19
31-XXXX-XX
Prelim Draft - Brand Neutral
BACNET IP/MSTP VAV - INSTALLATION INSTRUCTION
NOTE:
Surface
•
Do not install the antenna close to the floor.
Figure 19. Remote Antennae Placement
•
The Local antenna can be used when the IP and MSTP VAV
controller is installed in a plastic cabinet/enclosure.
SYLK BUS™
Sylk™ Bus capable wall modules such asTR40x / T42x can be
cosnnected to the controller's Sylk™ Interface (terminals 14 and
15).
•
The Sylk™ Bus is single pair, and polarity-insensitive.
•
Maximum current provided at the Sylk™ Bus interface: 96 mA.
•
The maximum number of wall modules depends on the
following wall module specific information:
—Sylk™ bus power consumption
—Number of parameters used
—Total config file size
The Niagara tool has an inbuilt resource calculator to
calculate the number of Sylk™ wall modules.The Sylk™ devices
supported by the WEB-VA423B24N are;
•
TR40, TR40-H, TR40-CO2, TR40-H-CO2
•
TR42, TR42-H, TR42-CO2, TR42-H-CO2,
•
TR71, TR71-H,
•
TR75, TR75-H,
•
TR120, TR120H and
•
C7400S Sylk™ sensor.
Table 11. Recommended max. distances from controller to TR40x/T42x
wall modules (Continued)
Single twisted pair, Non-Shielded,
Stranded or Solid
c)
Standard non-twisted
thermostat wire shielded
or Non- Shielded,
Stranded or Solid
d)
500 ft
(150 m)
400 ft
(120 m)
100 ft
(30 m)
c)
As a rule of thumb, single twisted pair (two wires per
cable, only), thicker gauge, non-shielded cable yields the best results
for longer runs.
d)
The 100 ft (30 m) distance for standard thermostat wire is
conservative but is meant to reduce the impact of any sources of
electrical noise (incl. but not limited to VFDs, electronic ballasts,
etc.). Shielded cable recommended only if there is a need to
reduce the effect of electrical noise.
These distances apply also for shielded twisted pair.
Table 11. Recommended max. distances from controller to
TR40x/T42x wall modules
Figure 20. Sylk™ Wiring Topologies
Single twisted pair, Non-Shielded,
Stranded or Solid
c)
Standard non-twisted
thermostat wire shielded
or Non- Shielded,
Stranded or Solid
d)
18 - 22 AWG (0.33
to 0.82mm2)
24 AWG
(0.20 mm2)
18 - 24 AWG (0.20
to 0.82 mm2)
NOTE:
The TR42x Wall Module must be version 1.00.3 or higher.
TR70 Wall Modules are not supported.
Sylk Device
e.g. TR40, TR42.
14 15
polarity
independent
to additional
Sylk devices
Home Running
Daisy Chaining
Number of Devices: Subject to power loading - refer to device
documentation).
IP VAV
IP VAV
FAN OVERRIDE
Su
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