Sick RLY3-OSSD300 Safety Relay
The RLY3-OSSD300 Sick RLY3 Safety Relay is a compact, high-performance device designed to manage safety sensor signals with OSSDs in industrial automation systems. Built for compliance, it’s ideal for machine safety applications demanding SIL 3 and PL e certified safety relays.
| Brand | Sick |
| Product Type | Safety Relay |
| Product | RLY3-OSSD300 |
Sick RLY3-OSSD300 Safety Relay – Technical Specifications
| Specification | Value |
|---|---|
| Compatible sensor types | Safety sensors with OSSDs |
| Safety integrity level | SIL 3 (IEC 61508) |
| Category | Category 4 (ISO 13849-1) |
| Performance level | PL e (ISO 13849-1) |
| TM (mission time) | 20 years (ISO 13849-1) |
| Sensor monitoring | Sequence monitoring |
| Restart interlock | ✔ |
| Reset | Automatic, Manual |
| External device monitoring (EDM) | ✔ |
| Connection type | Front connector with spring terminals |
| Inputs | 2 safety inputs,1 input for reset pushbutton or external device monitoring (EDM) |
| Outputs | 3 enabling current paths (safe), 2 application diagnostic outputs (not safe), 1 test pulse output (not safe) |
| Display elements | LEDs |
| Configuration method | Hard wired |
| Supply voltage VS | 24 V DC (16.8 V ... 30 V) |
| Residual ripple | ≤ 2.4 V |
| Power consumption | ≤ 2.5 W (DC) |
| Input voltage HIGH | 24 V DC (11 V ... 30 V) |
| Input voltage LOW | 0 V DC (–3 V ... 5 V) |
| Input current | 4 mA ... 6 mA |
| Test pulse width | ≤ 1 ms |
| Test pulse rate | ≤ 10 Hz |
| Response time | 12 ms |
| Type of output | N/O contacts, positively guided |
| Contact material | Silver alloy, gold flashed |
| Switching voltage | 10 V AC ... 230 V AC, 10 V DC ... 230 V DC |
| Switching current | 10 mA ... 6 A |
| Total current | 12 A |
| Overvoltage category | III (EN 60664-1) |
| Rated impulse withstand voltage Uimp | 6 kV (EN 60664-1) |
| Output voltage HIGH | ≥ Vs – 3 V |
| Output voltage LOW | ≤ 3 V |
| Input current (NPN) | ≤ 15 mA |
| Output current (PNP) | ≤ 120 mA |
| Output voltage | ≥ Vs – 3 V |
| Test pulse interval | 40 ms |
| Dimensions (W x H x D) | 18 mm x 124.6 mm x 85.5 mm |
| Enclosure rating | IP20 (IEC 60529) |
| Ambient operating temperature | –25 °C ... +55 °C |
| Storage temperature | –25 °C ... +70 °C |
| Air humidity | ≤ 95 %, Non-condensing |
| Interference emission | According to IEC 61000-6-4 |
| Interference resistance | According to IEC 61326-3-1, According to IEC 61000-6-2, According to IEC 60947-5-1 |
| Weight | 150 g |
Engineered for reliable operation in demanding environments, the RLY3-OSSD300 Sick RLY3 Safety Relayprovides advanced safety monitoring and switching capabilities. Designed to work with safety sensors featuring OSSDs, this relay complies with SIL 3 (IEC 61508), Category 4, and PL e (ISO 13849-1) standards, delivering exceptional system reliability with a 20-year mission time. The sequence monitoring function ensures correct signal timing from dual-channel safety sensors, enhancing fault detection and system diagnostics.
This Safety Relay features 2 safety inputs, 1 input for a reset button or external device monitoring (EDM), and 3 safe enabling current paths alongside 2 diagnostic outputs and a test pulse output. With a 12 ms response time and N/O positively guided contacts made from silver alloy, gold flashed, it provides stable and fast switching. It operates on a 24 V DC supply (16.8–30 V DC), consuming ≤ 2.5 W with low residual ripple (≤ 2.4 V), making it energy-efficient.
Electrical specifications include switching voltage ranges of 10 V AC to 230 V AC and 10 V DC to 230 V DC, with a maximum switching current of 6 A and total current of 12 A. The IP20-rated housing measures 18 mm × 124.6 mm × 85.5 mm, designed for control panels where space-saving and safety compliance are critical. The relay withstands ambient conditions from –25 °C to +55 °C and up to 95% humidity (non-condensing), ensuring durability across various industrial settings.
Certified for EMI resistance and emissions per IEC 61000-6-4 and IEC 61326-3-1, the RLY3-OSSD300 is built to perform under high-interference environments. View full specifications here or request a quote today and experience premium support with the most competitive pricing in the market.
