LON-WA TDC

For the temperature-based control of adjustable air terminal devices, for heating or cooling mode

Ideal adjustment of the discharge angle to varying loads

  • For adjustable air terminal devices
  • Heating, cooling, isothermal operation
  • Adjustment of the discharge direction based on the supply air to room air temperature
  • Bespoke solutions, adjustment of the characteristic
  • For up to 20 heating/cooling actuators (3-point)
  • For up to 10 modulating rotary actuators or 5 modulating spindle actuators
  • Override controls

LON-WA TDC 00137436_0


  • Application
  • Description

Application

  • Type LON-WA TDC control modules for the temperature-based control of adjustable air terminal devices, for heating or cooling mode
  • For air terminal devices Types VD, VDL, VDR, QSH, ISH, TJN, DUK and DG-VAR
  • Heating, cooling, isothermal operation
  • Analogue output for modulating actuators
  • Digital output for 3-point actuators
  • LonWorks interface for the transmission of standard network variables
  • A plug-in for all LNS-based network integration tools (LNS version 3.3 and higher) is available for configuration

Special characteristics

  • Bespoke solutions since the characteristic can be adjusted
  • Temperature values are transmitted as voltage signals or network variables
  • Control input for actuators with a modulating signal (0 – 10 V DC) or 3-point (24 V AC)
  • Override control functions for heating up, variable operation, heating, cooling and isothermal operation

Parts and characteristics

  • Microprocessor system with programme and system data stored in nonvolatile memory
  • Double-stack terminal block for supply voltage connection and communication cable
  • Inputs and outputs with screw terminals

Construction features

  • PCB with terminals enclosed in a casing
  • Casing is to be screw-fixed to the installation surface
  • Casing with knockouts for cables

Materials and surfaces

  • Plastic casing

Maintenance

  • Maintenance-free as construction and materials are not subject to wear

Technical information

Function, Technical data, Specification text, Order code

  • Function
  • Technical data
  • Specification text
  • Order code

Functional description

Adjustable air terminal devices with actuators are used to achieve the best possible air distribution in high and large rooms with changing thermal loads. Type LON-WA TDC control modules control actuators based on the supply air to room air difference.

Supply air temperature and room air temperature are measured with external sensors and transmitted as voltage signals or LonWorks network variables Characteristic curve values translate into discharge angles, and the actuators are set accordingly.

Override functions are available to set various operating modes.

The program sequence of the control module includes a watchdog and a heartbeat function to monitor and maintain operation.

Operating modes

Temperature difference control

  • Calculation of the supply air to room air temperature difference
  • Discharge angle corresponds to characteristic
  • Standard operating mode if temperature difference control has been configured
  • No override functions


Variable operation

  • Direct control of the discharge angle with a voltage signal (AI1) or with a network variable (nviManCntrl)
  • Temperature difference is neglected
  • Standard operating mode if variable operation has been configured
  • No override functions


Cooling

  • Override function, the discharge angle is reduced to the minimum
  • Minimum angle is defined with SCPTminRnge (nvoActuatorPos)
  • Set via DI1 or nviDI1_State


Isothermal operation

  • Override function, the discharge angle is neutral
  • Neutral position is defined with SCPTdischargeAirHeatingSetpoint
  • Set via DI2 or nviDI2_State


Heating

  • Override function, the discharge angle is increased to the maximum
  • The maximum angle is defined with SCPTmaxRnge (nvoActuatorPos) and SCPTdischargeAitCoolingSetpoint
  • Set via DI3 or nviDI3_State


Heating up

  • Override function, the discharge angle is reduced to the minimum
  • Set via DI4 or nviDI4_State

Inputs

Two analogue inputs

  • Analogue inputs with configurable characteristic for signalling the supply air temperature and the room air temperature
  • With variable operation: Analogue input for signalling the setpoint discharge angle


Four digital inputs

  • Digital inputs for volt-free switches
  • Override functions for variable operation, cooling, heating and isothermal operation

Outputs

One analogue output

  • Analogue output with configurable characteristic for signalling to modulating actuators


Two digital outputs

  • Digital outputs for signalling to heating/cooling actuators, 2-wire control (3-point)

Interface to the central BMS

  • Actual operating values and fault messages of the control module are transferred via the network
  • Supply air temperature, room air temperature, discharge angle
  • Status of the digital inputs and voltage at each analogue input

