B-MB9
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Technical Information
The B-MB9 from TCS is an 4-function 21-pin decoder motherboard with integrated Keep Alive® on-board. The B-MB9 was designed specifically to fit the Bachmann Three-Truck Shay. Like most motherboard designs from TCS, this motherboard does include on-board Keep Alive®.
The B-MB9 has been designed to meet NMRA standards, and is compatible with any NMRA-compliant 21-pin decoder with up to 8 lighting outputs, such as TCS’ WOW121 or EU821 decoders (sold separately). This motherboard can be used with LEDs thanks to on-board resistors. See the Lighting Wiring Instructions section below for detailed instructions.
Wiring Diagram
Shown below is the latest wiring diagram for the B-MB9. This diagram depicts the "Revision 1" version of the B-MB9, which is the current production version.
The wiring diagram above uses colors for inputs, outputs, and other functions as defined in the NMRA standards for Color Coded Wires.
Lighting Wiring Instructions
Wiring Instructions for LED Lights
Perform these steps below to connect LED lighting to the motherboard:
Step 1: Connect the Anode (+) wire from the headlight(s) to any available “V+” (BLUE) pad.
Step 2: Connect the Cathode (-) wire to the F1 and F2 pads shown in the wiring diagram.
Wiring Instructions for LED Lights
Perform these steps to allow bulb support for the headlight and rear light.
Step 1: Solder the two bridges located on the bottom of the motherboard.
Step 2: Wire bulbs to the V+ and FL/RL outputs.
Previous Revision Information
None Available