Signal and indicator controller. The SIC24AD is uniquely suited to control various types of signals and indicators on a layout or a CTC panel. It can be used as a signal controller to indicate block occupancy and turnout position, and as a grade crossing gate controller with flashing signals. Combinations of some of these features are also possible. The SIC24AD is compatible with most DCC systems.
Differences from SIC24:
• "Smart Programming" has been greatly improved with additional options for easier setup.
• CVs 1 to 9 have changed to be similar to SRC16.
• Decoder Configuration CV9 has some different options. No option to support Digitrax SE8C.
• Digitrax specific - improved LocoNet® interface resulting in fewer grounding issues with LocoNet®.
• DCC to serial bus gateway option.
• Optionally can be powered from the track (HO scale or smaller).
MORE INFO
More info on TD web site (external link)

The BlocD8 is an eight block occupancy detector for DCC. It is particularly useful where high density or centrally located detection is desired. Yards and automatic train control are some examples. It provides complete isolation from the track by using transformer type sensors. The BlocD8 can used in a stand-alone mode or in a network with other devices.

The DBD22 is a dual block occupancy detector. It provides complete isolation from the track by using small transformer type sensors. This also means there is no drop in track voltage as there is with sensing diodes. The DBD22 is designed to work well with the SIC24 signal and indicator controller.
Operating voltage: 5 to 15 volts DC
Typical operating current (unoccupied): 3 mA @ 5 volts, 8 mA @ 12 volts
Typical operating current (occupied): 8 mA @ 5 volts, 20 mA @ 12 volts
Maximum load per output: 150 mA
Typical trigger current: 3 mA @ 5 volts,  6 mA @ 12 volts
Maximum sensor current: 5 A with one pass of feeder wire
MORE INFO

SC8 Servo Controller
The SC8 is a DCC compatible accessory decoder capable of driving eight servo motors . It has eight inputs for local control and 8 routes and a serial bus.
Board size: ~ 2.6" X 2.4”
• DCC compatible accessory decoder
• Controls 8 servos
• "Power Save" greatly reduces current requirements
• Programmable position, range and speed of servos
• “Speed_to_Position”
• Inputs for local control of servos
• Remote controlled routes for turnouts
• Digitrax LocoNet® compatible serial bus
• DCC gateway to serial bus

Discontinued.
DCC accessory decoder.
Controls 4 servos & 4 stall type motor switch machines.
Programmable remote control routes.
Inputs for local control of servos & motors.
"Speed_to_Position" "Smart" & "Dynamic" programming.
PR Info

Discontinued.
Includes a SMC4, four small servos, two 36" servo extension cables, hardware and linkage for the servos.
PR Info

Stationary decoder. The SMD84 is an eight (8) output DCC accessory decoder specially suited to drive switch (turnout) machines. It features * Outputs for either Twin coil solenoid switch machine or Tortoise switch machines, 13 Inputs, 8 Routes. Digitrax LocoNet compatible. Replaces SMD 82.
More Info

Discontinued, replaced by SMD84.
Stationary decoder. The SMD82 is an eight (8) output DCC accessory decoder specially suited to drive switch (turnout) machines. It features 16 remote and four local programmable routes. The SRC8 can be used with the SMD8 to provide switch position reporting (feedback) if desired.
More details at Stationary Decoder Comparison

The Switch and Route Controller (SRC16) is specially suited to control switch (turnout) machines. It has 16 inputs and 16 outputs. It can drive switch (turnout) status LEDs and low current stall motor type switch machines such as the Tortoise™. The SRC16 has eight routes.

The MotoD package includes 2 units for $19.50!
The MotoD is capable of driving four low current stall motors for switch machine applications. A SRC16 is required to control and provide voltage to the MotoD. Up to four MotoDs can be connected to a single SRC16. This means the SRC16 could control up to 16 low current stall motor type switch machines.

The TSA is a terminal strip adapter used to make easy connection to Team Digital products. It plugs directly into the the connectors on several of our products. This eliminates the need for ribbon cable and additional connections. The TSA package includes 2 terminal strip adapter boards.