BMS Interfaces

FDP3-MODBUS Interface

The FDP3-Modbus is a low cost Modbus based monitoring and control interface for Toshiba VRF and Split ranges of air-conditioners. The interface is compatible with all units that have a TCC-NET A,B remote controller network connection. No other network adaptor cards are required even for split A/C units.

Control Functions

• UNIT CONTROL. Control of Setpoint, Fanspeed, Runmode, Louvre mode and on/off state through Modbus registers.
• REMOTE CONTROLLER Facility to individually lock and unlock each remote controller button associated with unit control.
• FAULT CODES. Readback of all indoor and outdoor unit fault codes
• UNIT TEMPERATURES Indoor unit air and coil temperatures is available RS485 NETWORK Multiple FDP3-Modbus interfaces can be

RTD-10 Daikin Control Interface

The RTD-10 is a monitoring and control interface for Daikin VRV and Skyair ranges of air-conditioners; and VAM and VKM ventilation units. The interface is compatible with all units that have a P1,P2 remote controller network connection and allows control of upto 16 units in a single group.

Control Functions

• HARDWIRED CONTROL. Unit control can be achieved through resistance inputs using resistor, potentiometer and volt-free contact inputs.
• BMS INTEGRATION. Unit control can be achieved through 1-10V voltage inputs integrated with BMS control outputs.
• HEATING INTERLOCK. Units can be interlocked with external heating systems.
• DUTY/STANDBY. Multiple groups can be operated with rotating duty/standby with fault and high temperature alarming.
• MODBUS CONTROL. The RTD supports RS485 Modbus-RTU Protocol for network control and monitoring. Maximum of 16 RTD-10s on a network*.
• CUSTOM CONTROL. RTD interfaces can be supplied in custom configurations to suit specific applications.

*Additional Modbus Engineering instructions and register information is available in the RTD-NET Datasheet.

FDP3-BMS Control Interface

The FDP3 is a low cost monitoring and control interface for Toshiba VRF and Split ranges of air-conditioners. The interface is compatible with all units that have a TCC-NET A,B remote controller network connection. No other network adaptor cards are required even for split A/C units.

Control Functions

• HARDWIRED CONTROL. Unit control can be achieved through resistance inputs using potentiometer and volt-free contact inputs.
• BMS INTEGRATION. Unit control can be achieved through 1-10V voltage inputs integrated with BMS control outputs.
• REMOTE CONTROLLER Facility to individually lock and remote controller buttons associated with unit control.
• RUN/FAULT Outputs. Readback of all indoor and outdoor unit fault codes and unit run status.
• DUTY/STANDBY. Run/standby rotation with run on fault and programmable rotation period.

RTD-NET Daikin Modbus Interface

The RTD-Net is an RS485 Modbus-RTU interface for monitoring and control of Daikin VRV and Skyair ranges of air-conditioners; and VAM and VKM ventilation units. The interface is compatible with all units that have a P1,P2 remote controller network connection and allows control of up to 16 units in a single group. Up to 62 RTD-NETs can be placed on a single RS485 network.

Control Functions

• GROUP CONTROL. Group control of unit settings such as Setpoint, Fanspeed, Run Mode, Louvre and On/Off State
• KEYPAD CONTROL. Control of lock/unlock state of individual buttons on wired remote controller and the ability to limit ranges of user adjustment.
• UNIT MONITORING. Group and individual readback of unit data including Fault Codes, Unit Temperatures.
• VAM CONTROL. Control of VAM and VKM unit fanspeed and damper position
• CUSTOM CONTROL. RTD interfaces can be supplied in custom configurations to suit specific applications.

RTD-HO Daikin Control Interface

The RTD-HO is a control interface for Daikin VRV and Skyair ranges of air-conditioners. The interface is compatible with all units that have a P1,P2 remote controller network connection and allows control of up to 16 units in a single group.

The RTD-HO is designed to manage hotel rooms where a volt-free contact is used to indicate room occupancy status. When the room is occupied the occupant is allowed full access to the A/C operation through a wired remote controller, with setpoints limited to the range 19 to 24 or 29 in High Temperature Mode.

When the room is unoccupied the RTD will initially operate the room to maintain minimum comfort conditions for the occupant. After 18 hours the RTD reverts to the Unoccupied state and only operates the A/C to protect the room from extreme temperatures.

The RTD-HO also supports a window switch input to prevent unit operation when the room window is opened.

FDP2-F Fault Interface

The FDP2-F provides fault monitoring functionality with the ability to operate units in either local or central modes. Three preset modes can be set in order to lock the keypad and operate the units in Heat, Cool or Auto modes.

Group control can be achieved by networking multiple FDP2-Fs on the D-Bus network. If the master is operated in local mode then the additional FDP2-Fs act as slaves and so very large numbers of units can be operated from a single keypad. Alternatively the master can be operated in one of the central preset modes in which case all slaves operate to the same settings. If an FDP2-BMS is used as the master then the FDP2-F slaves can extend the control to a large number of units.

A pair of FDP2-Fs can be operated as a duty/standby pair with 24 hour duty changeover as well as changeover on fault. For more information on applications, download the FDP2 Application Guide.

FDP2-BMS Control Interface

The FDP2-BMS in its factory configuration is configured so that the 6 inputs can be connected to switches and variable resistances, or voltage sources such as BMS outputs, so that various unit functions can be altered. The inputs allow the unit setpoint, fanspeed, mode, louvre operation, on/off state and keypad lock state to be altered. This allows basic control of the units operation without the need for any reconfiguration of the FDP2. When switching between central and local control, an the FDP2-BMS can be configured to restore the user settings from the previous local operation.

