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Bard 8612-049BX is an OEM alarm board with cable used in Bard solid state dual unit lead lag controller applications, including MC4002 series controllers and the AB3000-A base alarm board assembly. This control board is designed to interface alarm inputs and status signaling so building operators and service techs can identify fault conditions quickly and keep redundant wall mount systems operating as intended. If you are replacing a failed alarm board or repairing intermittent alarm reporting, match the part number exactly and confirm compatibility with your controller model and wiring setup before installation.
Bard uses suffixes like "BX" to manage parts internally. These do not change the physical form or function of the part.
A part number ending in "BX" simply means it is packaged in a box for shipping, rather than for internal assembly use.
Example: 8406-142BX is physically identical to 8406-142.