1. Product Overview and Safety Function
The Euchner 08443 is a high-security Coded-Magnetic Safety Switch from the proven AZM Series, designed to reliably monitor the position of guards, doors, or hatches in critical industrial safety applications. Its fundamental purpose is to prevent hazardous machine operation whenever access to a dangerous zone is possible. Unlike mechanical limit switches, the AZM 08443 operates via a non-contact magnetic principle. When the separately purchased actuator magnet (e.g., AZ16/AZ30 series) aligns correctly within the switch’s detection zone (typically 3-9mm gap distance depending on magnet), it releases the integrated mechanical locking bolt. This action changes the internal safety contact state (normally closed NC) to allow machine operation only when the guard is securely closed. The robust zinc die-cast housing provides significant resistance to tampering, vibration, and environmental stresses.
2. Critical Technical Specifications and Ratings
The AZM 08443 core unit specifies several vital parameters for safe integration. Key among these is its Safety Classification: Rated for SIL 3 (IEC 61508, IEC 62061) and PL e (ISO 13849-1), Category 4. It features 3 Safety Contacts (1 NC for safety signal + 2 N/O auxiliary contacts). Electrical ratings include 250V AC/24V DC, max. 6A (AC-15) / 4A (DC-13) switching capacity. Environmental protection is rated at IP67 (dust-tight and withstands temporary immersion), essential for harsh industrial settings like machining centers or washdown areas. Its operating temperature spans -20°C to +70°C, and it withstands high shock/vibration levels per EN 60947-5-1. Note: 08443 is a base part number; actual ordering requires suffixes for voltage (e.g., -A = 24V DC, -G = 110V AC/DC, -H = 230V AC), contact configuration, and approvals (e.g., -X1 = UL/CUL).
3. Primary Applications in Industrial Safety
This switch dominates applications demanding non-contact sensing, high tamper resistance, and robust physical security. Its primary use is safeguarding access points to hazardous machinery areas: CNC enclosures, robotic cells, press brakes, automated assembly lines, and injection molding machines. The AZM 08443 excels wherever vibration, frequent access cycles, or environmental contaminants (dust, oil, moisture) would compromise mechanical switches. It's also key for guarding systems requiring monitored interlocking doors, safety gates, or hinged access panels where mechanical wear must be minimized and coded signals prevent bypass attempts. Industries like automotive, aerospace, pharmaceutical, food processing, and heavy machinery leverage its fail-safe design for compliance with global machine safety standards (e.g., OSHA, EN ISO 14119, ANSI B11).
4. Distinct Advantages and User Benefits
Selecting the Euchner AZM 08443 delivers significant operational and safety advantages. Its coded magnetic system offers extremely high tamper resistance – generic magnets or mechanical shims cannot trigger the switch. The non-contact operation guarantees exceptionally long service life (>10 million cycles) without mechanical wear on internal components, translating to reduced maintenance and downtime costs. The positive-locking bolt mechanism ensures the guard physically cannot open until the machine is fully stopped. Standard IP67 protection allows reliable operation in dirty, wet, or high-pressure cleaning environments. Integrated status LEDs provide clear visual feedback on lock/unlock/signal states, simplifying diagnostics and reducing troubleshooting time. Euchner’s global certifications (UL, CSA, CE, TÜV) ease integration into complex safety circuits worldwide, ensuring regulatory compliance.
5. Key Functional Features and Operation
Operationally, the 08443 combines advanced magnetic sensing with mechanical locking. The unique magnetic code (detected via internal Hall sensor) ensures only the designated actuator magnet (AZ-series) can unlock it, preventing common defeat methods. Upon guard closure and magnet proximity, an electrically driven lock pin releases, confirming guard position to the safety controller. If the guard is forcibly opened while locked or power fails, the bolt forcibly blocks movement, creating positive mechanical locking force >800 N (static). The NC safety contact opens on loss of magnetic signal (guard open), triggering machine shutdown. Optional manual release keys (like SRS 1) enable authorized overrides for maintenance. Connection is via M12 plug connector (IP67-rated) or Flying Leads. The compact, robust design supports versatile flush mounting or surface mounting configurations using integrated threaded bores. Factory calibration ensures consistent trip points regardless of installation angle.
| Property | Value |
| Product Type | Safety Switch with Key Actuator |
| Model | CET-A-BWK-50X |
| Series | CET-A (Coded Safety Switch Series) |
| Safety Standard | EN ISO 14119, IEC 60947-5-1, EN 60204-1 |
| Safety Integrity Level | SIL 2 (IEC 61508), PL d (ISO 13849-1) |
| Rated Voltage | 24 V DC / 230 V AC |
| Rated Current | 4 A (resistive load) |
| Contact Configuration | 1 NO (Normally Open) / 1 NC (Normally Closed) |
| Protection Rating (IP) | IP67 (dust-tight and protected against temporary immersion) |
| Operating Temperature | -25 °C to +85 °C |
| Housing Material | Polyamide (PA) with glass fiber reinforcement |
| Actuator Type | Key Actuator (BWK denotes "With Key" for high-security access) |
| Coding Level | High Coding (prevents unauthorized access) |
| Number of Unique Codes | 100,000 (ensures low probability of code duplication) |
| Switching Frequency | ≤ 1000 operations per hour |
| Electrical Life | ≥ 1,000,000 cycles (at rated load) |
| Mechanical Life | ≥ 5,000,000 cycles (no load) |
| Dimensions (W x H x D) | 50 mm x 50 mm x 30 mm (compact design for easy installation) |
| Weight | 150 g |
| Connection Type | Cable outlet (PG 9) or optional M12 plug connector |
| Mounting | Screw mounting (M4 threads) |
| Environmental Resistance | Resistant to oils, coolants, and UV radiation |
| Certifications | CE, UL, cULus (listed under UL 508), TÜV, IECEx |
| Application | Machine safety doors, robotic cells, packaging machinery |
Packaging & Shipping
Company Information
Xiamen ZhiCheng Automation Technology Co., Ltdit is a leading global supplier of control system components. We specialize in control systems and drives.
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Euchner CET-A-BWK-50X - IP67 50mm Non-Contact - Industrial Stainless - Vibration-Resist Door Lock Sensor Images
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