RML-1200 Instruction Manual

Updated at July 21st, 2025

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Table of Contents

Contents 1.0 What is the RML-1200? 2.0 Loadings 3.0 Installation of the RML-1200 4.0 Initial Checks 5.0 Programming the RML-1200 6.0 Appendix 1: LED Diagnostics

Instruction Manual

RML-1200

1200W Leading Edge Wireless Dimmer

2025

Version 2.0.1

1.0 What is the RML-1200? 3

2.0 Loadings 3

3.0 Installation of the RML-1200 3

4.0 Initial Checks 5

5.0 Programming the RML-1200 5

6.0 Appendix 1: LED Diagnostics 6

1.0 What is the RML-1200?

RML-1200 modules are wireless, leading-edge dimmers suitable for use with mains voltage tungsten lighting and low voltage tungsten with leading-edge dimmable transformers.

RML-1200s are inductive dimmers and are not generally recommended for use with mains dimmable LEDs.

2.0 Loadings

Minimum	20W
Maximum	1200W
Low-voltage transformer loads (leading edge only)	1080W (de-rate by 10%)
Mains voltage LEDs	Not Recommended

3.0 Installation of the RML-1200

Installation should only be carried out by a competent electrician.

RML-1200 modules should be mounted in adequately dry and ventilated areas outside of any enclosed metal casings that may interfere with the wireless signal.

Modules should be mounted vertically, with the terminals at the bottom.

Ensure that cable clamps are securely fitted on the supply and load cables.

While the modules are designed to be completely maintenance-free, they should be mounted in an accessible location should investigation or re-addressing of the units be necessary.

1		Remove the cover by removing the two screws at the bottom of the unit, pulling the bottom of the cover away from the bottom and lifting it up.
2		Insert the supply IN cables as well as the load OUT cables.
3		Fit the supplied cable clamps and ensure the cable is unable to move.
4		Replace the cover and replace the screws.

4.0 Initial Checks

When power is initially connected to the module, the load should power up to full brightness.

The clear button can be used as a manual on/off switch to test the circuit.

The internal LED behind the clear button will flicker when the module receives any Rako Wireless message and is a useful diagnostic indicator. This function becomes inactive after 20 minutes to avoid a nuisance light spill but can be reactivated by pressing the clear button. For more information on LED diagnostics, see 6.0 Appendix 1: LED Diagnostics.

Should the module not respond to any of the above, further investigation must be made before proceeding any further.

5.0 Programming the RML-1200

Once the RML-1200 has powered up and has been tested with the setup button, the device is ready to be programmed.

Programming using a RAMPI or HUB

Wireless System Setup Guide

Programming using an RCM Keypad

Programming With An RCM Guide.

For further general information relating to the RML-1200, see the Wireless Module Application Sheet.

6.0 Appendix 1: LED Diagnostics

Wireless Range

LED Pulses

Description

Good wireless reception

When the unit is receiving successfully, there will be four rapid pulses on the LED when any wireless message is sent.

Bad wireless reception

When the unit is out of range, there will be intermittent pulses on the LED when any wireless message is sent.

It is recommended to install a wireless repeater (WRB-100) if you are experiencing intermittent wireless range.

Should the module not respond to any of the above, check the supply voltage.

For additional diagnostic information, see the Wireless Device LED Diagnostics.

rml-1200 guide