RB 4400 is a universal DCC accessory decoder that can operate in three following modes: mode for controlling different types of semaphores, mode for turnout controlling (via MTB motors and/or coil drivers), and mode for controlling LED lighting and servos.

Basic functions:

· Easy configuration  via RailBOX: Railroad Control

· Supports Railcom ® protocol

· Ability to manually program the decoder using a button and a potentiometer

· Possibility to add external power supply of the decoder up to 24V voltage, which recommended to avoid excessive load on the DCC Command station

· Overload protection at all outputs

· Possibility of independent configuration of outputs within each decoder mode

· SmartLED function – status indicator that shows the status of the last switched output including semaphore signals

1. Semaphore mode: upper status LED (STS) - GREEN

a) slave mode (lower status LED (STS) is OFF): supports 4 semaphores (1-5 aspects) and 4 shunting semaphores (2 aspects, 5V output voltage)

b) slave mode (lower status LED (STS) is WHITE): supports 4 semaphores (1-5 aspects) with external triggers of a signal S1 (red)

2. Turnout mode: upper status LED (STS) - BLUE

a) slave mode (lower status LED (STS) is OFF): supports 10 motor drive outputs (MTB or coil) and 8 drive position control inputs (2 drives have no position control capability)

b) slave mode (lower status LED (STS) is WHITE): supports 10 motor drive outputs (MTB or coil) and 8 electrical turnout polarity outputs (2 drives have no ability to connect a polarized turnout)

3. LEDs and Servo mode: upper status LED (STS) - YELLOW

a) slave mode (lower status LED (STS) is OFF): supports 20 outputs for LEDs and 8 outputs for servos

b) slave mode (lower status LED (STS) is WHITE): supports 20 outputs for LEDs and 8 outputs for high voltage relays

Technical parameters:

· Decoder dimensions-88 x 104 x 22 mm.

· Power supply: 7-20 V AC / DC.

· Maximum output load-2.5 A, all outputs-5A

· Maximum 5V pin outputs load: 1A

· Resistance of a built-in output resistor for pin 1-8: 1 kOhm