SICK i110-RA313 Safety Limit Switch Roller Arm

SICK i110-RA313 is an electro‑mechanical safety switch with a roller‑arm actuator designed for guarding and safety interlocks on machines. It provides 3 normally closed (NC) contacts and 1 normally open (NO) contact, enabling multi‑point safety control in a single unit. The device supports four actuation directions with a roller‑arm, an actuation torque of at least 0.34 Nm, and an actuation frequency up to 6,000 cycles per hour, with an approach speed range of 0.1 to 15 m/min and a positive break angle of 44°. Safety data include a 2 × 10^6 switching cycle rating under small load, EN ISO 14119 Type 1 with an uncoded actuator, and no internal fault detection—the safe state in a fault must be provided by the connected safety logic unit. Wiring uses a cable gland (M20) and accepts conductors up to 2.5 mm². Electrical data specify AC-15/DC-13 usage with a rated operating current of 3 A at 240 V AC or 24 V DC, rated insulation voltage 250 V, impulse withstand voltage 2,500 V AC, and short-circuit protection F152. The i110-RA313 belongs to SICK’s i110R safety‑switch family and is commonly used to monitor guards on automation lines where the roller‑arm engages the safety circuit when the guard is opened.