KIEPE ATEX IECEX Misalignment

Features

KIEPE belt misalignment switches type SLS EX are used to monitor the belt wear of conveyor belts in accordance with the requirements of EN 620. They are used to protect the system from damage or destruction in the event of belt misalignment and are installed in pairs on both sides of the upper or lower run in areas at risk. The ball-bearing roller lever made of stainless steel with large roller diameter is resistant to wear that occurs when the moving belt touches the roller. The KIEPE misalignment switches Type SLS EX are suited for use in explosive atmosphere with conductive dust, Group II, category 2 , in zone 21 and 22 (Type SLS EX 2D) or categorie 3, zone 22 (Type SLS EX 3D). The Kiepe misalignment switch Type SLS EX complies with the ATEX Directive 2014/34/EU and meets the safety objectives of the Low Voltage Directive 2014/35/EU and IECEx. KIEPE Misalignment switch Type SLS EX features a robust thermoset (BMC) housing and can be equipped with 4 force-actuated changeover contacts with snap-action function with two settable switching points.

Note: The misalignment switch must only be used in electrical control circuits.

Corrosive

Powder: Suitable
Gravel: Suitable
Rubble: Conditionally Suitable

Non-Corrosive

Powder: Suitable
Gravel: Suitable
Rubble: Conditionally Suitable

The misalignment switch type SLS EX operates when the actuating roller is approached and deflected by the misaligned conveyor belt in the direction of rotation of the roller lever. The stainless steel roller is mounted on ball bearings to reduce and absorb lateral forces and impacts. The switching angle can be set for 2 microswitches. In addition to the safety cut-out, this also enables an advance warning to be realized. When the belt is running correctly, the roller lever resets itself automatically.

Designation	Misalignment Switch Type SLS EX
Type of actuation	Bidirectional (double-side) via roller lever
Complies with	EN 60947-5-1; EN IEC 60079-31; (EN IEC 60079-0)
Suited for	Control units in accordance with DIN EN 60204-1

General

Device group / device category	II / 2D, 3D; flammable, conductive dust
Type of protection	Protection through housing
for Zone 21, 22 SLS EX II 2D	II 2D Ex tb IIIC T85°C Db IP67
for Zone 22 SLS EX II 3D	II 3D Ex tc IIIC T85°C Dc IP67
Certificates	EPS 12 ATEX 1 479 X, IECEx EPS 14.0040X

ATEX/IECEx

Enclosure	Thermoset (BMC)
Color	Enclosure – yellow (similar RAL 1004)
Actuating lever	Stainless steel; ∅ 50 mm, ball-beared roller
Deflection of roller lever (max.)	+/- 75°
Mounting	4 x M8
Weight	2.2kg

Mechanics

Switching system (max.)	4 SPDT (snap action) positive-opening switches
Switching range	2x 12,5°, adjustable +/-10° 2x 18°, fix
Cable entry (included in scope of delivery)	2 x M25 x 1,5 ; protected by red transport dummy plugs, 1x screwed cable gland: sealing area ∅ 10 mm to ∅ 17 mm; 1x dummy screw
Utilization category	AC-15: 230V ; 1,5A DC-13: 60V; 0,5A DC-13: 24V; 2A
Connection cross section (max.)	2,5 mm2
Protective conductor connection	Protection Class II / protective insulation
Potential equalization connection	at lever
Rated insulation voltage U_i	250 V
Rated impulse withstand voltage U_imp	2,5 kV, Overvoltage category II, degree of polution 3
Conventional thermal current I_th	6 A

Electrical system

Permissible ambient temperature	–25 °C …+60 °C
Extended temperature range	-40°C...+60°C
Protection rating (according to EN 60529)	IP67

Ambient conditions according to DIN EN 60947-5-5

Contact reliability at AC-15 230V, 1.5 A	>30.000 operations at 100% Ie

Reliability

The misalignment switch type SLS EX [1] is fastened to a substructure in the installation position with 4 M8 screws each. In the event of misalignment, the belt [2] must not leave the guide rollers. The actuating roller of the roller lever should preferably be approached vertically by the belt [2] in the event of misalignment. During normal operation, the actuating roller of the misalignment switch is not touched. The roller lever is replaceable and can be variable fixed on the switch axis. The electrical connection is made when the device is open via the cable gland included in the scope of delivery directly to the connection glands of the switching elements.

Important Note: To protect against electrostatic discharge, the roller lever of the SLR EX must be connected with a potential equalization connection of at least 4 mm2. The potential equalization connection is included in the scope of delivery. All potential equalization connection must be checked regularly in accordance with the operating instructions.