HONEYWELL UNITARY CONTROLLER - 230 VAC - INSTALLATION INSTRUCTIONS
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SYLK™
Sylk™ compatible wall modules such as TR120 can be
connected to the controller's Sylk™ (terminals 50 and
51).
• The Sylk™ bus is single pair and polarity insensitive.
• Maximum current provided at the Sylk™ interface:
96 mA.
• The maximum number of Sylk™ devices depends on
the following Sylk™ devices specific information:
• Sylk™ power consumption.
• Number of parameters used.
• Total config file size.
The workbench software has a built-in resource
calculator to determine the number of Sylk™ wall
modules.
The following are the Sylk™ wall modules and Sylk™
actuators supported by the Honeywell Unitary
controller.
Supported Sylk™ devices
• Sylk™ wall modules: TR42, TR42-H, TR42-CO2,
TR42-H-CO2, TR71, TR71-H, TR75, TR75-H, TR75-
HE, TR120 (TR75- E), and TR120-H emulation mode
only.
• Sylk™ actuators: MS3103, MS3105, MS3110, and
MS3120
• Sylk™ Sensor: TR40, TR40-H, TR40-CO2, TR40-
HCO2, TR50, C7400S.
NOTE:
• TR42x wall modules must be firmware version
1.00.3 or higher.
• TR70 wall modules are not supported.
NOTE:
• Shielded cable is recommended if there is a need
to reduce the effect of electrical noise.
• These distances also apply to shielded pair.
Table 21. Recommended maximum distances
Single Twisted Pair, Non-
shielded, Stranded or Solid
a)
Standard Non-
twisted Thermostat
Wire Shielded or
Non-shielded,
Stranded or Solid
b)
18 - 22 AWG
(0.048 - 0.028 in)
(0.3 to 1 mm
2
)
24 AWG
(0.022 in)
(0.2 mm
2
)
18 - 24 AWG
(0.048 - 0.022 in)
(0.2 to 1 mm
2
)
500 ft
(150 m)
400 ft
(120 m)
100 ft
(30 m)
a)
As a rule of thumb, single twisted pair (two wires per
cable), thicker gauge, non-shielded cable yields the
best results for longer runs.
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 (including
but not limited to VFDs, electronic ballasts, etc.).
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