The Pilz 751103 is a compact safety relay manufactured by Pilz GmbH, Germany. It belongs to the PNOZsigma series, specifically the PNOZ s3 C model.
It is primarily used in industrial automation safety control systems and is a core component in building control loops that meet safety standards.
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Core Features
- ✓ Real-time Safety Monitoring Device: Its core task is to continuously receive and monitor input signals from various safety sensors, including emergency stop buttons, safety door switches, and photoelectric protection devices (light curtains). Once these safety devices are triggered (e.g., someone enters a dangerous area or the emergency stop button is activated), it immediately senses the signal change.
- ✓ Redundant Logic Judgment and Fault Prevention: It doesn't simply transmit signals; instead, it performs logical judgments through an internal dual-channel monitoring mechanism and a forced-guided contact structure.
- ✓ Reliable Power Cut-off: When a danger signal is detected or a safety fault occurs, it decisively cuts off the equipment's power supply at extremely high speed through its safety output contacts (2 normally open contacts + 1 semiconductor safety output), immediately stopping the machine and ensuring the safety of personnel and equipment.
- ✓ Preventing Unexpected Restart: fter the emergency stop is lifted or the safety door is closed, it will not allow the machine to restart automatically. A dedicated reset operation (supporting manual or automatic start modes) is required to confirm that safety conditions have been fully restored before allowing the equipment to resume operation.
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Technical Specifications
| Brand |
Pilz |
| Model / Part Number |
PNOZ s3 C 24VDC 2 n/o |
| Material Number (MNR) |
751103 |
| Product Type |
Safety relay |
| GTIN |
4046548025552 |
| Supply Voltage |
24 V DC |
| Safety Output Contacts |
2 normally open safety contacts (2 N/O) + 1 semiconductor safety output (1 SC) |
| Physical Dimensions (Width) |
17.5 mm |
| Terminal Type |
Spring-clamped terminal |
| Safety Standard Rating |
Complies with EN ISO 13849-1 standard PLC class requirements |
Frequently Asked Questions
Q: How fast is the response time of this relay?
A: This Pilz 751103 (PNOZ s3 C) safety relay has an extremely fast response time, with the time from the input signal disconnection to the output contact opening ≤ 15 milliseconds (ms).
Q: What are its specific application scenarios?
A: The Pilz 751103 (PNOZ s3 C) has a wide range of applications. It can be used as a core safety control component for any industrial machinery that needs to ensure the safety of personnel and equipment through emergency stops, safety doors, or light curtains.
Q: Can this relay monitor several security devices simultaneously?
A: The Pilz 751103 (PNOZ s3 C) safety relay cannot monitor multiple different security devices simultaneously; it can only focus on monitoring "one" security function at a time.
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