device: 6MU85 merging unit housing type: flush mounting; BI: 251; BO: 61 (51ST + 10F + 0HS + 0P); I: 12 (protection); U: 12 (standard); measuring transducer inputs: 0 (20 m A or 10 V, fast), 4 (20 m A, normal); housing width: 2 x 19"; modules in 19" row 1: IO 202, PS201, IO203, IO205, IO20 5, IO205; modules in 19" row 2: PS 203, IO211, IO230, IO230, IO23 0, IO230; LEDs/push-buttons: 16 LEDs; operation panel: integrated; key switch: without; display type: no display; front design: standard; auxiliary voltage: 60 V - 250 V DC,