​1. Product Overview & Description​

The Euchner MGB-B-A1W2A2-PN represents a highly advanced, network-enabled electromechanical safety interlock designed for secure access control on industrial machinery with hazardous moving parts. As part of Euchner's sophisticated Modular Guarding Block (MGB) system, it integrates a powerful locking solenoid with a versatile safety controller and PROFINET communication interface directly into a single compact unit. The "B" designates the basic unit type, while "A1W2A2" specifies its sophisticated input/output configuration: one actuator input channel (A1), two OSSD safety outputs (W2), and two auxiliary feedback signals (A2). The "PN" suffix explicitly denotes integrated PROFINET connectivity with PROFIsafe capability. Its primary function is to physically bolt a guard door shut and securely monitor the lock position, only allowing release when the machine is in a safe state. This unit combines robust mechanical locking with intelligent electronic monitoring and industrial networking, facilitating centralized control and comprehensive diagnostics for modern safety systems requiring high integrity and data visibility.

​2. Key Technical Parameters & Specifications​

Critical specifications define the performance and capabilities of the MGB-B-A1W2A2-PN. It achieves the highest safety ratings, typically certified for Performance Level e (PL e) per ISO 13849-1 and Safety Integrity Level 3 (SIL 3) per IEC 61508/IEC 62061, essential for protecting personnel from severe hazards. The robust housing offers significant environmental resilience, with a standard IP65 rating ensuring reliable operation against dust and low-pressure water jets. Key electrical parameters include a wide operating voltage range (typically 24V DC nominal, 18-30V DC) and low power consumption. The integrated PROFINET interface supports PROFIsafe profiles, enabling seamless integration into safety PLC systems for high-speed communication. Mechanical specifications include a fail-secure (de-energized-to-lock) solenoid design requiring positive power for unlocking, a high holding force rating (e.g., 3000 N static holding force) ensuring door security even under vibration, and a reliable bolt monitoring sensor (position switch) integrated within the unit. Operating temperature range is typically -10°C to +55°C (mounting position dependent).

​3. Primary Applications & Intended Use​

The MGB-B-A1W2A2-PN is deployed wherever high-security, monitored physical access control with centralized safety system integration is paramount. Its primary application is safeguarding access points on high-risk machinery such as large robotic cells, metal stamping presses, plastic injection molding machines, heavy automated assembly lines, test stands, and machinery involving crushing, shearing, or high-voltage hazards. It physically prevents door opening until the machine enters a verified safe state (e.g., zero speed, zero energy), fulfilling requirements for "Access Inhibited" conditions. The integrated PROFINET/PROFIsafe capability makes it ideal for modern factories employing networked safety systems, enabling centralized status monitoring, diagnostics, and control via the plant's safety PLC. Its rugged IP65 construction suits demanding environments found in automotive, aerospace, metal fabrication, and heavy manufacturing sectors where reliability, security against tampering, and integration with higher-level control systems are critical operational and safety requirements.

​4. Distinct Advantages & Product Benefits​

Choosing the MGB-B-A1W2A2-PN offers significant advantages over conventional locking solutions. Its foremost benefit is the seamless integration of high-integrity physical locking (SIL 3 / PL e) with industrial networking (PROFINET/PROFIsafe), enabling remote diagnostics, centralized control, and streamlined safety system configuration. The integrated safety controller reduces wiring complexity compared to systems requiring separate safety relays, lowering installation costs and potential points of failure. Comprehensive diagnostics provided via the network interface (e.g., lock status, solenoid health, sensor status, actuator presence, device health) facilitate predictive maintenance and rapid troubleshooting, minimizing costly downtime. The electromechanical lock provides a fail-secure physical barrier (remains locked on power loss), offering inherent security against unauthorized access and defeat attempts. Euchner's modular ecosystem allows for easy integration with different AZ-series actuators and potential future upgrades. The combination delivers enhanced safety, improved operational efficiency through better diagnostics, and lower total cost of ownership over the product lifecycle.

​5. Core Functionality & Integrated Safety Features​

The MGB-B-A1W2A2-PN operates through a sophisticated interplay of mechanical locking, electronic monitoring, and network communication. When the guard door closes, an AZ-series actuator engages the unit, triggering a coded recognition process ("A1" input). Once verified, the solenoid mechanically bolts the door. The unit constantly monitors the bolt position internally. The dual-channel safety outputs ("W2" - OSSDs) activate only when the bolt is fully and securely locked, signaling "Guard Secured" to the machine's safety controller. To unlock, the safety PLC must initiate a release command via the PROFIsafe network only after confirming all machine hazards are safe. Upon command, power energizes the solenoid, retracting the bolt, and this unlocking action is positively detected and signaled via the auxiliary feedback outputs ("A2") and network. Crucially, the unit performs continuous self-diagnostics on internal electronics, solenoids, sensors, and wiring. Any detected fault immediately deactivates the safety outputs, triggering a safe stop. This integrated design, featuring monitored force-guided outputs and PROFIsafe communication, ensures the highest level of functional safety performance throughout its operation.