Find MTH O Gauge train control equipment for sale, including DCS systems, TIUs, WTIUs, remotes, WiFi interfaces, AIUs, transformers, and related components for controlling MTH trains and layouts.
Browse all MTH Trains, compare Model Train Control across manufacturers, or find individual Train Control Parts. Trainz can also have pre-owned and discontinued MTH control equipment for older DCS systems as inventory changes.
MTH's Digital Command System, better known as DCS, gives O Gauge operators command control over compatible locomotives and layout functions. With compatible Proto-Sound locomotives, DCS provides control over speed, direction, sound, smoke, lighting, couplers, and other functions while allowing multiple trains to be operated independently.
The important part when shopping MTH train control equipment is knowing which generation and components your railroad uses. Older DCS setups may use a TIU with a handheld remote or a TIU paired with a WIU for WiFi control, while the newer WTIU combines the track interface and WiFi capability in one unit.
The TIU, or Track Interface Unit, is a central component of the traditional MTH DCS system. The WIU, or WiFi Interface Unit, was designed to connect to an existing TIU and allow control through the MTH DCS app. The newer WTIU, or WiFi Track Interface Unit, combines the track interface with built-in WiFi.
That difference matters when replacing older MTH DCS equipment. A TIU, WIU, WTIU, handheld remote, and DCS Explorer perform different jobs, so check the exact MTH item number and the rest of your system before buying a replacement component.
The MTH Accessory Interface Unit, or AIU, extends DCS control to switches, lights, and operating accessories. It connects to a compatible TIU or WTIU, and a single AIU can control up to 10 switches and 10 accessories.
If you're adding more action around the railroad, browse MTH O Gauge Accessories for signals, operating pieces, lights, and other layout equipment that may complement your train control system.
MTH train control still needs an appropriate power supply. MTH identifies its Z-4000, Z-1000, Z-750, and Z-500 AC transformers among the power supplies that can be used with the WTIU, giving O Gauge operators several options depending on the railroad and equipment being powered.
If you're buying a used MTH transformer, check the exact model, output, cords, connectors, controls, and operating condition. A transformer supplies power while the DCS interface handles control, so they're different parts of the system.
You may not need to replace an entire MTH train control system. Sometimes the missing piece is a TIU, WIU, DCS remote, AIU, transformer, adapter, or cable needed to keep an existing O Gauge railroad operating.
Trainz buys model train collections, so pre-owned and discontinued MTH DCS equipment can return to Trainz.com after particular components become difficult to find new. With older electronics, compare item numbers, condition, included components, and compatibility with your existing DCS setup before buying.
Don't overlook the control equipment when you're getting a collection together. Trainz may buy qualifying collections that include MTH DCS components, transformers, remotes, interfaces, locomotives, and other O Gauge equipment. Not every collection qualifies, so review How It Works at Sell My Trains to see how the process works and whether your collection may be a fit.
MTH DCS stands for Digital Command System, a command-control system used to operate compatible locomotives and layout functions.
No. A TIU is the traditional Track Interface Unit, while the newer WTIU combines the track interface with built-in WiFi capability.
Yes. A compatible TIU can be paired with an MTH WIU to provide control through the MTH DCS app.
Yes. An MTH AIU connected to a compatible TIU or WTIU can provide control of switches, lights, and other accessories.
Yes. The DCS interface controls the railroad, but an appropriate power supply is still required.
Yes. Trainz.com can have discontinued TIUs, remotes, transformers, interfaces, and other MTH train control equipment as pre-owned collections come into inventory.
For train control systems across every scale and all manufacturers, browse Model Train Control. Looking for individual components instead? Explore Train Control Parts. For locomotives, rolling stock, accessories, and more across the hobby, shop all Model Trains at Trainz.
