Indo asian offers segment time switch, sul 181 h. Function: time switches with power reserve; 24-hour dial with 30 minute segments; early manual over-ride switching for on and off without influencing the subsequent programme sequence; permanent on/off switch; switching status indication; fine adjustment for time setting accurate to the minute; summer/winter time correction ± 1 hour by the bi-directional fine time adjustment facility; operating indication. Design: standard housing 45 x 54 x 60 [mm]; snapon fixing for 35 mm top-hat rail [din en 50022]; surfacemounting with additional terminal cover, tamper proofing; tamper proof operating panel protects against undesired progtramming interventions; shock protection in accordance with accident prevention regulation vbg 4; and captive terminal screws.