SIRIUS safety relay safety-related speed monitoring AC/DC 110-240 V, 45 mm spring-loaded terminal FK undelayed: 2 S FK delayed: 0 MK: 2 electrical NAMUR version Auto-start/manual start Basic device maximum achievable PL according to EN 13849-1: e maximum achievable SIL according to IEC 61508: 3 Speed monitor SIRIUS 3TK2810-1 for safe standstill and speed monitoring in machines and systems, e.g. motors. The device is suitable for all common sensors and has an adjustable release delay. With the help of simple parameterization and constant diagnostics via the display, errors can be quickly rectified at any time. Thanks to the integrated safety door monitoring, the device ensures greater safety by only releasing the system when it is in a safe state. The devices are available with different voltages and with screw or spring-loaded connections. Accessories such as connecting cables, adapters and labels make handling easier. Safety is a SIRIUS business.