Autonics Introduces Door Lock Switches To Boost Machine Safety

Autonics has released the new SFDL series safety door lock switches to offer enhanced protection for operators working with and near automated machinery. These latest safety switches ensure doors remain locked during hazardous operations, while also providing an easy emergency release option, a flexible five-direction key insertion design, and a durable design suitable for demanding environments. 

Autonics’ SFDL series functioning as a safety locking mechanism within a packaging machine, securing the door during operational periods. Image used courtesy of Autonics

SFDL Series Safety Door Lock Switches

Autonics’ new SFDL series of safety door lock switches is built to ensure machine doors remain locked during operations. When it comes to testing and emergency situations, the switch features a release key and a rear release button that can be used to unlock the switch manually. The rear release button can be extended from 40 mm to 100 mm with an optional bar to offer a quick and secure escape function.

The switches come in different contact configurations, including a 4-contact-connected, 4-contact not connected, 5-contact, and 6-contact, offering flexibility when it comes to the wiring needs of different control circuits.

The SFDL series head is rotatable, enabling five operation key insertion directions. Image used courtesy of Autonics

Flexible, Simple Installation and Maintenance

When it comes to installation, the SFDL series can adapt to a range of setups. The switch’s head can be rotated, enabling operation key insertion from five different directions (sides and top). Users of the new safety switch can also choose from six different actuator key types according to their operational needs to match fence and door layouts.

The safety door lock switches offer two approaches regarding wiring with their connector type and terminal type, allowing for fast installation and simplified maintenance. Customizable contact configurations are also available to meet different industrial needs. For instance, a combination of normally closed and normally open contacts can be used for both door monitoring and lock purposes.

Optional Accessories

The SFDL line is supported by additional safety accessories that enhance functionality. These optional accessories include a slide unit (SFDL-SD) that prevents accidental locks when working in a fenced area fitted with flat-type door lock switches. The group lock device (SFDL-LT/SFDL-LT2) prevents unauthorized access by physically blocking the insertion of the actuator. Extension bars offering rear release button lengths of 70 mm or 100 mm increase the flexibility in unlocking the door in emergencies and power outages.

The optional sliding unit for a fence is equipped with a flat-type door lock safety switch. Image used courtesy of Autonics

Machine Safety Design

The new SFDL series is ideal for packaging machines and other automated systems requiring safety interlocks, such as high-speed robotics and automation cells, the semiconductor industry, and CNC and metalworking machines. The switches can be used to prevent startup if machine doors are not entirely closed. By using the SFDL switches in these types of applications, doors remain locked until the machine stops completely, meeting international safety standards such as IEC 60947.

By offering secure locking, customizable key options, and durable protection against harsh environments, Autonics' new SFDL series provides a flexible solution for industries seeking to protect operators and equipment across various applications.