NSR22-PR-EX Pull Rope Switch

  • BMC Composite Body is not oxidized
  • ATEX Certified for Dangerous Environment
  • 2x50m Right and Left Rope Connection Distance
  • 3NO / 3NC Snap Action Contact Structure
  • IP68 Protection Class
  • It has CE and EAC Standards.
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NSR22-PR-EX Pull Rope Switch

NSR22-PR-EX Pull Rope Switches are designed for shutting down a conveyor belt or machinery and assuring system safety in hazardous environments where explosions could occur. They are also referred as "Pull Rope Switches". They are mounted alongside the conveyor belt, with tensioned steel cords attached to the switch arm from either side or both sides. When the cord is pulled, switch arm will turn until the locking angle and system shuts down. The switch can be reset manually with resetting lever.

The product is suitable for reliable long term usage in most industrial applications, thanks to its heavy-duty design. Its aluminium cast enclosure is resistant to corrosion and oxidation. Shaft mechanism is made of stainless steel and all internal parts are metal cast. NSR22-PR-EX series products do not require any maintenance.

In standard applications, cord length is 50-65 m to both sides. This distance can be lengthened upon request. All models can be equipped with an alarm switch and signal light so alarming switch can be spotted from distance. Standard product's contact structure is 1NO+1NC. If requested, 2NO+2NC and 3NO+3NC are available.

NSR22-PR-EX is Ex-Proof (ATEX certified). With its protection against dust ingress, it is reliable in explosive athmosphere. All models conform to CE (European Union) and EAC (Eurasian Customs Union) standards. Microswitches used in these products are VDE approved.

We recommend tested and approved KBT Connection Equipment for installation.

For BMC (durable composite) enclosure option, please see our product TPR22-PR-EX

Technical Specifications

Enclosure Aluminium Casting
Micro Switch Rating 400 VAC 6A / 230 VAC 8A / 24 VDC 10A
Output Signal (1) SPDT stop, alarm can be added upon request.
Cable Gland 2 x M25
Temperature Rating -30°C to +85°C
Contact Angle 25°
Rope Length 2 x 50-65 Metres
Contact Type Snap-action
Protection Class IP6X / IP68
Enclosure Color Black (RAL 9005)
Weight 2.1 Kg
Mounting Orientation It is suitable for double-sided and single- 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
Signal Light and Alarm

Ex Definition

II 2D Ex tb IIIC Db T85°C    IP66/68 

Model Specifications

Model Contact Structure Optional
NC NO Signal​ Alarm+Signal
NSR22-PR-EX 1 1 (LGT) (ALGT)
NSR22-PR-22-EX 2 2 (LGT) (ALGT)
NSR22-PR-33-EX 3 3 (LGT) (ALGT)

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-NGV-01-EX Enclosure
TSR-42-PR-EX Aluminium Rope Connection Arm
KB-PM-EX Reset Lever