Seamless connection between VRV and BACnet protocol
Typical BACnet® application
Functions of operating system version 3.0 (Providing interface from BACnet® to VRV.)
BTL CertificationNEW
High reliability product with BTL certification, the symbol of high quality.
*BTL (BACnet Testing Laboratory) was established by BACnet International to support compliance testing and interoperability testing activities.
PPD data
VRV PPD (power proportional distribution) data can be transmitted by BACnet communication for the BMS system.
*Optional Di board (DAM412B51) is required for the PPD system.
ISO 16484-5
Supports BACnet/IP in accordance with ISO16484-5 (Building automation and control systems. Data communication protocol) for BACnet.
Note: Does not support IEEE802.3 protocol for BACnet.
RoHS compliant
We have been making efforts to facilitate the transition to RoHS Directive compliance.
*Refer to the back cover for details of the RoHS Directive.
COV (Change of value)
With the new O.S. a change of object can be automatically read by the BMS without having to constantly scan regularly for any change.
Property array index (Reading of objects)
This is used for objects such as the Schedule Object that use the Property Array included in the device object. The reason why this is sometimes required is so that registration of objects can be done automatically and manual input is not necessary.
The "Object_List" of the device can be read automatically with this index, there by reducing engineering time of programming the indoor units into the BMS.
Segmented requests
This function transmits two or more packets separately, when the amount of data exceeds one packet size.
If there are a large number of indoor units the response is in the "read property request" and the return data are segmented.
Product description
DMS502B51 Specification
Daikin's interface unit for BACnet® communicates with BACnet® clients via BACnet® over ethernet.
This unit provides information for VRV through BACnet® services.
Comformance Class - 3 Data Link Layer Option - BACnet/IP
Specifications of Communication
Monitoring and controlling of A/C
The items to monitor and control air conditioners from BACnet® communication as well as descriptions of each item are listed below.
| Function | Description | |
|---|---|---|
 |
ON/OFF Status | Monitors ON/OFF status of the respective air conditioners. |
| Alarm Sign | Monitors whether air conditioners are operating normally and, if not, sends out an alarm sign. | |
| Error Code | Displays error code specified by the respective manufacturer if an abnormality occurs in the system. | |
| Operation Mode | Monitors status of cooling , heating and ventilation operation. | |
| Room Temperature | Monitors room temperature and displays the actual room temperature. | |
| Filter Limit | Checks the limit of filters in use and monitors if there is a necessity to replace the filters. | |
| Thermostat Status | Monitors whether the thermostat in the air conditioner is operating properly. | |
| Compressor Status | Monitors whether compressors in outdoor units that are connected to the indoor units are operating properly. | |
| Indoor Fan Status | Monitors whether fans in the air conditioners are operating properly. | |
| Heater Operation Status | Monitors whether heaters in the air conditioners are operating properly. | |
| PPD data | Electric total power (number of indoor unit) as an object of accumulator. | |
 |
ON/OFF Operation | Starts and stops the respective air conditioners and monitors control results. |
| Operation Mode Setting | Sets the operation mode (cooling, heating, ventilation or auto mode) and monitors the setting results. | |
| Room Temperature Setting | Sets room temperatures of the respective air conditioners and monitors the setting results. | |
| Filter Limit and Reset | Checks whether there is a use limit for the respective filters and then resets the sign as necessary. | |
| Remote Control Operation Rejection | Sets the permission/rejection function of remote controllers in order not to allow operation control, such as ON/OFF, operation mode and room temperature, from the remote controllers. | |
| Sub Group Address Control Operation Rejection |
Sets the control permission/rejection function of centralized devices (i.e., air conditioners in a sub group address) connected on the DIII-NET. |
|
| Airflow Rate Setting Operation | Sets the airflow rate and monitors the setting results. | |
| Air Direction Setting Operation | Sets the air direction and monitors the setting results. | |
| System Forced OFF Setting Rejection | Upon receiving a Forced OFF Command, checks whether it is a normal reset or forced OFF and then operates as necessary. | |
| Forced Thermostat OFF Setting | Upon receiving a Thermostat OFF command, checks whether it is a rest or set and then monitors setting results. | |
| Energy Efficiency Setting | Upon receiving an Eneregy Effciency Setting command, checks whether it is a rest or set and then monitors setting results. | |
Series and components
| Hardware model name | DMS502B51 | DMS502B51+DAM411B51 (Optional D expansion kit) |
|---|---|---|
| Max number indoor units | 128 | 256 Per Gateway |
| Max number outdoor units | 20 | 40 Per Gateway |
| BMS | Local Procurement | |
Specifications
| Item | Description |
|---|---|
| Model name | DMS502B51(Interface for use in BACnet® ) |
| Transmission | BACnet®/IP Conformance Class 3(ASHRAE135-1995) B-ASC(ASHRAE135-2001) |
| Rated power supply | Single phase AC 100 to 240 10% at 50/60Hz |
| Rated power consumption | Maximum 20W |
| Power supply fluctuation | 10% of the rated value |
| Operable temperature range | –10 to 50°C |
| Storage temperature range | –15 to 60°C |
| Operable ambient humidity | 0 to 98%(No condensation) |
| Insulation resistance | 50MΩ or more by DC500 megohmmeter |
| Installation | Enclosed in electrical panel |
| Dimensions(W x H x D) | 275 x 263 x 81.5(mm) |
| Weight | 3.0kg |
Optional DIII expansion kit
| Item | Model name | DAM411B51 |
|---|---|---|
| DIII Board | DIII Lines | 2 |
Digital input port
| Di (Forced off) | Imbedded in DMS502B51 | 4 |
| Di (kwh metre connection for PPD) |
Optional board (DAM412B51) is required. |
12 |
- *To achieve a seamless connection between both the BMS and Daikin's BACnet interfaces, it is crucial that you contact us prior to any project consideration.
- *For a detailed list of BMS and compatibility specifications please contact your local distributor.
BACnet® is a registered trademark of American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE).
Using interface
Once a month, adjust the clock of the interface.
Daikin's unique PPD system estimates the power consumption of each individual indoor unit based on data communicated from indoor units and compared to the power consumption of an air conditioning installation with a standard setup. Note that PPD is not a "gauge"adapted to the methods of measuring power consumption in each country. All countries differ in the ways tenant billing systems are implemented depending on their respective legal systems. Data obtained by PPD is for reference only and should not be used for official financial transactions.
JMT (Joint Matching Test) is nomally required before project execution.
