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774400 Pilz Simulation output module
Product Dimensions：
Product Description
The PNOZ X3 is a classic electromechanical safety relay that provides a high degree of physical isolation and high current switching capacity.
| Feature | Specification |
| Safety Level | SIL 3 (IEC 61508), PL e (Cat. 4) |
| Supply Voltage | 24 V DC and 230 V AC (Dual voltage capability) |
| Safety Contacts | 3 N/O (Normally Open) |
| Auxiliary Contacts | 1 N/C (Normally Closed) |
| Semiconductor Outputs | 1 (Status monitoring) |
| Input Channels | 1-channel or 2-channel with short-circuit detection |
| Max. Switching Current | 8 A |
| Housing Width | 45 mm |
| Mounting | DIN Rail |
Key Product Advantages
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Dual Power Supply: One of the standout features of the 774400 is its ability to be powered by either 24 V DC or 230 V AC, making it highly versatile for different international power standards.
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High Switching Capacity: With an 8 A rating, it can directly control larger contactors without the need for intermediate relays.
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Redundant Internal Logic: Uses two internal relays to ensure that even if one contact welds, the safety function is maintained (monitored via the feedback loop).
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Feedback Loop: Features an S33/S34 loop for monitoring external contactors, ensuring the system cannot restart if external power components are damaged.
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Durability: The electromechanical design is highly resistant to voltage spikes and electrical noise compared to purely electronic units.
Product Applications
The PNOZ X3 is a “workhorse” found in almost every industrial sector:
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Emergency Stop Monitoring: The primary choice for E-stop buttons on standalone machines.
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Safety Gate Monitoring: Interfacing with mechanical or magnetic safety switches on machine guards.
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Light Curtains: Managing the safety outputs of Type 4 light curtains.
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Woodworking and Metalworking: Ideal for high-vibration environments like saws, lathes, and milling machines.
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Food and Beverage: Used in bottling and packaging lines where high reliability is required 24/7.
Important Usage Notes (Precautions)
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Voltage Selection: Although the unit supports both 24V and 230V, you must never apply both simultaneously. Use either the A1/A2 terminals for AC or the B1/B2 terminals for DC.
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Short-Circuit Monitoring: To detect shorts across the input cables (cross-circuit monitoring), you must use the 2-channel wiring configuration with S11/S12 and S21/S22.
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Reset Configuration: * For Manual Reset: A button must be connected between S33 and S34.
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For Automatic Reset: A jumper wire must be placed between S13 and S14.
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Auxiliary Contact: The N/C contact (31-32) is for signaling/status only (e.g., to a PLC input) and must never be used in the safety circuit.
Termination Overview
| Terminal | Function |
| A1, A2 | 230 V AC Supply Voltage |
| B1, B2 | 24 V DC Supply Voltage |
| S11, S12 | Input Channel 1 |
| S21, S22 | Input Channel 2 |
| 13-14, 23-24, 33-34 | Safe Outputs (N/O) |
| 31-32 | Auxiliary Output (N/C) |
| S33, S34 | Reset/Feedback Loop |
Shipping Port: Xiamen, China
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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