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Safety Standstill Monitor SIL 3 | Category 4 Compliance | 20 Years Mission Time | by SICK
The Safety Standstill Monitor SIL 3 is designed for industrial machinery safety monitoring, ensuring compliance with Category 4 standards. With a mission time of 20 years and a mean probability of dangerous failure per hour (PFHD) of 41 x 10^-9, it provides reliable motor standstill detection. Ideal for safety control systems, this device enhances machine safety and reduces the risk of accidents.
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Technical Specifications
- Safety integrity level: SIL 3 (IEC 61508)
- Category: Category 4 (EN ISO 13849)
- Performance level: PL e (EN ISO 13849)
- PFHD: 41 x 10^-9 (EN ISO 13849)
- Mission time: 20 years
- Stop category: 1 (EN 60204-1)
- Connection type: Screw-type terminals, plug-in screw-type terminals
- Conductor cross section: 0.5 mm² to 2.5 mm²
- Encoder interface: Motor voltage measuring
- Supply voltage (A1/A2): 230 V AC (184 V to 253 V), 10% residual ripple
- Max power consumption: ≤ 6 VA
- Diagnostic output supply voltage (A3/A4): 24 V DC (11 V to 30 V), 10% residual ripple
- Measured motor voltage: ≤ 690 V AC (≤ 600 V AC for UL 508 applications)
- Voltage threshold Uan: 20 mV to 400 mV, adjustable
- Standstill time ts: 0.2 s to 6 s, adjustable
- Response time: ≤ 100 ms
- Safety outputs: 3 NO contacts, 1 NC contact, relay positively guided
- Nominal switching voltage: 250 V AC
- Switching capacity AC 15: NO 3 A/230 V AC, NC 1 A/230 V AC
- Switching capacity DC 13: 1 A/24 V DC
- Max switching frequency: ≤ 1200 per hour
- Contact service life: ≥ 200,000 switching operations at 230 V / 5 A
- Mechanical life: ≥ 50 million switching operations
- Semiconductor diagnostic outputs: Electrically isolated, short-circuit protected, max 100 mA
- Signal contacts 53/54: 3 A/250 V AC
- Mounting: 35 mm mounting rail (EN 60715)
- Enclosure rating: Housing IP40, Terminals IP20 (EN 60529)
- Climate conditions: 25/060/04 (EN 60068-1)
- Vibration resistance: 10 Hz to 55 Hz (EN 60068-2-6)
- Shock resistance: Single shock 30 g, 11 ms (EN 60068-2-27)
- Dimensions (H x L x W): 112mm x 121mm x 45mm
- Weight: 0.4 kg
Key Features
- Safety integrity level SIL 3 (IEC 61508)
- Category 4 (EN ISO 13849) and Performance level PL e
- Mean probability of dangerous failure per hour (PFHD) 41 x 10^-9
- 20 years mission time
- Stop category 1 (EN 60204-1)
- Drive safety function: Standstill detection
- Connection via screw-type terminals and plug-in screw-type terminals
- Motor voltage measuring encoder interface
- Supply voltage 230 V AC with 10% residual ripple
- Semiconductor diagnostic outputs supply voltage 24 V DC
- Relay safety outputs with 3 normally open and 1 normally closed contacts
- Mechanical life of ≥ 50 million switching operations
- Mounting on 35 mm rail according to EN 60715
- Enclosure rating IP40 housing, IP20 terminals
Professional Installation Requirements
- Installation must be performed by a qualified electrician or safety technician familiar with industrial safety standards and electrical wiring regulations.
Applications
- Industrial machinery safety monitoring
- Drive safety functions for motor standstill detection
- Safety control systems requiring SIL 3 and Category 4 compliance
Standards & Compliance
- AS/NZS 4801 – Occupational Health & Safety Management Systems
Environmental Benefits
- Enhances machine safety reducing risk of accidents and associated environmental hazards
- Long service life reduces waste and replacement frequency
Warranty Information
Standard manufacturer warranty applies; please refer to SICK for specific warranty terms.
Available Now
The SICK MOC3ZA-KAZ33A3 Safety-Related Standstill Monitor is available for immediate purchase, ideal for industrial safety applications requiring high integrity motor standstill monitoring.
