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 (1–254). However, these controllers require
special configuration for addresses above 127.
Use the following instructions for controllers greater than
127.
Note:
This special configuration is required because
controller addresses above 127 were originally
intended for use with the Wireless Field Bus system.
Note:
Prior to performing this procedure, be sure
the controller has been converted from BACnet to
N2 protocol first. Refer to the
Modernization Guide
for Legacy N2 Controllers (LIT-12012005)
for more
information.
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 you remove the cover and change
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, complete the
following steps:
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: Cover removed showing EOL switch and jumper positions
Setting the End-of-Line (EOL) switch
Each field controller has an EOL switch, which, when set to
ON, sets the controller as a terminating device on the bus.
The default EOL switch position is OFF.
FAC3611 Advanced Application Controller Installation Guide
16
