MC 2 EXPANSION BOARD -- OEM MC 2SE -- OEM MCH2000000 MCH2000000, (mC2 panel version MCH2000001 OBSOLETE, REPLACEMENT BY MCH2001030!!!; MCH2000010 MCH2000020, (I/O expansion board for the secondcircuit (female connectors included)) MCH2001030 MCH2001030, ; MCH2001030. "MCH2001030 MCH2001030 MCHILER 2 MCHSML000M- old code, MCH2000000- new code;Controller for refrigeration machine MCHSML0010 - obsolete, replaced by MCH2000000; MCHSMLCAB0