
Table 5: Communications Bus and Supply Power Terminal Blocks, Functions, Ratings, Requirements, and
Cables
Recommended Cable Type
Function, Electrical Ratings/Requirements
Terminal
Labels
Terminal
Block/Port
Label
0.6 mm (22 AWG) stranded, 3-wire
twisted, shielded cable
recommended
FC Bus Communications
+
-
FC BUS
1
Signal Reference (Common) for Bus communications
COM
Isolated terminal (optional shield drain connection)
SHLD
or
SHD
Wireless Commissioning Converter
retractable cable or 24 AWG 3-pair
CAT 3 Cable <30.5 m (100 ft)
RJ-12 6-Position Modular Connector provides:
FC Bus Communications
FC Bus Signal Reference and 15 VDC Common
15 VDC, 180 mA, Power for Wireless Commissioning
Converter or ZFR or ZFR Pro Wireless Router
FC Bus
FC BUS
1
(Port)
0.6 mm (22 AWG) stranded, 4-wire
(2 twisted-pairs), shielded cable
recommended.
Note:
The + and - wire are one
twisted pair, and the COM and SA
PWR are the second twisted pair of
wires.
SA Bus Communications
+
-
SA BUS
1
SA Bus Signal Reference and 15 VDC Common
COM
15 VDC Supply Power for Devices on the SA Bus
(Maximum total current draw for SA Bus is 240 mA.)
SA PWR
24 AWG 3-pair CAT3 cable <30.5
m (100 ft)
RJ-12 6-Position Modular Connector provides:
SA Bus Communications
SA Bus Signal Reference and 15 VDC Common
15 VDC Power for devices on the SA bus and Wireless
Commissioning Converter
Sensor
Sensor
1
0.8 mm to 1.0 mm
(18 AWG) 2-wire
24 VAC Power Supply - Hot
Supplies 20–30 VAC (Nominal 24 VAC)
HOT
24~
24 VAC Power Supply Common
(Isolated from all other
Common terminals on controller)
35 VA
COM
1
The SA Bus and FC Bus wiring recommendations in this table are for MS/TP bus communications at 38.4k baud. For more
information, refer to the
MS/TP Communications Bus Technical Bulletin (LIT-12011034)
. For more information about N2 bus
communications, refer to the
N2 Communications Bus Technical Bulletin (LIT-636018)
.
Setup and Adjustments
Setting the Device Addresses
Metasys
field controllers are master devices on MS/TP (SA or FC) buses. Before operating field controllers on a
bus, you
must
set a valid and unique device address for each controller on the bus. You set a controller's device
address by setting the positions of the switches on the DIP switch block at the top of the controller (
Figure 3
). Consult
the appropriate Communications Technical Bulletin to find valid addresses for these controllers.
19
FEC1611 and FEC1621 Field Equipment Controller Installation Instructions