TOSHIBA > TCC LINK CONTROLS > LTX-51


- MODBUS BMS Connection
- Multiple solutions
 

LTX-51
MODBUS INTERFACE

LTX-51

The LTX-51 interface is a product that has been developed to enable Toshiba air conditioners to directly connect to a Modbus serial port on a BMS outstation. The interface is capable of setting all of the operating parameters for each indoor unit. It also provides error codes and the return air temperatures.

 


Application

The LTX-51 solution is designed to allow connection to a Trend BMS system. It allows a fully functional solution to be achieved. The LTX-51 and associated Toshiba LonWorks gateway are usually mounted in the control panel with the outstation. We have two possible variations, which are outlined below.

LTX-51 and RBC-LG1 Combination

This uses a LTX-51 and an RBC-LG1-PE, which connects to a maximum of sixteen indoor units; however, the TCB-PCNT20TLE network adapters are required to convert back to the AI network. This option will be cost effective for single split installations with less than 7 indoor units for all other situations use the solution below.

LTX-51, LTX-VCI and TCB-IFLN640TLE Combination

This solution uses an LTX-VCI and TCB-IFLN640TLE for the control of a maximum of 64 indoor units. The solution uses an LTX-51 for every 16 indoor units as these connect to the Trend outstations. For example, for a total of 64 indoor units you would use four LTX-51’s.

In each of the above cases, multiples of the above combinations can be used to accommodate larger systems.

 

Connections

LTX-51 and RBC-LG1-PE Combination

The LTX-51 requires a 24V dc supply and the LonWorks gateway requires a 240v supply. The devices are linked on a LonWorks network.

The XY network is connected via a screw terminal connector. The recommended cable is 2-Core Screened 1.5mm2. A serial cable connects the LTX-51 to the outstation.

LTX-51, LTX-VCI and TCB-IFLN640TLE Combination

The LTX-51 and LTX-VCI require a 24V dc supply and the LonWorks gateway requires a 240v supply. The devices are linked on a LonWorks network.

U3/U4 network is connected via a screw terminal connector. The recommended cable is 2-Core Screened 1.5mm2.

A serial cable connects the LTX-51 to the outstation.


 

Limitations

LTX-51 and RBC-LG1-PE Combination

This solution can control a maximum of sixteen indoor units and the TCB-PCNT20TLE network adapters are required for all indoor units.

LTX-51, LTX-VCI and TCB-IFLN640TLE Combination

This solution can control a maximum of sixty-four indoor units with one LTX-51 for every sixteen indoor units.

Dimensions* (H x W x D), mm

LTX-51 155 x 190 x 55
LTX-VCI 155 x 190 x 55
RBC-LG1-PE 227 x 157 x 65
TCB-IFLN640TLE 250 x 250 x 60

*Dimensions include clearances

Solution Components

LTX-21 and RBC-LG1 Combination

Supplier

LTX-51 LonWorks to Trend Gateway (Realtime)
RBC-LG1-PE LonWorks to Toshiba Gateway (Toshiba)
TCB-PCNT20TLE Network adapter AB to XY (Toshiba)

LTX-21, LTX-VCI and TCB-IFLN640TLE Combination

LTX-51 LonWorks to Trend Gateway (Realtime)
LTX-VCI LonWorks Adapter (Realtime)
TCB-IFLN640TLE LonWorks to Toshiba Gateway (Toshiba)
TCB-PCNT30TLE Network adapter to U3/U4 only used for split systems (Toshiba)

Full details and product support for the LTX products can be obtained from CDL/Realtime.  Please contact us for assistance.

 


Downloads


Wiring Diagram