Honeywell ComfortPoint Open CPO-VAV2A, Руководство по установке

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CABLING
EN1B-0022 IE10 R0717 12
Cable lengths and cross sectional areas
1.E.g. for 0-10 VDC input, NTC20K, PT1000, dry
contact, 0-10 VDC output.
MS/TP cable specification
Use Belden 9841 or Equivalent cable with the following
specifications
• An MSTP EIA-485 network shall use shielded, twisted-pair
cable with characteristic impedance between 100 and 130
ohms.
• Distributed capacitance between conductors shall be less
than 100 pF per meter (30 pF per foot).
• Distributed capacitance between conductors and shield
shall be less that 200 pF per meter (60 pF per foot).
• Foil or braided shields are acceptable.
• The maximum recommended length of an MS/TP segment
is 1000 meters.
Sylk Bus cable specification
• Polarity insensitive
• Can use daisy chain wiring for multiple Sylk devices. If
wire size is too thick for two wires in the terminal, use
pigtails.
Connection drawings
This section describes example connection drawings of the
CPO-VAV2A controller with:
• MS/TP bus
• Sylk bus
• 24 VAC power, and IO connection
Signal type Cross-sectional
Less than or
equal to 300 Ft.
(100m)
Less than or
equal to 500 ft.
(170 m) Less than or
equal to 1300 ft.
(400 m)
Power
supply (24
VAC)
Less than or
equal to 16
AWG (Greater
than or equal
to 1.5 mm
2
)
Less than or
equal to 14
AWG (Greater
than or equal to
-
Low current
signals
1
Less than or equal to 20 AWG (Greater than or
equal to 0.5 mm
2
)
Attention
The maximum length of a signal cable with 24
VAC supply is 550 ft. (170 m). The max. length of
a two-wire, 0-10 Vdc signal cable is 1300 ft. (400
m). The secondary side of the transformer must
not be connected to earth ground.
Installing a fuse on the secondary side of the
transformer is recommended to protect the
devices against incorrect wiring.
Recommended maximum distance
from controller to any Sylk device
Quantity
and type of
device
Single twisted pair, non-
shielded, stranded or solid
Standard
thermostat wire, (non-
twisted), shielded or
nonshielded, stranded or
solid
18-22 AWG 24 AWG 18-24 AWG
3 wall
modules,
any type
500 ft
(150 m)
400 ft
(120 m)
100 ft
(30 m)