TPR22-BM-EX Belt Misalignment Switches


  • Ex Zone 21 and 22 Zone
  • BMC Composite Body is not oxidized
  • It is resistant to blow and heavy conditions.
  • Alarm and Stop Angle Option
  • IP68 Protection Class
  • It has CE and EAC Standards.
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TPR22-BM-EX Belt Misalignment Switches

TPR22-BM-EX Belt Misalignment Switch is a conveyor belt safety accessory designed to alarm and/or shut down conveyor systems in the event of a conveyor belt misalignment.

TPR22-BM-EX series of conveyor belt pull cord switch do not require maintenance.

Materials used:

The Body structure is made of BMC composite material. It is resistant to corrosion and explosive gas. Shaft mechanisms are made of stainless steel. The handle mechanism is cylindrical in structure and operates with two bearings.

Uses and Applications:

It is mounted on both sides of the conveyor belt to be attached to the chassis. If the belt begins to deviate, it makes contact with the roller arm causing it to spin. As more force is applied to the roller arm, it will rotate away from the normal position.

At a 15°, it will actuate the first alarm microswitch. The first microswitch will annunciate the alarm condition to the control system. If the belt continues to slip, the system is stopped by activating the second microswitch at a 35 ° position.

Safety Features:

The heavy-duty rugged design makes them suitable for most industrial applications. It can be used with only one contact mechanism without using alarm contact.

General Description:

The roller arm of the switch is placed about 15 cm away from the normal belt position.

Available modifications as per request:

-           The alarm contact structure can be added

Certifications and Standards:

The microswitch used in products is VDE approved. All KBT Electric products are produced in accordance with CE and EAC standards.

Technical Specifications

Enclosure​ BMC (Durable Composite)
Micro Switch Rating 400 VAC 6A / 230 VAC 8A / 24 VDC 10A
Output Signal (1) SPDT shutdown, alarm can be added upon request.
Cable Gland 2 x M25
Temperature Rating -30°C to +85°C
Contact Angle 25°  Alarm Model: 15° and 35°
Contact Type Snap-action
Protection Class IP6X / IP68
Enclosure Color Black (RAL 9005)
Weight 3.1 Kg
Mounting Orientation It is suitable for double-sided use.
Impact Rating IK09 (EN 62262)
Warranty Period 36 Months

Safety Standards

Electrical Safety EN 60947
Mechanical Safety EN 60204
Outdoor Safety EN 60529
Impact Resistance EN 62262
Certificates CE, EAC
Micro switches are VDE approved.


Without Reset Lever
Bus Security Interface
Custom Contact Angles
Mounting Bracket
Custom Arm Dimensions

Ex Definition

II 2D Ex tb IIIC Db T85°C        IP66/68 

Model Specifications

Model Alarm Stop Reset
NC NO Angle NC NO Angle​
TPR22-BM-EX       1 1 25° Avaible
TPR22-BM-A01-EX       1 1 25° -
TPR22-BM-A11-EX 1 1 15° 1 1 35° Avaible
TPR22-BM-A11B-EX 1 1 15° 1 1 35° -
TPR22-BM-22-EX       2 2 25° Avaible
TPR22-BM-A02-EX       2 2 25° -
TPR22-BM-33-EX       3 3 25° Avaible
TPR22-BM-A03-EX       3 3 25° -
TPR22-BM-A33-EX 1 1 15° 2 2 35° Avaible
TPR22-BM-A33B-EX 1 1 15° 2 2 35° -

Spare Parts

Model Features
KB-826-EX 1NO+1NC Switch
KB-R-01-EX M25x1,5 Cable Gland
KB-KT-01-EX M25 Blind Plug
KB-4-KN-EX 4 Pin Connector
BA-11 Mounting Bracket (Can be made in custom dimensions)
KB-TGV-01-EX Enclosure
TSR-42-BM-EX Stainless Steel Roller Arm
KB-PM-EX Reset Lever