Security interlock device Emergency solenoid arrestor

rotaryelectromagnetic

Overview

Kendrion emergency solenoid arrestor is a safety locking device designed to stop robot joints and drive wheels immediately in emergency or power-failure situations. The unit pairs a linear solenoid (retractable pin) with a rotating mating profile (tooth or star wheel) so the pin engages the counterpart and arrests motion.

Function and operation

Under normal operation the pin is retracted. On emergency stop or loss of power the pin extends automatically into the rotating mating profile, preventing further rotation. Energy-optimized operation is achieved by a short over-excitation for fast insertion followed by a reduced holding voltage to maintain position.

Typical applications

• Locking of robot joints in collaborative robots (Cobots) for safe stopping
• Wheel locking for drive wheels in Automated Guided Vehicles (AGVs), e.g. autonomous forklifts

Technical highlights

• Immediate mechanical arrest on emergency stop or power loss
• Energy-efficient operation via over-excitation and reduced holding current
• High repeatability and short response times
• Compact form factor for tight integration in robot arms and vehicle drives
• Available variants to match different stroke and holding force requirements

Safety & system integration

Kendrion supplies the mechanical arrestor together with control and safety components, including CODESYS-based controllers with FSoE support and compact Safety I/O modules for secure acquisition of digital and analog signals, enabling integrated safety solutions.

Technical specifications

• Arrest principle: linear solenoid (retractable pin) with rotating mating profile (tooth/star wheel)
• Stroke (typical): approx. 8–15 mm (variant dependent)
• Transverse/shear force (typical): approx. 1,000–4,000 N (product dependent)
• Energy optimization: short over-excitation for fast insertion, reduced holding voltage in steady state
• Typical product families: Pinbrake / HU 320 series (see datasheets for details)
• Product page: https://www.kendrion.com/en/products-services/solenoids-actuators/locking-solenoids/emergency-solenoid-arrestor
• Main image: https://www.kendrion.com/fileadmin/_processed_/9/a/csm_pin-brake-agv-emergency-stopp-kendrion_fae76980a7.png