Wrist rumbler

The rumbler consists of two motors - one for the left side and one for the right side. They have a pulsed input voltage and the way that the motors are fixed causes vibration in the rumbler unit when they turn. See the Wallwasher main unit / Wallwasher circuit description and Wallwasher main unit / Wallwasher circuit diagram pages for more details.

Extending the cable

The pin-out of the connector is shown below. Note that two pins are shorted together. These need to be like this for the rumbler to be detected by the wallwasher. If you are using an eight wire plus screen extension cable, then the short circuit will still be made when the rumbler is connected to the end of the extension. If you are making your own cable up to connect another piece of equipment to the wall washer via the rumbler socket, or you need to replace the rumbler cable or plug for any reason, then you must make sure that the relevant pins in the new plug are connected together.

The cable is shielded and contains four wires, red and white for the left motor, brown and orange for the right motor (although the colours used and the connections inside the rumbler may vary). There is no connection to the cable screen inside the rumbler. The screen connects to the metal shell of the rumbler plug and thus to ground via the socket shell on the wallwasher.

The rumbler is connected to the wallwasher by 8-pin mini-din connectors. These connectors are standard 8-pin. It is unlikely that you will find an extension cable. The line plug and line socket should be easily available from a local stockist. If you do find an extension cable, check / confirm that all pins are connected.

If you are making your own extension cable, the simplest way is to buy eight core shielded cable and connect all pins / holes. You could use six core cable and not connect any wires to the “No Connection” pins / holes. Or you could use four core shielded cable and short out the two pins inside the plug that will go to the wallwasher, connecting the four wires to the four pins / holes that are used for the two motors. The cable shield must be connected to both the plug shell and the socket shell. It doesn’t matter what colour the wires are as long as the same colour goes to the same number pin / hole - i.e. Pin 1 goes to hole 1 and so on.

Testing the cable

Do a grid test on the cable before connecting the rumbler to make sure there are no short circuits and that the

correct pins / holes are joined together

Replacing the cable

Open the rumbler and make a note of where the existing wires go. Get the cable as above. Get an 8-pin mini-din line plug. Wire the plug as above, don’t forget to add the short between the two pins. Solder the wires to the motors. If you are using the same colour wires from the plug to the motors, then that will be all you need to do. If you are using different colour wires, then you need to identify what wire goes from what pin to the connection on the motor.

On some rumblers, the wires from the plug go straight to the motors. On others, the wires from the plug may be terminated at a connection inside the rumbler and separate wires go to the motors. Once finished, check the connections are correct before plugging the fan in. Check there is not a connection between either of the VCC pins and GND.

Fig. R1:  Grid test - cable wired correctly