Difference between safety light curtain and safety relay

Safety light curtain and safety relay are two common safety protection devices, they are used for the safety protection of machinery and equipment, but there are differences in application scenarios, functional characteristics and other aspects. The following is the analysis of the difference between them.

Difference between safety light curtain and safety relay

1. Detection method different: the detection method of the safety light curtain is mainly based on the photoelectric principle, through the light beam of the blockage to determine whether the machine is working; while the safety relay is through the induction of mechanical position or electrical signal changes to achieve safety protection.

2. Response speed difference: the reaction speed of the safety light curtain is generally faster, can achieve milliseconds response time; while the reaction speed of the safety relay is relatively slow, generally need tens of milliseconds to a few seconds of response time.

3.Installation difference: the installation of safety light curtains is more flexible, according to the actual needs of different installation methods; while the safety relay usually needs to be installed in accordance with the standard installation methods to ensure the function and safety performance of the relay.

4. Detection range difference: the detection range of the safety light curtain is generally smaller, mainly used for the protection of a specific area; while the safety relay can realize the safety protection of the whole area.

5.Safety performance difference: safety grating in the protection range when there is a cover, can realize the rapid shutdown protection; and safety relay needs to be in the machine and equipment in the occurrence of dangerous situations for switching control, there is a certain degree of security risks.

6. Functional characteristics difference: safety grating usually has high sensitivity, easy to install, high reliability, etc.; and safety relay usually has more control functions, wide range of application and other characteristics.

In summary

Safety light curtain and safety relay in the application scene, detection mode, response speed, installation, detection range, safety performance and functional characteristics of the differences. In the actual use of the process needs to be based on specific machine equipment, safety protection needs and other factors to consider, choose the right safety protection device to ensure the safe operation of the machine.