end only.
Connection Details for the N2 Open Card
The FX15 controller comes with the N2 Open card either installed or
not installed. If the N2 Open card is not installed, you can install the N2
Open card at a later time in the field. For details, see Ordering Codes.
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