To control a turnout in a CTC-controlled railway system, it must be connected to a CTC-Turnout-Module or a CTC-IO-Module.

The following description uses a Märklin C-track turnout. It has two magnetic coils as the drive. The control of a turnout with servo motors is not considered here.

Important: This documentation was created before our decision regarding cable colors .

The cable colors in the photos do not correspond to this specification

The data sheet for the CTC-Turnout-Module can be found here: CTC-Turnout-Module . When ordering a CTC-Turnout-Module, it is necessary to specify which functions of the CTC-Turnout-Module will be used. This allows the corresponding wiring to be soldered to the CTC-Turnout-Module at the factory.

Possible factory-installed connections are shown in the data sheet:

• Track-A, Track-B: Power supply. When using Märklin C-tracks, a cable with configured plugs is attached, which is plugged into the track connections.
• W1-Green, W1-Yellow, W1-Red: Control of the magnetic coils of the turnout. When using Märklin C-tracks, a cable with a configured plug is attached so that only the plug needs to be inserted into the turnout drive.
• W2-Green, W2-Yellow, W2-Red: Control of the magnetic coils of an optional second turnout or a second turnout drive, such as in a three-way turnout. When using Märklin C-tracks with a three-way turnout, a cable with a configured plug is attached so that only the plug needs to be inserted into the turnout drive. These connections can also be used to operate the magnetic coils of a signal, as is the case with the starter set.
• IR1-GND, IR1-Vcc, IR2-GND, IR2-Vcc: Control of infrared transmitters. IRx-GND is connected to the cathode and IRx-Vcc to the anode.

The factory-soldered cables must not be subjected to any mechanical stress, as this could loosen the soldered connections on the circuit board The following image shows a module shortly before installation in a Märklin C-track turnout. It is wired as follows:

• 2 plugs for power supply. These are plugged directly into the Märklin C-track.
• Plug for turnout drive. This plug is inserted directly into the turnout drive.
• Plug for 2 IR beacons. Two IR beacons can be connected here; observe the color coding To be soldered: Cable with plug for semaphore signal. In the case of the starter set, a semaphore signal is connected here. Alternatively, a second turnout drive can also be connected.

Further installation notes:

• The Märklin turnout already has pre-fabricated small plastic nipples as an assembly aid.
• The CTC-Turnout-Module has matching holes for the plastic nipples.
• The CTC-Turnout-Module is provided with insulating tape in an area to prevent short circuits with the metal parts of the turnout.

When connecting the CTC-Turnout-Module to the turnout drive, it should be noted that the plug is mechanically keyed to prevent incorrect insertion. Care must be taken because it is a relatively small plug and can be inserted incorrectly with "brute force." The image shows a section of the CTC-Turnout-Module and the plug for the Märklin C-track turnout.

The CTC-Turnout-Module is inserted from below into the turnout at the intended location. The two plugs for the power supply and the plug for the turnout drive are also inserted. See Fig. 3: Weiche_Weichenmodul_beschriftet.jpg. Once the turnout is installed in the track layout or the power supply is connected separately, the configuration of the CTC-Turnout-Module can begin.

The configuration of a CTC-Turnout-Module is described in Chapter 4.1 of the operating instructions .

Installation images second series

The following images show the installation of the second series of the CTC-Turnout-Module, delivered from July 2021, in various Märklin C-track turnouts: