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Note: To do this, set the highest number switch that is less than or equal to the intended
device address to ON. Then continue setting lower numbered switches until the total
equals the intended address. For example, if the intended device address is 21, set
switches 16, 4, and 1 to ON (16+4+1= 21) and all other switches to OFF.
Set switch 128 to ON only for expansion module on a ZFR/ZFR Pro Series Wireless Field Bus
3.
application. For all hard-wired SA and FC bus applications, ensure that switch 128 is set to OFF.
Note: Do not connect an expansion module with switch 128 set to ON to an active (hard-
wired) SA or FC bus. When an expansion module with switch 128 set to ON and a device
address from 4 to 127 is connected to a wired field bus, the entire field bus is rendered
inoperable until the expansion module is disconnected or switch 128 is set to OFF.
Refer to the WNC1800/ZFR182x Pro Series Wireless Field Bus System Technical Bulletin
(LIT-12012356) or the FX-ZFR Series Wireless Field Bus System Technical Bulletin (LIT-12011660) for
more information on device addresses in wireless applications.
4.
Set a unique and sequential device address for each of the expansion modules connected on
the SA or FC bus starting with device address 4.
Note: To ensure the best bus performance, set sequential device addresses with no gaps
in the device address range (4, 5, 6, 7, 8, 9, and so on). The expansion modules do not
need to be physically connected on the bus in their numerical device address order
5.
Write each expansion module's device address on the white label below the DIP switch block
on the expansion module's cover.
Table 7: SA/FC bus device address descriptions
Device address
Use on description
0
Reserved for FC Bus Supervisory Controller (not for use on controllers).
(Switch 128 Off)
1 to 3
Reserved for peripheral devices (not for use on controllers).
(Switch 128 Off)
4 to 127
Used for MS/TP master devices (controllers) that are hardwired to an SA bus or
FC bus.
(Switch 128 Off)
0 to 3
Reserved addresses for wired subordinate devices (not for use on controllers).
(Switch 128 ON)
4 to 127
Valid for MS/TP Master controllers on wireless FC Buses only.
(Switch 128 ON)
20
FX-PCX2721 Expansion Input/Output Module Installation Instructions
Note: Controllers ship with switch 128 ON and the remaining address
switches off rendering the controllers wired subordinate devices, which
do not operate on MS/TP buses.
Note: Do not connect a controller with switch 128 ON to an active (hard-
wired) SA or FC bus. When a controller with switch 128 ON and a device
address from 4 to 127 is connected to a wired field bus, the entire field
bus is rendered inoperable until the controller is disconnected or switch
128 is set to Off.
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