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Controller
Application
The LCBS Connect RTU Controller is designed to control constant volume air handling units,
specifically packaged roof top units (RTU) including heat pumps. It consists of a configurable
controller and a wall module which are connected via Sylk™ bus. The controllers are capable
of stand alone operation but optimal functional benefits are achieved when connected to the
LCBS Connect Honeywell Cloud.
Sylk™ Bus
Sylk is a two wire, polarity insensitive bus that provides both 18 Vdc power and communica-
tions between Sylk-enabled devices. Along with the LCBS Connect wall module, the LCBS
Connect controller can use UP TO FOUR additional Sylk devices for added control. Each
device will have a unique Sylk address (up to 16) and are configured using dip switches on the
back of each device.
Part Number Description Sylk Address(es)
TR40 Sylk Wall Module - Temperature 3, 4, 5, 6
TR40H Sylk Wall Module – Temperature, Humidity
(Note: Counts as TWO Devices)
3 only
TR40CO2 Sylk Wall Module – Temperature, CO
2
(Note: Counts as TWO Devices)
3 only
TR40HCO2 Sylk Wall Module – Temperature, Humidity, CO
2
(Note: Counts as TWO Devices)
3 only
C7400S1000 Sylk Enthalpy Sensor – Temperature, Humidity 8 (Outdoor Air),
9 (Return Air)
The flexibility of Sylk allows for a number of wiring methods (Daisy Chain, Homerun, etc.). The
main consideration is around the maximum distance from a controller to an individual Sylk
device based on the wire sized used.
AWG Single Twisted Pair, NonShielded,
Stranded or Solid
Standard Thermostat Wire (NonTwisted),
Shielded or NonShielded, Stranded or
Solid
1822 400 feet (120 meters) 100 feet (30 meters)
24 300 feet (100 meters) 100 feet (30 meters)
Connections
The LCBS Connect controller is a configurable device with options to configure specific inputs
and outputs to fit the application needs. It can be configured through the local, wall module
display or from the LCBS Connect remote interface when connected to the LCBS Connect
gateway.
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