Johnson Controls VMA1615, Руководство по установке

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Figure 8: Maximum Wire Length by Current and
Wire Size
Communications bus and supply
power wiring guidelines
Communication bus and supply power table
provides information about terminal block
functions, ratings, and requirements..
In addition, observe these guidelines when wiring
the SA/FC Buses and supply power:
• Run
all low-voltage wiring and cables separate
from high-voltage wiring.
• All FC and SA Bus cables, regardless of wire size,
should be twisted, insulated, stranded copper
wire.
• Shielded cable is strongly recommended for all FC
and SA Bus cables.
• Refer to the MS/TP Communications Bus
Technical Bulletin (LIT-12011034) for detailed
information regarding wire size and cable length
requirements for the FC and SA Buses.
Communication bus and supply
power table
Table 4: Communication bus and supply power terminal blocks, functions, ratings, requirements, and
cables
Terminal block/Port label Terminal labels
Function, electrical ratings/
Requirements
Recommended cable type
1
1
+
-
FC Bus Communications
COM
Signal Reference (Common) for bus
communications
FC BUS
2
2
SHLD
Isolated terminal (optional shield drain
connection)
0.6 mm (22 AWG) stranded, 3-wire
twisted, shielded cable recommended
+
-
SA Bus Communications
COM
SA Bus Signal Reference and 15 VDC
Common
SA BUS 2
SA PWR
15 VDC Supply Power for Devices on the
SA Bus
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 wires are the second
twisted pair.
FC BUS FC BUS
RJ-12 6-Position Modular Port provides
FC Bus Communications
FC Bus provides 15 VDC Power for:
Wireless Bluetooth Commissioning
Converter
Wireless ZigBee Field Bus Router
SA BUS 2
SA BUS
RJ-12 6-Position Modular Port provides
SA Bus Communications
SA Bus provides 15 VDC Power for:
NS Series Sensors
Wireless ZigBee WRZ-78xx Series One-
to-One Wireless Receiver
Wireless Bluetooth Commissioning
Converter (BTCVT)
DIS1710 Local Controller Display
VAV Balancing Tool
24 AWG 3-pair CAT 3 Cable <30.5m
(100 ft)
VMA1615/1626/1628/1630 VAV Controllers Installation Guide 11