Setup And Adjustments; Setting The Device Address - Johnson Controls FEC26 Installation Instructions Manual

Table 3: Communication Bus and Supply Power Terminal Blocks, Functions, Ratings, Requirements, and
Cables (Part 2 of 2)
Terminal Terminal
Block/Port Labels
Label
2
FC Bus
(Port)
2 +
SA BUS
-
COM
SA PWR
2 SENSOR
SENSOR
24~ HOT
COM
1. See Table 2 to determine wire size and cable lengths for cables other than the recommended cables.
2. 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).

Setup and Adjustments

Setting the Device Address

Metasys field controllers are master devices on
BACnet 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 field controller's device address by setting the
positions of the switches on the Device Address DIP
switch block at the top of the controller (Figure 3).
Device addresses 4 through 127 are the valid
addresses for these controllers.
The DIP switch block (Figure 9) has eight switches
numbered 128, 64, 32, 16, 8, 4, 2, and 1. Switches 64
through 1 are device address switches. Switch 128 is a
mode switch that enables a field controller to operate
on a ZFR1800 Series Wireless Field Bus. Switch 128
must be set to off for all hard-wired SA and FC Bus
applications. Set switch 128 to ON for wireless FC Bus
applications only.
FEC26 Extended Temperature Field Equipment Controller Installation Instructions
Function, Electrical Ratings/Requirements
RJ-12 6-Position Modular Connector provides:
FC Bus Communications
FC Bus Signal Reference and 15 VDC Common
15 VDC, 240 mA, Power for Wireless Commissioning
Converter or ZFR1811 Wireless Router.
SA Bus Communications
SA Bus Signal Reference and 15 VDC Common
15 VDC Supply Power for Devices on the SA Bus
(Maximum total current draw for SA Bus is 240 mA.)
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.
24 VAC Power Supply - Hot
Supplies 20-30 VAC (Nominal 24 VAC)
24 VAC Power Supply Common (Isolated from all other
Common terminals on controller)
Recommended Cable Type
Wireless Commissioning
Converter retractable cable or
24 AWG 3-pair CAT 3 Cable
<30.5 m (100 ft)
0.6 mm (22 AWG) stranded, 4-wire
(2 twisted-pairs), shielded cable
recommended
Note: The + and - wires are one
twisted pair and the COM and
SA PWR are the second twisted
pair of wires.
24 AWG 3-pair CAT 3 Cable
<30.5 m (100 ft)
0.8 mm to 1.5 mm
(20 to 16 AWG) 2-wire
Figure 9: Device Address Switches Set to 21
Note: Metasys field controllers ship with switch 128
ON and the remaining address switches off rendering
the controllers wired slave devices, which do not
operate on MS/TP buses, but do not interfere with bus
operation. Set a valid and unique device address on
the field controller before applying power to the
controller on the bus.
To set the device addresses on Metasys field
controllers:
1. Set all of the switches on the field controller's
device address DIP switch block (128 through 1) to
off.
1
2
11