Sylk™ Bus; Supported Sylk Bus Devices; Sylk Bus Wiring Example - Honeywell Spyder 7 Installation Instructions Manual

SPYDER MODEL 7 VAV CONTROLLER INSTALLATION INSTRUCTIONS
SYLK™ BUS
Sylk™ Bus compatible wall modules such as TR120 can
be connected to the controller's Sylk™ (terminals 14 and
15).
• Sylk™ is a two wire, polarity insensitive bus.
• The maximum current provided at the Sylk™ bus
interface is 96 mA.
• The WEBs-N4 software has a built-in resource
calculator to calculate the number of Sylk™ wall
modules can be connected. The WEBs-N4 calculates
the maximum number of modules based on the
following information for each wall module:
• Sylk™ bus power consumption.
• Number of parameters used.
• Total config file size.

Supported Sylk bus devices

The Spyder Model 7 VAV supports the following Sylk™
devices and actuators.
• Sylk™ bus modules: TR40, TR40-H, TR40-CO2,
TR40-H-CO2, TR42, TR42-H, TR42-CO2, TR42-H-
CO2, TR71, TR71-H, TR75, TR75-H, TR120, and
TR120-H.
• Sylk™ actuator: MS3103, MS3105, MS4103,
MS4105, MS7403, MS7405, MS7503, MS7505,
MS8103, MS8105 spring return direct-coupled
actuators (DCA) are used within heating, ventilating,
and air-conditioning (HVAC) systems. They can drive
a variety of quarter-turn, final control elements
requiring spring return fail-safe operation.
NOTE:
• The firmware version for TR42x wall modules
must be 1.00.3 or higher.
• TR70 wall modules are not supported.
Table 22. Recommended maximum distances
Single Twisted Pair, Non-
shielded, Stranded or Solid
24 AWG
18 - 22 AWG
(0.048 - 0.028 in)
(0.022 in)
2
(0.3 to 1 mm )
(0.2 mm
500 ft 400 ft
(150 m) (120 m)
a)
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.
31-00475-01
Standard Non-
twisted Thermostat
Wire Shielded or
a)
Non-shielded,
Stranded or Solid
18 - 24 AWG
(0.048 - 0.022 in)
2 2
) (0.2 to 1 mm )
100 ft
(30 m)
Table 22. Recommended maximum distances
Single Twisted Pair, Non-
shielded, Stranded or Solid
b)
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.).
NOTE:
• Shielded cable is recommended if there is a need
to reduce the effect of electrical noise.

Sylk bus Wiring Example

WM1 WM2
14 15
Polarity-
independent
Spyder
Model 7
b)
Star Topology
Number of Devices: Subjected to power loading.
Fig. 34 Sylk™ Wiring Topologies
28
Standard Non-
twisted Thermostat
Wire Shielded or
a)
Non-shielded,
Stranded or Solid
Sylk Device
e.g. TR75, TR120,
69.8 °F
TR40, and TR42.
FAN OVERRIDE
To additional
Sylk devices
Spyder
Model 7
Daisy Chain
b)