ZS 92 SR Extreme Belt Alignment Switch

Steute ZS 92 SR Extreme Belt Alignment Switch

• Temperature resistant from -40 °C to +85 °C
• High degree of protection IP 66 / IP 67
• Corrosion-resistant aluminium enclosure
• Screws and belt-alignment roller made of stainless steel
• With staggered contacts, adjustable from 5° to 35°
• Back and base mounting possible

Technical data

Applied standards	EN 60947-5-1
Enclosure	aluminium, corrosion-resistant, powder-coated, passivated, impact resistant, anthracite grey, similar to RAL 7016
Cover	aluminium, corrosion-resistant, powder-coated, passivated, impact resistant, signal yellow, similar to RAL 1003
Tightening torque	cover screws: max. 2.5 Nm
Degree of protection	IP 66/67 to IEC/EN 60529
B10d (10 % load)	2 million
TM	max. 20 years
Contact material	silver
Switching elements	2 NC/2 NO contacts, type Zb
Switching system	snap action, type P: positive break NC contacts
Switching points	adjustable 5° to 35°; pre-adjustment setting 2 x 10°
Connection	screw connection terminals
Cable cross-section	max. 2.5 mm² (incl. conductor ferrules)
Cable entry	2 x M25 x 1.5

Rated impulse withstand voltage Uimp	6 kV
Rated insulation voltage Ui	400 V
Conventional thermal current Ithe	4 A
Conditional short-circuit current	1100 A
Rated operating current/voltage Ie/Ue	4 A/400 VAC; 0.25 A/250 VDC; 0.55 A/125 VDC; 2.5 A/48 VDC; 3 A/24 VDC
Utilisation category	AC-15; DC-13
Short-circuit protection	4 A gG/gN fuse
Mechanical life	> 1 000 000 operations at max. 45° operating angle
Operation cycles	max. 600/h
Ambient temperature	–40 °C … +85 °C
Degree of pollution	3
Indicator lamp	as option
Approvals

Application

Belt alignment switches are suitable for applications with handling equipment. Here they are installed e.g. at both sides of a conveyor belt in order to monitor the misalignment of the belt.

Belt misalignment, evoked by, for example, goods not in the middle of conveyor belt positioned or pollution of track idlers and deflection pulleys, can without any monitoring measurements lead to damage, destruction, material covering and dropping.

Design and mode of operation

Belt misalignment switches are actuated when the conveyor belt becomes misaligned. Depending on the plant arrangements, this signal can either be used to switch the equipment off or to provide automatic correction of the belt alignment. Thus they should be installed at both sides of the conveyor belt close to the deflection and drive pulleys. In case of very long conveyor systems further belt-alignment switches must be installed. These are actuated with the misalignment of the conveyor belt. This signal can either switch the system off or start an automatic belt position correction, as well as at the same time generate an optical or acoustic indicating or warning signal.

All belt-alignment switches have positive break NC contacts and mechanical latching. At actuation the NC contacts are opened and latched mechanically. The release can be carried by push button. Thus an unintentional, automatic restart of the conveyor belt is prevented.

All belt-alignment switches bear the CE mark according to the Low Voltage Directive 2014/35/EU.