device: 7UT87 transformer protection multi- winding transformer housing type: flush mounting; BI : 31; BO: 19 (3ST + 16F + 0HS + 0P); I: 16 (protection); U: 16 ( 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, IO202, IO202, IO21 1; 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, 100 V - 230 V AC;