device: 7SS85 busbar protection 2 zones, 4 fields included, T rAbb housing type: flush mounting; BI: 23; BO: 21 (3ST + 18F + 0HS + 0P); I: 28 (protection); U: 0 ( standard); measuring transducer inputs: 0 (20 m A or 10 V, fast), 0 (20 m A, normal); housing width: 5/6 x 19''; modules in 19" row 1: IO 203, PS201, IO201, IO203, IO20 3; modules in 19" row 2: ; LEDs/push-buttons: 16 LEDs; operation panel: integrated; key switch: without; display type: large display; front design: standard; auxiliary voltage: 60 V - 250 V DC,