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Instruction Manual WCM-D Rako Wired Switch Interface
2026 Version 2.2.4
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Contents 1 What is the WCM-D? 3 2 Installation 3 3 Terminating the WCM-D 4 4 Adding the WCM-D as a Device 4 5 Configuring the WCM-D 6 5.1 Mappings 7 5.2 Inputs 8 5.3 Output Action 9 Appendix 2 - Switch wiring examples 12
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1 What is the WCM-D? The WCM-D allows custom and third-party switch plates to be used in place of a Rako wired keypad (WCM/WK-EOS/WK-MOD, etc).
The WCM-D is designed to fit in a single-gang UK back box. Up to eight switch inputs can be taken per WCM-D. The switch inputs may be momentary or latching.
2 Installation
Connect the Rako Wired 1 Network to the WCM-D following the colour code on the label.
Refer to Terminating the WCM-D for terminating the device on the Rako Wired Network.
Connect the switch 2 between Common and one of the eight inputs.
See Appendix 2 - Switching wiring examples for more examples.
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3 Terminating the WCM-D
No Term (Unterminated) End of line termination Star termination
Used when the WCM-D is When the WCM-D is in the When used in conjunction not at the end of the line end-of-line position and not with a RAK-STAR, a STAR (with or without a connected to a RAK-STAR, a termination is required at RAK-STAR). 120Ω resistor termination is the end of each leg. required. This is usually identifiable by It should be wired as shown two cables being connected This is provided with the (the green pair is connected to the WCM-D. WCM-D. The resistor is to the blue terminals placed between the Blue together with the blue pair). and the Blue/White inputs.
4 Adding the WCM-D as a Device For setup instructions for units shipped before 2022, see Appendix 1.
Before the WCM-D can be configured, it needs to be added as a Device in Rasoft Pro. The following steps assume: A Project File has been created. Rooms have been created. The HUB has been configured. The Channels in the Rooms have been labelled.
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In Rasoft Pro, go to File > New Device
Select "WCM-D" and "Next"
Give the WCM-D a name and select "Next"
Associate the WCM-D with a Room and select "Next"
Connect the Common and Setup terminals together until the LED on the WCM-D flashes, then remove the link. WCM-D Instruction Manual - Page 5 Manual Version 2.2.4
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The blue status bar should reach 100% and "Device found" will show in the setup, select "Next"
5 Configuring the WCM-D
Once the WCM-D has been added as a Device, it needs to be configured according to the 3rd party switch inputs.
Select the WCM-D in the Device Editor
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5.1 Mappings
The WCM-D has 8 inputs labelled A through H.
Each button can have up to three mappings, allowing a single press to transmit multiple commands. For more than three mappings per button, use WK-HUB macros instead.
New mappings can be created by selecting a “Disabled” field and selecting the corresponding input letter in the next column:
Active mappings can be copied or pasted into disabled mappings; this is typically used when reusing similar functions of an existing mapping to save time, such as a toggle function.
Mapping right-click options
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5.2 Inputs
When an input is highlighted blue, it will set the corresponding input letter active in the mapping. Selecting the input multiple times will cycle through the input options which are “Normal”, “Ignore” and “Invert”, an example can be seen below:
"A - Normal" creates a mapping for input A, ensuring that only one input is highlighted blue for each mapping.
If A is set as "Invert", the "On Make" and "On Break" commands will reverse.
Option Description Trigger on Make When the selected input is shorted to common.
Trigger on Break When a switch breaks its contact with common.
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Send Stop On Release When the contact is released, a "Stop" command will be triggered Trigger on Press Trigger the output command when the momentary switching makes contact between its input and common. Trigger on Release Trigger the output command when the momentary switch breaks contact between its input and common Don't update the previous Room If this box is ticked, this map will not update the “last used” flag for both Room and Channel.
5.3 Output Action
Option Description Room The Room number of the output command.
Channel The Channel number of the output command can be All Channels or a single Channel. Disable map Disables the selected mapping. Scene If a Scene is being triggered, select a Scene between 1-16. Fade-Up/Fade-Down Commonly used to manually dim lighting up and down, as well as the Opening/Closing of Blinds.
"Send Stop on Release" should also be checked when using this option. Motor Stop Used to stop 3rd party motors that are configured within the HUB. Ident Causes the target room/channel to flash momentarily and is mainly used for circuit identification during commissioning. Toggle The Toggle function will alternate between two commands. There are three variations of Toggle: WCM-D Instruction Manual - Page 9 Manual Version 2.2.4
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Level (1-100%/0%) Scene (Scene X/ Off) Fade (Fade Up/Fade Down) Level Sets the lighting Level to a percentage of brightness between 0-100%.
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Appendix 1 - Hardware Changes WCMs shipped before 2022 have a different wiring diagram, as shown below. This should also be identifiable from the label attached to the WCM-D itself.
Please ensure that the correct wiring configuration is used; incorrect connections on the wired network side of the WCM-D may cause the Rako wired network as a whole to become offline.
Old WCM-D wiring (RTL1067):
Current WCM-D wiring (RTL1139):
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Appendix 2 - Switch wiring examples
Retractive or latching switches can be used with the WCM-D. Centre retractive switches require two inputs.
Always refer to the manufacturer's instructions on the third-party switches.
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