Areas of applicationEvaluation units
Evaluation of individual safety sensors: Available in the Safety product range are both evaluation units that are specifically tailored to various sensor types and technologies as well as units that can be used universally. Relay models with time delays up to 3 seconds as well as up to 30 seconds are used for applications with stop category 1.Contact extensions
The contact-extension relays are suitable as simple output extensions for OSSDs and also for contact multiplication for evaluation units or safety controls.Safety relay as part of the safety function
The safety function ensures that the drive can be shut down safely at all times – when the sensor is triggered and if a fault is detected. Here, the safety-related part of a control system (SRP/CS) in accordance with ISO 13849-1 is the central component necessary for execution of a safety function. This component evaluates signals coming from the sensors, detects cross-circuits on the sensor side and faults in the contactor. It also ensures safe shutdown of the drive. A safety sensor alone cannot fulfil these tasks – safety sensors are always just part of a safety function. In the simplest case, a safety relay performs the necessary tasks. The safety function is usually triggered by a person. Here, the technology of the safety relay recognizes the signals coming from the sensor and, via the shutdown paths, disconnects the supply voltage to the contactor – and the contactor in turn disconnects the power supply to the drive.