Refer to the
MS/TP Communications Bus Technical
Bulletin (LIT-12011034)
for more information on
controller device addresses and how to set them on
MS/TP buses.
Table 6: SA/FC Bus Device Address Descriptions
Use on Description
Device
Address
Reserved for FC Bus Supervisory Controller
(not for use on controllers).
0
(Switch
128 Off)
Reserved for peripheral devices (not for use
on controllers).
1 to 3
(Switch
128 Off)
Used for MS/TP master devices (controllers)
that are hardwired to an SA bus or FC bus.
4 to 127
(Switch
128 Off)
Setting the N2 Controller Address to
be Greater than 127
N2-configured controllers support the full range of
possible N2 device addresses provided by the N2 protocol
standard (1-255). However, these controllers require
special configuration for addresses above 127.
Use the following instructions for controllers greater than
127.
Note:
Before you perform this procedure, make sure
that your controller has been converted from
BACnet to N2 protocol first.
Note:
This special configuration is required because
controller addresses above 127 were originally
intended for use with the Wireless Field Bus
system.
1.
Disconnect the 24 VAC supply from the controller.
2.
Remove the FC Bus connector from the controller.
3.
Set the address switch set to the desired N2 address.
4.
Set the address switch segment labeled 128 to OFF.
5.
Reconnect the 24 VAC supply to the controller.
6.
Using an SA bus connection, download the firmware
and controller application file. The download process
asks to confirm switching the communication protocol
to N2.
7.
Click OK.
8.
After the download is finished, disconnect the 24
VAC supply to the controller.
9.
Set the address switch segment labeled 128 to ON.
10. Reattach the FC Bus connector to the controller.
11. Reconnect the 24 VAC supply to the controller.
Removing the Controller Cover
Important:
Electrostatic discharge can damage
controller components. Use proper
electrostatic discharge precautions during
installation, setup, and servicing to avoid
damaging the controller.
Important:
Disconnect all power sources to the
controller before removing cover and
changing the position of any jumper or the
EOL switch on the controller. Failure to
disconnect power before changing a jumper
or EOL switch position can result in damage
to the controller and void any warranties.
The controller cover is held in place by four plastic latches
that extend from the base and snap into slots on the
inside of the housing cover.
To remove the controller cover:
1. Place your fingertips under the two cover lift tabs on
the sides of the housing cover and gently pry the top
of the cover away from the base to release the cover
from the two upper latches.
2. Pivot the top of the cover further to release it from the
lower two latches.
3. Replace the cover by placing it squarely over the
base, and then gently and evenly push the cover on
to the latches until they snap into the latched position.
Figure 10: FAC26 with Cover Removed Showing EOL
Switch and Jumper Positions
20
FAC2611-0U Advanced Application Field Equipment Controller Installation Instructions