R8104 TTS Sound Decoder - Class 60

Code: BA3677
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R8104 TTS Sound Decoder - Class 60


IMPORTANT - The decoder does not support sound under DC (analogue) operation. Sounds can only be played under DCC (digital) operation. This applies to all sounds, both running and spot sounds. The locomotive's motor may be controlled under DC operation.

Function list

F0 Headlight/rearlight (if fitted to locomotive)

F1 Engine start/stop

F2 Horn low-high

F3 Horn high-low

F4 Brake squeal


F6 NOTCH down

F7 Return to IDLE

F8 Thrash

F9 Cold start override

F10 Compressor

F11 Door slam

F12 Fan

F13 Horn high low high

F14 Horn low high low

F15 Primer

F16 Slow flange squeal

F17 Spirax valve

F18 Horn low

F19 Horn high

F20 Wagons buffering

F21 Wagons clanging

F22 Coupling

F23 Guard's whistle

F24 Buffering

F25 Aux (if used in locomotive)

Hornby TTS decoder installation guide


- Supports short and long decoder addresses

- Adjustable acceleration and deceleration

- Back EMF load compensation

- Up to 19 controllable spot sounds dependent on model including whistles or horns etc

- Two sound channels allowing for simultaneous play of full locomotive engine sounds, & individual spot sounds e.g. horns, whistles, brakes, wagons coupling etc. NOTE: Only one spot sound can be played at the same time

- It is possible to alter the volume of each sound through an individual dedicated CV. Range 0-8

- Decoder is equipped to support directional front and rear lighting operation via F0 on the controller, providing that the product is fitted with lights

- The decoder is equipped with 1 aux function output controlled by F18 or F25 dependent on locomotive type (diesel or steam)

- Motor current - maximum continuous 500mA

- Motor current - peak 1amp (no function load)

- Function output current maximum—100mA (unprotected)

- Decoder current maximum continuous - 800mA (shared motor and functions)

- Number of sound channels - 2

- Termination - 8 pin plug NEM652. NMRA