rako RML1200 Digital Hard Fired Leading Edge Dimmer Module Instruction Manual
- June 5, 2024
- rako
Table of Contents
rako RML1200 Digital Hard Fired Leading Edge Dimmer Module Instruction Manual
Rako RML1200 is a digital, hard-fired, leading edge dimmer module suitable for use with mains voltage tungsten lighting, low voltage tungsten with appropriate transformers and cold cathode lamps. Rako RD dimmer modules are designed to be installed in a lighting circuit and are controlled from Rako scene-sender panels transmitting Rakom encoded radio signals.
Installation
Before commencing installation of a Rako dimmer module first read this
instruction manual carefully. Rako Controls Ltd accepts no
responsibility for any damage or injury caused by incorrect installation of a
Rako product.
Installation should only be carried out by a competent electrician.
Never attempt to connect a Rako dimmer or remove the terminal covers without first isolating the circuit at the fuse/MCB board.
The circuit supplying a Rako dimmer should always be protected by either a 5A fuse or 6A MCB. Under no circumstances should any protection devices with higher ratings be used.
Always mount the unit vertically and ensure that the ventilation slots are not covered.
Whilst the Rako dimmer modules are designed to be completely maintenance free the units should be mounted in a position where access an be gained should there be a fault or re-addressing of the unit be necessary (see ‘Set-up and Addressing’).
Permissible loadings
Mains voltage tungsten – full rating i.e. 1200w.
Transformer fed loads, allow 10% derating, i.e. 1080w of nominal lamp load.
Note:
In the case of transformer fed loads only transformers suitable for use with
leading edge dimmers should be used.
If in doubt contact the Rako customer help-line on 01634 226666.
Connection
To install a Rako dimmer module isolate the supply then undo two screws to remove the lid, giving access to the supply/load terminals. The necessary connections are indicated on the main circuit board. The notation is as follows:
Connection Detail
The cables should be secured using the two cable clamps fitted to the base of the unit.
Note:
To ensure that the cable clamping operates satisfactorily the cabling both supplying the dimmer and to the load should be a minimum of 1.0mm2 with double safety insulation and the wires should be stripped to ensure that the cable bar within the terminal cover clamps firmly on both sets of insulation.
Alternative cable exit can be achieved through the rear face of the unit. A knockout area is provided in the plastic next to each of the terminal blocks.
Once the supply and load cables are connected replace the lid securely before restoring power to the unit.
Rako dimmer modules are not designed for loop in/loop out connections. Should it be necessary to loop the supply on to further fittings then a junction box should be connected in circuit to facilitate this.
When power is connected the Rako unit will fade to a full-on setting. In this way it is possible to leave a conventional lighting switch in circuit to simply fade between full-on and off settings without the use of a Rako control panel. Such a lighting switch can also be used as an override in the event that the batteries in a Rako control panel are not replaced when the low- battery warning signals indicate that this should be done.
Set-up and Addressing
Before any lighting scenes can be programmed (see the wall panel or handheld
instruction manual) the receivers need to be addressed.
To avoid interference between rooms or neighbouring installations a Rako
system should be set to an address other than the factory default of House 1
Room 4. The preferred addressing method is to select a logical House address
number for the project, separate Room addresses for each room within the house
and then sequential Channel numbers for each receiver within each room (see
Fig.5) i.e. Channel 1 for the 1st receiver, Channel 2 for the 2nd etc. The
House and Room addresses are set using the DIP switches on the back of a Rako
controller (see Fig.4) and the Channel address is set by ‘stepping’ through
the channel numbers with a panel in programming mode (see Step 3 overleaf) and
then sending this number (along with the House and Room address) to a receiver
(Step 5).
Setting the address switches.
Each Rako transmitter has two, 8 way banks of switches for setting its address. The two sets of switches allow the user to choose from 256 house addresses and 256 room addresses. To set the address, unclip the rear cover whereupon the banks of switches will be now become visible. To set an address, use a small terminal screwdriver or similar device and carefully move some of the switches into the ‘ON’ position. Addressing uses binary encoding and the value of the switches is shown below.
Note: Any control panels set with the same address will act as two or multi
Fig 3.
Addressing Switches
Fig 5.
Addressing Example
Notes on addressing.
A module will not receive an address of House 0 (All switches set to off) A
dimmer will respond to, but not receive an address of Room 0 (All switches set
to off).
This Room 0 address is used for ‘Master House’ control
A dimmer cannot be set to channel 0.
To program a lighting scene see Wall panel or Hand held manual.
Care and maintenance
A Rako receiver module contains no user serviceable parts. Should for any reason you need to contact us please contact us via our website www.rakocontrols.com or by phoning our customer help line on 01634 226666
Initial Addressing of RML1200 Dimmer
In the following procedure both the controllers (wallpanels and hand held
remotes) and the receivers have an automatic time out after
approximately 3 minutes when in programming or set-up mode. This feature
avoids the possibility of either being left permanently in programming or set-
up mode. This may cause confusion if either the controller or receiver times
out before the procedure is complete. It is worth becoming familiar with the
procedures before starting the addressing procedure. If at any time it is
necessary to start again the controllers can be returned to normal mode by
pressing the ‘Off’ button and the receivers by resetting the electrical supply
