New! - Norman Equipment Co.

ZS75S BidirectionalHeavy-Duty Bidirectional EmergencyCable-Pull SwitchTypical ApplicationsZS75S emergency rope-pull switches are ideal for replacingmultiple, discrete E-stop pushbuttons or achieving acontinuous, immediately accessible emergency stop. Typicalapplications include conveyor lines, textile machinery,packaging machinery, turret lathes, power plants, gravelprocessing and transfer lines.DescriptionZS75S is designed to provide a continuous emergency stopalong exposed areas of machinery and conveyors whichpresent hazards to operators/maintenance personnel. UnlikeE-stop pushbuttons, emergency stop cable-pull systems canbe actuated at any point along the “trip-wire.”The units feature positive-opening NC contact(s) which areforced open when the trip-wire is pulled. This design alsoassures machine stoppage if an operator falls into, leans on,or is pulled against the trip-wire.To comply with OSHA and other safety regulations, theZS75S features a manual mechanical reset which must beactuated before the controlled equipment can be restarted. Inaddition the switch is designed to fail-to-safe if the trip wire iscut or goes slack.Their rugged metal housing and watertight design (IP65)make them ideal for achieving a higher degree of E-stopsafety in industrial and hostile environments. An optionalsignal lamp enables distance viewing of switch status.OperationAvailable with 2 NO & 2 NC or 4 NC contacts, the ZS75S isdesigned to mount between two trip-wires.When either trip-wire is pulled, the positive-break NCcontact(s) are forced open via a direct mechanical linkagewith the actuating lever. If either trip-wire goes slack (e.g.breaks or is cut), the tension spring of the other trip wire pullsthe actuating lever — also forcing the NC contacts to open.When actuated, the switch remains latched until manuallyreset via a pushbutton or key. (An optional signal lamp is alsoavailable.)Manual reset assures the equipment cannot be restarted untilactuated.®Features & Benefits• Rugged, corrosion-resistant, die-cast aluminumhousing … tolerates the most hostile environments.• “Positive-break” NC contacts … assure circuit interruptionupon pulling of trip wire.• Watertight design … meets IP65 requirements.• Continuous E-stop protection … for trip-wire spans up to164 feet (50m).• Meets rigid safety agency standards … EN418• Available in two operating force models … for applicationcompatibility.• Mounting accessories … ease and extend installation.• Satisfies OSHA push-pull operating requirements …trips if cable is pulled or goes slack.• Signal lamp … optional lamp signals tripped and latchedcondition.AVAILABLE STANDARD MODELSPart NumberContactTypeConfigurationResetZS75S-20/2S VD 2 NO & 2 NCPushbuttonZS75S-40 VD4 NCZS75S-20/2S VS 2 NO & 2 NCKeyZS75S-40 VS4 NCNote: Pilot lamp option available for all above models.Add suffix G24 (24VDC)Part NumberPL-M25-24VPL-M25-120VSTQ441-SCSTQ441-EBSTQ441-CCSTQ441-TBSTQ441-THSTQ441-PUAVAILABLE ACCESSORIES24V Pilot light kit120V Pilot light kit5mm diameter steel cable, PVC coatedM10 eye bolt & hex nutCable clampTurnbuckleThimbleDescriptionPulley assembly (for cable “cornering”)118®is a trademark of SCHMERSALSTQ441-SS Stainless springNew!S900 Cable-pull switch wire tensioner (see page 126)For recommended installation instructions, please see page 120.