Supply voltage

24 V AC ± 15 %, 50/60 Hz

Power rating

3.5 VA

Communication interface

LonWorks transceiver FTT-10A (free topology, twisted pair)

Connection to LonWorks network

4 terminals for cables with a cross section between 0.08 and 2.5 mm², with reverse polarity protection

Operating temperature

0 – 50 °C

IEC protection class

III (protective extra-low voltage)

Protection level

IP 65

EC conformity

EMC to 2004/108/EU, low voltage to 2006/95/EU

Dimensions (B × H × T)

160 × 120 × 42 mm


Control modules for signalling the temperature-based control input signal to adjustable air terminal devices with an actuator. For the connection of external temperature sensors for supply air and room air. A project-specific characteristic with two operating points to define the discharge angle based on the supply air to room air temperature difference is stored in the control module and cannot be deleted.

Ready-to-operate unit which consists of a PCB and a casing with knockouts. Control module electronics using a microprocessor, with configuration settings stored in EEPROM memory and hence safe in case of a power failure. Two analogue inputs, four volt-free digital inputs, one analogue output and two digital outputs as relay contacts.

The control modules include a LonWorks transceiver FTT-10A (free topology, twisted pair) and a service pin for LonWorks integration.

For the connection of modulating actuators to the analogue output, or of heating/cooling actuators (3-point) to the digital output.

Special characteristics

  • Bespoke solutions since the characteristic can be adjusted
  • Temperature values are transmitted as voltage signals or network variables
  • Control input for actuators with a modulating signal (0 – 10 V DC) or 3-point (24 V AC)
  • Override control functions for heating up, variable operation, heating, cooling and isothermal operation

Materials and surfaces

  • Plastic casing

Technical data

  • Supply voltage: 24 V AC ±15 %, 50/60 Hz
  • Power rating: 3.5 VA
  • Communication interface: LonWorks transceiver FTT-10A (free topology, twisted pair)
  • Connection of LonWorks network: 4 terminals for cables with a cross section between 0.08 and 2.5 mm², with reverse polarity protection
  • IEC protection class: III (protective extra-low voltage)
  • Protection level: IP 65

00100156_0
 

 Type
LON-WA TDC Module for the control of supply air based on the supply air to room air difference

 

LonWorks interface, Dimensions and weight

  • LonWorks interface
  • Dimensions and weight
Virtual function block 00182837_0


Description of network variables (SNVT)

All variables and parameters are based on standard network variables (SNVT); this ensures integration of LON-WA TDC with a LonWorks network.

Operating mode default setting

  • Input variables nviDI1_State, nviDI2_State, nviDI3_State, nviDI4_State for operating modes
  • nviDI1_State has the highest LON priority
  • nviDI4_State has the lowest LON priority
  • The valid binding of an input variable results in a valid operating mode default setting
  • The invalid binding of an input variable does not result in an operating mode default setting in LON

Data points

Name of variable Data type Meaning

nviDI1_State

SNVT_switch

Operating mode default setting – cooling

nviDI2_State

SNVT_switch

Operating mode default setting – isothermal operation

nviDI3_State

SNVT_switch

Operating mode default setting – heating

nviDI4_State

SNVT_switch

Operating mode default setting – variable operation or heating up

nviDuctTemp

SNVT_temp_p

Supply air temperature actual value as LON data point

nviRoomTemp

SNVT_temp_p

Room temperature actual value as LON data point

nviManCntrl

SNVT_lev_percent

Discharge angle default setting

nvoActuatorPos

SNVT_lev_percent

Setpoint position of the actuator

nvoAI1_Voltage

SNVT_volt

Voltage at analogue input AI1 (supply air temperature)

nvoAI2_Voltage

SNVT_volt

Voltage at analogue input AI2 (room temperature or default for variable operation)

nvoAIDuctTemp

SNVT_temp_p

Supply air temperature actual value from AI1

nvoAIRoomTemp

SNVT_temp_p

Room temperature actual value from AI2

nvoAIManCntrl

SNVT_lev_percent

Setpoint position of the actuator during variable operation, at AI2

nvoAO_Voltage

SNVT_volt

Actual voltage at the analogue output

nvoDeltaTemp

SNVT_temp_p

Actual temperature difference

nvoDischargeAng

SNVT_angle_deg

Actual discharge angle

nvoDuctTemp

SNVT_temp_p

Supply air temperature actual value

nvoRoomTemp

SNVT_temp_p

Room temperature actual value

nvoManCntrl

SNVT_lev_percent

Setpoint discharge angle during variable operation, default from AI2 or nviManCntrl

