Johnson Controls FEU2610 Series, Installation Instructions Manual

Page: 7 / 15

FEU2610 Field Equipment Controller Installation Instructions
7
FC Bus Port
The FC Bus port on the front of the FEU is an RJ-12, 6-position modular jack. The FC Bus port is not used in the
MS-FEx26x0-0U Field Equipment Controller.
Sensor Port
The Sensor (SA Bus) port on the bottom of the FEU (
Figure 1
) is an RJ-12, 6-position modular jack that provides a
connection for the VAV Balancing Tool, specified network sensors, or other SA Bus devices with RJ-12 plugs.
The Sensor port is connected internally to the SA Bus terminal block. See
Table 2
for more information. The Sensor
Port pin assignment is shown in
Figure 8
.
Device Address DIP Switches
Ensure the device address DIP switches are set to the appropriate address (in the range of 4-127). Be sure that
DIP switch 128 is set to Off. For more details on setting the DIP switches, see
Setting the FC Bus Address
.
Power Wiring
To wire the FEU26 for power, connect the 24 VAC supply power wires from the transformer to the removable 3-
terminal plug as shown in
Figure 8
. The middle terminal is not used.
Note: Connect 24 VAC power to all network devices so transformer phasing is uniform across the devices.
Powering devices with uniform 24 VAC supply power phasing reduces noise, interference, and ground loop
problems. The FEU does not require an earth ground connection.
Figure 7: FC Bus Terminal Block Wiring
Figure 8: 24 VAC Supply Power Terminal Block Wiring
FEC
Supply Power
Terminal Block
FEC
Supply Power
Terminal Block
Plug
Wires from
Johnson Controls
24 VAC, Class 2
Power Transformer
Brown Wire
(COM)
Orange Wire
(24 VAC)
F
IG
:FE
C
_
Pw
er
_
P
rt
24V~
CO
M
HO
T