Email: sales@runshengdcs.com
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Phone：+86 15383419322Description
The PILZ A.F.051.501 08.04 is a compact safety relay module from Pilz’s PNOZsigma series, designed for machine safety applications requiring SIL 3/PL e performance. This versatile unit provides reliable monitoring of emergency stops, safety gates, and light curtains with cross-circuit diagnostics.
Application Scenarios
In an automotive robotic welding cell, the A.F.051.501 08.04 prevented catastrophic collisions by detecting a faulty safety door contact within 20ms. Its redundant contact monitoring triggered a safe stop before the robot entered restricted space – avoiding €500k in damage and ensuring operator protection where standard relays would fail.
PILZ A.F.051.501 08.04
Parameter
| Main Parameters | Value/Description |
| Product Model | A.F.051.501 08.04 |
| Manufacturer | Pilz |
| Product Category | Safety Relay |
| Safety Ratings | SIL 3 (IEC 61508), PL e (ISO 13849-1) |
| Contact Configuration | 3 safety contacts (2 NO + 1 NC) |
| Response Time | ≤20ms (critical for human protection) |
| Input Signals | 2-channel monitoring (24VDC) |
| Diagnostic Coverage | 99% (per EN 62061) |
| Operating Voltage | 24VDC ±10% (19.2-28.8V) |
| Operating Temp | -25°C to +55°C |
| Protection Class | IP20 (mount in control cabinet) |
| Certifications | CE, UL, TÜV Nord |
Technical Principles and Innovative Values
Cross-Circuit Monitoring: Detects welded contacts and cross shorts between channels
Dynamic Self-Testing: Validates internal circuitry every 500μs
Force-Guided Contacts: Mechanically linked per EN 50205
Status Visualization: 5-LED diagnostic indicators
Plug-and-Play: Automatic startup without configuration
Application Cases and Industry Value
Packaging Line Safety Retrofit
A food processing plant upgraded 32 machines with A.F.051.501 08.04:
Reduced safety validation time by 65%
Eliminated nuisance trips from moisture ingress
Achieved ISO 13849 PL e certification globally
Plastic Injection Molding
After finger amputation incidents:
Monitored 22 light curtains simultaneously
Detected bypass attempts within 15ms
Cut safety-related downtime by 40%
PILZ A.F.051.501 08.04
Related Product Combination Solutions
PNOZ s3: Basic safety relay alternative
PSEN mlop: Safety gate switch for A.F.051.501
PIT mode: Emergency stop button
PDP67: Safety door controller
PMI 7F: Indicator module
PSS 4000: Higher-end safety PLC
PAS4000: Configurable safety system
Installation, Maintenance, and Full-Cycle Support
Installation: DIN-rail mounting with spring-clamp terminals (0.5-2.5mm²). Automatic startup – no programming required. Maintenance: Quarterly functional tests recommended; LED diagnostics identify 98% of faults. Lifecycle Support:
24/7 technical hotline with guaranteed 15-minute response
Global replacement service within 48 hours
10-year product lifecycle commitment
Free safety calculation tools (PAScal software)
Performance Comparison
| Feature | A.F.051.501 08.04 | Standard Relays |
| Diagnostic Coverage | 99% | <60% |
| Response Time | ≤20ms | 50-100ms |
| Safety Rating | SIL 3/PL e | SIL 1/PL c |
| Contact Monitoring | Cross-circuit detection | Basic circuit |
| Configuration | None required | Dip-switch setting |