nvoState

SNVT_state

Status information


Configuration parameters

Parameter Data type Meaning

SCPTdeviceGroupID

SCPT_deviceGroupID

Air terminal device and actuator

SCPTdirection

SCPT_direction

Assignment of inputs and outputs

SCPTdischargeAirCoolingSetpoint

SCPT_dischargeAirCoolingSetpoint

Supply air to room air temperature difference for maximum cooling

SCPTdischargeAirHeatingSetpoint

SCPT_dischargeAirHeatingSetpoint

Supply air to room air temperature difference with isothermal operation

SCPTholdTime

SCPT_maxSendTime

Duration of heating up

SCPTpwrUpDelay

SCPT_pwrUpDelay

Actuator synchronisation intervals (3-point)

SCPTsceneNmbr

SCPT_sceneNmbr

Software version

SCPToffsetTemp (nviRoomTemp)

SCPT_offsetTemp

Room temperature default at constant room temperature

SCPTmaxRnge (nvoActuatorPos)

SCPT_maxRnge

Maximum discharge angle

SCPTmaxSendTime (nvoActuatorPos)

SCPT_maxSendTime

Interval for sending nvoActuatorPos

SCPTminRnge (nvoActuatorPos)

SCPT_minRnge

Minimum discharge angle

SCPTsndDelta (nvoActuatorPos)

SCPT_sndDelta

Value difference for sending nvoActuatorPos

SCPTmaxRnge (nvoAI1_Voltage)

SCPT_maxRnge

Maximum voltage at AI1

SCPTminRnge (nvoAI1_Voltage)

SCPT_minRnge

Minimum voltage at AI1

SCPTmaxRnge (nvoAI2_Voltage)

SCPT_maxRnge

Maximum voltage at AI2

SCPTminRnge (nvoAI2_Voltage)

SCPT_minRnge

Minimum voltage at AI2

SCPTmaxRnge (nvoAIDuctTemp)

SCPT_maxRnge

Maximum supply air temperature

SCPTminRnge (nvoAIDuctTemp)

SCPT_minRnge

Minimum supply air temperature

SCPTmaxRnge (nvoAIRoomTemp)

SCPT_maxRnge

Maximum room temperature

SCPTminRnge (nvoAIRoomTemp)

SCPT_minRnge

Minimum room temperature

SCPTmaxRnge (nvoAO_Voltage)

SCPT_maxRnge

Maximum voltage at AO1

SCPTminRnge (nvoAO_Voltage)

SCPT_minRnge

Minimum voltage at AO1

SCPTmaxSendTime (nvoDeltaTemp)

SCPT_maxSendTime

Interval for sending nvoDeltaTemp

SCPTsndDelta (nvoDeltaTemp)

SCPT_sndDelta

Value difference for sending nvoDeltaTemp

SCPTmaxRnge (nvoDischargeAng)

SCPT_maxRnge

Maximum discharge angle

SCPTmaxSendTime (nvoDischargeAng)

SCPT_maxSendTime

Interval for sending nvoDischargeAng

SCPTminRnge (nvoDischargeAng)

SCPT_minRnge

Minimum discharge angle

SCPTsndDelta (nvoDischargeAng)

SCPT_sndDelta

Value difference for sending nvoDischargeAng

SCPTmaxSendTime (nvoDuctTemp)

SCPT_maxSendTime

Interval for sending nvoDuctTemp

SCPTsndDelta (nvoDuctTemp)

SCPT_sndDelta

Value difference for sending nvoDuctTemp

SCPTmaxSendTime (nvoRoomTemp)

SCPT_maxSendTime

Interval for sending nvoRoomTemp

SCPTsndDelta (nvoRoomTemp)

SCPT_sndDelta

Value difference for sending nvoRoomTemp

SCPTmaxSendTime (nvoManCntrl)

SCPT_maxSendTime

Interval for sending nvoManCntrl

SCPTsndDelta (nvoManCntrl)

SCPT_sndDelta

Value difference for sending nvoManCntrl


LON-WA TDC 00182975_0


Installation details

  • Installation details

Installation and commissioning

  • Fix the casing with two screws
  • A trained LonWorks systems integrator must carry out the integration into the overall system
  • Temperature sensors, e.g. active duct temperature sensor and active room temperature sensor, 0 – 10 V DC each, which corresponds to 0 – 50 °C; to be provided by others

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Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265