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The Schneider AS5B40002A delivers fail-safe processing for critical industrial safety applications. This Quantum safety processor utilizes dual-channel redundant architecture for SIL3 certification compliance.

Key Technical Specifications

Dual-Channel Redundant Architecture

The Schneider AS5B40002A employs two independent processing channels operating in lockstep synchrony. Each channel continuously compares execution results with the other, detecting any discrepancy immediately.

This 1002 architecture achieves SIL3 certification without requiring external safety relays or watchdog timers. The processor automatically initiates a safe state upon detecting any internal fault.

Safety Memory Configuration

This safety processor provides 64K words of user program memory exclusively for safety-related logic. The memory utilizes error-correcting code technology to detect and correct single-bit faults.

Dual-ported memory architecture allows both processing channels simultaneous access. Each channel reads and writes independently while hardware comparators verify consistency.

Comprehensive Diagnostic Coverage

Built-in self-tests achieve greater than 99% diagnostic coverage of all critical components. The AS5B40002A tests CPU registers, memory arrays, bus interfaces, and I/O drivers continuously during normal operation.

The processor completes a full instruction set test every 100 ms. Any detected fault forces all safety outputs to their predetermined safe state within 50 ms.

Multiple Communication Interfaces

Three independent communication ports provide flexible system integration. Two Modbus Plus ports connect to standard Quantum controllers for non-safe data exchange and coordination.

A dedicated USB programming port enables direct connection to Unity Pro Safety software. This isolated port maintains separation between safety programming and operational networks.

Mechanical Design and Form Factor

Weighing approximately 0.95 kg, this safety processor occupies a single slot in Quantum safety racks. Its dimensions of 270 mm x 115 mm x 45 mm accommodate the dual-processor architecture within standard module footprint.

The front panel includes seven LED indicators displaying processor health, channel status, network activity, and system safe state. Green, amber, and red LEDs provide immediate visual confirmation of operational mode.

System Integration with Quantum Safety I/O

The AS5B40002A interfaces exclusively with Quantum safety I/O modules including 140SDI safety digital input and 140SDO safety digital output series. These modules feature internal redundancy and diagnostic feedback paths.

Standard Quantum I/O modules reside in the same rack but connect through the non-safe bus segment. This hybrid architecture maximizes safety integrity while maintaining economic efficiency for non-critical functions.

Certified Safety Function Library

Schneider provides TÜV-certified function blocks for common safety applications. Pre-approved logic includes emergency stop monitoring, safety mat integration, light curtain interfacing, and two-hand control.

Engineers drag these certified blocks directly into safety application programs. This approach eliminates manual validation of standard safety functions, significantly reducing project certification effort.

Energy Storage and Program Retention

A field-replaceable lithium battery maintains program memory during power-down periods. Typical battery service life reaches five years under normal operating conditions.

The AS5B40002A retains complete safety application programs for a minimum of 90 days without main power. This extended retention accommodates lengthy plant shutdowns without reprogramming requirements.

Application Versatility

Process industries deploy the Schneider AS5B40002A across numerous safety instrumented system applications. Typical implementations include burner management, emergency shutdown systems, high-integrity pressure protection, and turbine overspeed protection.

The SIL3 rating qualifies this processor for the most demanding risk reduction requirements. Manufacturers achieve overall risk reduction factors exceeding 1000:1 using Quantum safety architecture.

Programming and Certification Environment

Unity Pro Safety software provides IEC 61131-3 programming languages specifically for safety applications. The environment includes version control, electronic signatures, and mandatory audit trail features required by functional safety standards.

All safety program modifications require two-person authorization with password authentication. The system records every change with timestamp, user identification, and approval documentation.

Compliance and Standards Certification

TÜV Rheinland certifies the AS5B40002A for use in applications up to SIL3 per IEC 61508 and IEC 61511. The certification encompasses both hardware and embedded firmware components.

Additional certifications include NFPA 85 for burner management and API 14C for offshore production platforms. This comprehensive approval suite addresses diverse industry safety requirements.

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