Johnson Controls FAC2611, Руководство по установке

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Figure 8: Maximum wire length for low-voltage (<30
V) Inputs and Outputs by current and wire size
Communications bus and supply power
wiring guidelines
The Communications bus and power supply terminal
block rating and requirements table provides information
about the functions, ratings, and requirements for the
communication bus and supply power terminals. The
table also provides guidelines for wire sizes, cable types,
and cable lengths for when you wire the controller's
communication buses and supply power.
In addition, observe these guidelines when you wire an SA
or FC bus and the 24 VAC supply power:
• Run all low-voltage wiring and cables separate from
high-voltage wiring.
• All SA and FC bus cables, regardless of wire size, should
be twisted, insulated, stranded copper wire.
• Shielded cable is strongly recommended for all SA and
FC bus cables.
• Refer to the MS/TP Communications Bus Technical
Bulletin (LIT-12011034) for detailed information
regarding wire size and cable length requirements for
SA and FC buses.
Communications bus and power supply
terminal block rating and requirements
table
Table 4: Communications bus and supply power terminal blocks, functions, ratings, requirements, and cables
Terminal block/
Port label
Terminal
labels
Function, electrical ratings/Requirements Recommended cable type
+
-
FC Bus Communications
COM Signal Reference (Common) for Bus communications
FC BUS
1
1
SHLD Isolated terminal (optional shield drain connection )
0.6 mm (22 AWG) stranded, 3-wire twisted,
shielded cable recommended
FC BUS 1
(Port)
FC Bus
RJ-12 6-Position Modular Connector provides:
FC Bus Communications
FC Bus Signal Reference and 15 VDC Common
15 VDC, 180 mA, Power for Bluetooth Commissioning
Converter or ZFR or ZFR Pro Wireless Router
Bluetooth Commissioning Converter
retractable cable or 24 AWG 3-pair CAT 3
Cable <30.5 m (100 ft)
+
-
SA Bus Communications
COM SA Bus Signal Reference and 15 VDC Common
SA BUS 1
SA PWR
15 VDC Supply Power for Devices on the SA Bus
(Maximum total current draw for bA Bus is 240 mA.)
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.
Sensor
1
Sensor
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 Bluetooth
Commissioning Converter
24 AWG 3-pair CAT3 cable <30.5 m (100 ft)
HOT
24 VAC Power Supply - Hot
Supplies 20–30 VAC (Nominal 24 VAC)
24~
COM
24 VAC Power Supply Common (Isolated from all
other Common terminals on controller)
14 VA
0.8 mm to 1.0 mm
(18 AWG) 2-wire
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) .
Termination details
A set of Johnson Controls termination diagrams provides
details for wiring inputs and outputs to the controllers.
See the figures in this section for the applicable
termination diagrams.
FAC2611 Advanced Application Field Equipment Controller Installation Guide 10