In the field of industrial automation, ensuring the continuity of processes and the safety of operators is of Paramount importance. Security interlocks are used to protect production areas from unauthorized access and ensure safe maintenance and cleaning. These devices play a key role in movable protective devices such as doors, cover plates and shields, ensuring that production processes can only be started under safe conditions. The EN ISO14119 standard specifies the requirements for movable protective devices and how to select suitable safety interlocking devices to achieve safe and economical work.

Classification of performance levels

MPM-B2153F-MJ72AA The performance rating of safety interlocks (from PLa to PLe) is a measure of the reliability of technical safety features. a performance rating from A to e describes the probability of failure within one hour. Taking PL e as an example, as the highest performance level, its failure probability per hour is about one in 20 million, it can be seen that the possibility of failure is very low to reach this performance level. For the safety interlock device, the higher the performance level, the more stringent the requirements for the system, and the high performance level of the device also requires greater locking force.

Factors to consider when choosing a safety interlock device

• Type of protective door: according to the design and function of protective door, select the corresponding safety interlock device.

Different types of protective doors require different types of safety interlocking devices. For example, for sliding doors, revolving doors and fast rolling doors, a specially designed interlock device is required to ensure the correct closing and locking of the door. In simple terms, we can divide the types of protective doors into two categories: accessible and non-accessible, as the name suggests, accessible refers to the personnel can enter the inside of the security door, while non-accessible refers to the inability to enter the inside of the security door. The smart factory that we often show at the show is a very good example of non-entry.

• Installation situation: Consider the special requirements of the installation environment, such as space limitations or access frequency.

The size of the installation space, the weight of the door, the frequency of use, and the surrounding environment (such as temperature, humidity, dust, etc.) will affect the choice of safety interlocking devices. Choosing a device suitable for these conditions ensures its reliability and durability.

• Anti-tamper protection: To ensure that the device can resist unauthorized tampering and ensure the safe operation of the device

In order to prevent unauthorized access or operators from intentionally bypassing the security system, the security interlock device should have certain tamper-proof characteristics. This usually involves physical safeguards and/or electronic locking mechanisms.

• Personnel protection and process protection

MPM-B2153F-MJ72AA Safety interlocks are selected according to their purpose, that is, to protect people from harm (personnel protection) or to protect processes from unexpected interruptions (process protection). Personnel protection often requires faster response times and a higher level of security.

In addition to the above factors, users should also consider maintenance and diagnosis, economy, certification and standards, compatibility and other factors, a comprehensive consideration of a variety of factors to ensure that the appropriate security interlock device for specific application scenarios, while ensuring safety, taking into account efficiency and economy.

Protective locking solutions from Peel Magnetic

For entry applications, the PSEN me5 lockable mechanical switch from Pielmagneto meets the requirements of the locking performance level PLd, the switch position performance level PLd (combined with the safety latch PSENbolt); PSEN slock2 Lockable non-contact switch meets the locking performance level PLc and switch position performance level PLe: PSEN mlock meets the locking performance level PLe and switch position performance level PLe.