The 6753 is used in conjunction with the 6754 semaphore. In this illustration it is showing that the Home signal is indicating “Stop”. The yellow disk is in a vertical position and the colored lights are showing two yellow indications. If the Home semaphore was indicating “Proceed”, the yellow disk would be flipped to a horizontal position and the colored lenses would be showing two green indications.
The 6758 would show two yellows if the Home signal was indicating “Stop” and two greens.
Both of these signals are wired in parallel with the home signals. The 6753, like its home signal the 6754, has two solenoids. Since it is a distant signal, it does not have any train control wiring, which is done by the Home signal. The 6758 has green, yellow and white wires, which are connected to the same contacts as the 6759 color light signal.
German signals are more complicated than what has been discussed here. For more information, please see here.
Using the above signals with the manual control boxes allows you to manually control train movements. It is also possible to set up your railroad to have two trains operating in the same direction on the same track without colliding. The Minitrix wiring system makes this relatively easy. There are two issues:
- Train Control - The above signals can be used to control train movements. As you will see, this is easier to achieve with the semaphores than it is with the color light signals, but both approaches can be used for train control.
- Train Detection - For the signals to operate properly, there must be a way to detect the passage of trains.
For purposes of illustration, your railroad would be one large oval with two trains operating on it. When a train passes a Home signal, this signal is turned red. The following train approaches the red signal and stops. Meanwhile, up ahead, the first train passes a specific point and when it is detected, the first Home signal turns back to green and the second train starts back up again. This turns that signal back to red.
Up ahead, the first train turns the next signal red and continues on. As the second train approaches this signal, it again stops until the first train is far enough ahead, and so on. In practice, such an automated layout should be large enough to have at least four such control signals, if not more. Each insulated section at each signal must be long enough to stop a moving train. Likewise, the segments between the signals should be at least twice as long than the longest train, just so things don’t appear to be crowded.
Automated Train Detection
For layout automation to work properly, you cannot simply be standing there pushing the buttons of various 6595’s and 6594’s. Well, you can, but you’ll tire of it soon enough. So, you set up detection devices that operate the signals for you. There are several approaches.
Minitrix makes two track pieces which can be used for detection. The 14979 Contact Track works as the metal wheels of a locomotive passes over it, sending out an electrical pulse. The 14980 Contact Track uses a micro switch embedded in the track base; it is activated by a magnet placed on the bottom of the locomotive or car.
You can also use IR photocells that are manufactured by other vendors.
Automated Signal Operation
In all cases, these detection devices send out electrical impulses to operate the signals. In the case of the 6754 semaphore, these pulses can be sent directly to the solenoid coils of that signal. In the case of the color light signal, you must add a relay to both control the color lights and to turn the stopping segment of track on and off. In this way, the semaphores, although more expensive initially, are actually about the same price as the combination of the color light signal and the relay.
Each color light signal must be fitted to a relay. There are a large number of different model railroad relays out there. Trix manufactures two relays.
The 66592 is the more conventional type of relay manufactured by Minitrix, with two solenoids and a two sets of electrical contacts.