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The D1255RB, D1256RB and D1257RB command centers are compatible with G-Series control panels with firmware revision 7.04 or higher.
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When connected to earlier revision panels, the keypad basic functions will operate correctly but LED's for Fire, Silenced, Supervisory and Trouble will not operate correctly.
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Additionally, the D1255RB, D1256RB and D1257RB keypads are not UL listed with control panels prior to revision 7.04.