The size of the group can be extended by adding additional FDP2-F and FDP2-BMS on the D-Bus network. For more information on applications, download the FDP2 Application Guide.

LTX-51 Modbus to LonWorks A/C Interface

The LTX-51 is the first of a range of Modbus to LonWorks Gateways designed for interfacing conventional BMS control systems with LonWorks based systems. The LTX-51 is a BMS interface for controlling air-conditioning units. The interface provides a wide range of functionality including indivual and master/slave control of units, local user control and unit temperature and fault code feedback. Compatable with Toshiba RAV products using the Toshiba LG1 and RealTime LRC-LG interfaces. Compatible with Mitsubishi, Daikin and Hitachi systems using the RealTime LTX-VCI.

The LTX-51 is compatible with any BMS control system with a suitable Modbus interface, systems tested include products from manufacturers including Satchwell, Landis & Staefa/Siemens, Andover, Cylon and Crestron for other manufacturers please contact RealTime for details.

LTX-21 BMS-A/C Interface

LonWorks to BMS Gateway for integrating package air-conditioning units with Trend Building Management Systems. Provides control of individual units and groups, software master/slave groupings and feedback of unit fault codes and temperatures. Compatable with all Toshiba RAV products using the Toshiba LG1 and RealTime LRC-LG interfaces. Compatible with Mitsubishi, Daikin and Hitachi systems using the RealTime LTX-VCI.

Selected pages extracted from the left datasheet

LTX-21 Short Datasheet    LTX-21 Installation Instructions    LTX-21 Command Summary

Interactive LTX-21 Commissioning Sheet

Commissioning sheet in a printable Word document form. The file is read-only, use this as a template for each job and use "save as" to save the sheet as another document.

LTX-21 Commissioning Sheet

LTX-VCI A/C Interface

The RealTime LTX-VCI extends RealTime air-conditioning control solutions by providing a compatible interface to a range of air-conditioning manufacturers. The LTX-VCI acts as virtual interface that allows the existing range of RealTime air-conditioning BMS interfaces and LonWorks Controllers to be instantly compatible with additional air-conditioning manufacturers products. The LTX-VCI v1.05 is compatible with the following interfaces.

The VCI provides the necessary functionality to control individual A/C units as well as return fault and temperature readback data from each unit in a format compatible with existing RealTime BMS control solutions. The VCI can handle manufacturer interfaces with up to 64 units.

RTD-W Daikin Control Interface

The RTD-W is a monitoring and control interface for Atherma HT hydroboxes (heating only and reversible), small inverter chillers (EWA/YQ16..64 series) and VRV heating only hydrobox. The interface is compatible with all units that are operated using a BRC21 remote controller network connection and allows control of up to 16 units in a single group.

RTD-RA Daikin Control Interface

The RTD-RA is a monitoring and control interface for the Room Air-conditioner range of air-conditioning units. The interface is compatible with the indoor units that have a S21 remote controller network connection. Control functions include:

• STAND ALONE MODE: Allows energy-efficient operation of a Room Air-conditioner by restricting user operating ranges and unit locked off defined by volt-free contact input.
• MODBUS SLAVE MODE: Allows control and monitoring of unit operation using RS485 Modbus commands.
• RTD CLONE MODE: Configures the RTD-RA to duplicate the operating settings of another RTD or RTD-RA device on the RS485 network. Allows creation of group controlled devices.
• RTD-10 DUTY/STANDBY SLAVE: Configures the RTD-RA to operate in an RTD-10 Duty/Standby network. An RTD-10 Master controlling Skyair or VRV units can be integrated with one or more Room Air Conditioners in a Duty/Standby configuration.
• RTD-20 RETAIL CONTROL MODE: The RTD-RA can be integrated into an RTD-20 Retail Control network. The RTD-RA can be configured to operate as a User Control Zone or to operate in Clone Mode and duplicate the control settings from anther device on the network.

RTD-20 Daikin Control Interface

The RTD-20 is a monitoring and control interface for VRV and Skyair ranges of air-conditioners and VAM ventilation units. The interface is compatible with the units that have a P1,P2 remote controller network connection and allows control of up to 16 units in a single group. Control functions include:

• RETAIL MODE: Up to 16 RTD-20s can operate as a coordinated Retail Control System. Multiple Shop Floor and User Control Zones can be controlled with global or zone level settings. Zone setpoints can be limited or locked to restrict staff control of the system. Energy Efficient unit control minimises operating costs.
• VAM CONTROL: Advanced control of VAM Units with energy efficient operation of heat-recovery and 3 speed fan control with optional CO2 sensor speed control. Supports integration with Retail Mode.
• AIR CURTAIN CONTROL: Advanced control of CYQ* & CYV* Air Curtains Units with energy efficient operation, Outside Air compensated operation Supports integration with Retail Mode including optional cooling interlock.
• PARTITIONED ROOM CONTROL: Up to 4 zones can be operated as stand-alone systems that automatically group together when connecting partitions are opened.
• ERQ MODE: The RTD-20 ERQ mode gives a linear 0-10VDC capacity control of the range of ERQ condensers for cooling and heating coils within air handling units.

RTD Interfaces - Additional files