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Belt Conveyor Pull Rope Switch Type HEN

APPLICATION

Kiepe pull-rope emergency stop switches type HEN are used in accordance with the requirements of EN 620 as well as BGI 710 and in conformity with DIN EN ISO 13850 as emergency stop devices as supplementary safety measures on conveyor belt systems. The pull rope is symmetrically tensioned on both sides of the red release lever.

The devices are suitable for outdoor use and applications where the ambient temperature varies considerably.

With the pull-rope system functionally aligned, the emergency stop signal can be triggered over a distance of more than 100 m up to 250m for each switch.

Kiepe pull-rope emergency stop switch types HEN comply with Machinery Directive 2006/42/EC and meet the requirements in the safety objectives of Low Voltage Directive 2006/95/EC.

They must only be used in control electrical circuits.

The HEN aluminum housing offers space for up to 3 simultaneously switching NO and NC contacts. Taking into consideration the safety data and maintenance recommendations, the pull-rope emergency stop switch type NTS can be used in safety circuits in accordance with Din En iSo 13849 up to performance level e (ple).

FUNCTION

The pull rope emergency stop switch is actuated by a pull rope 1 connected on both sides of the red release lever. The contacts are actuated by a spring supported cam disc (snap action function). At the same time, up to three NC and NO contacts are actuated simultaneously and a cross comparison of the contacts can be performed with an external control unit.

The emergency stop signal is performed with positive-opening normally closed (NC) contacts in accordance with the closed circuit principle.

After the emergency stop function is triggered, the switching mechanism is locked in the shut-off position “0”. When the blue reset lever is actuated in switch position “1”, the switching contacts are reactivated and the conveyor belt is prepared for being turned back on again. The externals springs generates the necessary force to trip the actuation lever in case of a wire break.

Note: Resetting the pull-rope emergency stop switch must not cause the conveyor system to start up.

TECHNICAL DATA

Designation: Pull-rope emergency stop switch type HEN – emergency stop device with latching function.

Type of actuation: Bidirectional; spring-loaded (“snap action”)

Complies with: DIN EN 60947-5-5; DIN EN 60947-5-1 (positive-opening contacts)

Suited for: Control units and systems in accordance with DIN EN 60204

Mechanics

Enclosure: Aluminum GK-AISi 12

Finish: 2K PU Paint, Enclosure – yellow (RAL 1004), release lever – red (RAL 3000), reset lever – blue (RAL 5010)

Mounting: 2 slotted holes for M8 screws.

Installation position: Horizontal (recommended).

Pull-rope length, approved: up to 2x 125m (dependent from design of external tension springs and max. temperature change).

Actuation force: 30 N ± 10 N

Weight: 1.7 kg.

Electrical System

Switching system: Up to 3 NC and NO contacts; cam operated positive-opening switches.

Cable entry: Threaded holes 2x M25 x 1.5 with each 1x screwed cable gland: sealing area Ø 11 mm to Ø 16 mm; 1x dummy screw.

Utilization category: 

AC-15: 230V / 6A

DC-13: 24V; 2A

Connection cross section: up to 2.5 mm2.

Protective conductor connection: In the casing; M4

Rated insulation voltage Ui: 400V

Rated impulse withstand voltage Uimp: 2.5 kV, degree of pollution III

Conventional thermal current Ith: 16A

Contact reliability: 2 million switching operations (PLC Load)

Ambient conditions in accordance with DIN EN 60947-5-5

Ambient temperature Protection: -25°C.. + 70°C

Extended ambient temperature range: –40 °C …+70 °C (type HEN 7xx)

Protection Rating: IP 67 in accordance with EN 60529

Safety data in accordance with DIN EN ISO 13849 and EN 61062

Safety functions: Emergency stop incl. latching. Manual reset.

Usable in accordance with DIN EN ISO 13849-1: Up to PLe (depending on customer application)

B10d-value: 38.000 actuation’s

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