New! - Norman Equipment Co.

ZS75 INSTALLATION DETAILSPRE-TENSIONING ADJUSTMENTTo ensure positive-break operation, the switch should bepinned through the holes shown (1). The trip-wire should bepre-tensioned to the point where the linear switch actuatingcam is in the middle position (3). The standard 395N axialpulling force required for pre-tensioning can be reduced byadjusting the grooved nut (2). For trip-wire spans of less than30m, the unit can be supplied with lighter force pre-tensioningsprings.PRE-TENSIONING FORCE VS. ACTUATION FORCEThe actuating force is a function of the:• trip-wire span• pre-tensioning spring• set pre-tensioning forceas shown. Units are available with lighter springs fortrip-wire spans of less than 30m. Please seeordering details under AVAILABLE OPTIONS.4113