Mounting
The RTD interface can be mounted on DIN rails, or on a surface using screws of up to 5mm diameter.
The RTD-NET is supplied with 4 mounting pillars that can be used to mount the interface within units with compatible mounting holes.
Please contact Daikin Technical Support for further details on mounting a RTD interface inside a Daikin indoor unit, as they as can advise you better on their products.
Power
The RTD requires a 15V to 24VDC power connection (see the power ratings, as well as WARNINGS and CAUTIONS on page 4 of attached installation instructions). Power can be supplied from VRV indoor unit PCB X18A or X35A connection, a Skyair indoor unit PCB X35A connection or VAM PCB X11A connection (Please contact Daikin Technical Support for further details on powering the RTD from a unit). A 1m cable and connector is supplied with the RTD.
An external DC power supply can be used as power source, too.
P1P2
Please follow this link for information about P1P2 network requirements.
Wired remote controller
The RTD-NET can operate without an additional wired remote controller (therefore it is optional).
- With respect to compatibility of wired remote controllers to our RTD interfaces, please read this article.
The RTD-NET can operate as both MAIN or SUB P1P2 device. To read some data the RTD-NET needs to be set as MAIN P1P2 device (see attached installation instructions and readback data).
Please follow this link for information on how to configure a device to MAIN or SUB P1P2 mode.
Infrared remote controller
When using infrared remote controllers the BRC infra-red receivers must be configured to operate in SUB (S) mode.
RS485
RS485 Cables must use stranded 24awg shielded or unshielded twisted pair to Cat3, Cat4 or Cat5 specification. Use a twisted pair for connections DB,DA and an extra core for connection GND. Install RS485 cable as shown in figure 4 of the RTD-NET installation instructions. For further detail see page 5 of the installation instructions (RS485 Network Installation).
DIP switches
No specific DIP switch settings are required. However, DIP switches can be used to enable specific functionalities (timeout) and to set the Modbus network address.
Modbus
The RTD-NET supports the Standard RTU Modbus protocol. Please follow this link for RTD baud rate and parity settings. Please see the RTD-NET installation instructions for default Modbus communication parameters, as well as Modbus commands.
The RTD-NET only operate as Modbus slave.
For details on available Modbus registers, please click here.
Status LEDs
The RTD LEDs signal various statuses during start-up, as well as during operation. For explanation of the LED (LED 1 and LED 2) signals please see page 6 and respective figures in the Installation instructions.
Once communication over P1P2 between RTD-NET and indoor unit(s) has been established LED 3 should be flashing indicating that information is being exchanged between the RTD and the indoor unit(s).
Testing
For information on testing, please follow this link.