Description 3 removable, lockable screw-type connectors. 1 20-pin connector for 9 logic inputs: b Ix01 to Ix04: 4 independent logic inputs b Ix05 to Ix09: 5 common point logic inputs. 2 7-pin connector for 5 common point logic inputs Ix10 à Ix14. 3 17-pin connector for 6 relay outputs: b Ox01: 1 control relay output b Ox02 to Ox06 : 5 indication relay outputs. Addressing of MES120 module inputs / outputs: b x = 1 for the module connected to H1 b x = 2 for the module connected to H2 b x = 3 for the module connected to H3. 4 MES120G, MES120H identification label (MES120 modules have no labels).