4QDs' new Reversing Bell throttle hand control and associated Horn Relay board are designed to simplify miniature Loco wiring whilst maximising features available,
The Reversing Bell throttle gives dead man control and may be used without the additional horn relay board.
By cutting one track on the board, 12v horns and lighting may be used with a 24v controller. See instruction manual (PDF format).
A special version of this hand control box is supplied to Phoenix Locomotives Ltd.
Wiring for a loco could not be simpler!

Wiring for the earlier NCC series is the same.
Pro-120
The wiring for a Pro-120 controller is identical.
4QD series controller
To use a 4QD series controller, only the Control lead has to be changed to a CLM-834 instead of the CLM-806.
The CLM-834 has one 6 way IDC and one 4 way IDC which plug straight into the sockets on the 4QD series controller.
Also available is a wiring diagram for use with 12v lights and horns using the bottom battery of the 24v pair.
A diagram is also available showing a 24v system with a separate 12v battery for lights and horns.
Omega Series Controllers
We supply to Phoenix Locomotives Ltd a complete wiring kit which uses a different version of the HRB-810 and an Omega-S controller. This is only available from Phoenix. Wiring details are available.
A fault in the battery wiring can cause a fire risk. The circuit breaker minimises such risk and also serves as a convenient 'off' switch to completely disconnect the batteries. It can be in battery positive, battery negative or (as shown here) between the batteries. It should be rated not more than about 50-70% of the controller's current rating, so 40-50 amps for a VTX-80, 60-80 amps max for Pro-120 and 70-100 amps max for 4QD-150. In most applications a smaller breaker may be used.
You will need to choose 5 items from our products, numbered below. You will have to supply only the horns and lighting and their wiring and (if you wish) the circuit breakers shown in the diagram. Click on the links for more information.
| Item | Order Code | ||
|---|---|---|---|
| 1 (controller) | VTX series | ||
| Pro series | |||
| 4QD series | |||
| 2 | RBT-810 | Reversing Bell Throttle, 24v | |
| 2a | RBT-802 | Reversing Bell Throttle 12v | |
| 3 | CLM-806 | Control lead for Pro or VTX | |
| CLM-834 | Control lead for 4QD series | ||
| 4 | HRB-324 | Horn Relay board, 24v | |
| 4a | HRB-312 | Horn Relay board, 12v | |
| 4b | HRB-424 | Horn Relay board + 4th relay, 24v | |
| 5 | Motor and battery connection 'tails' for VTX | ||
| Motor and battery connection 'tails' for Pro |