Description

The 51403645-100 SBHM is a critical safety system component from Honeywell, specifically designed as a Safety Builder High Availability Module for the Safety Manager platform. This specialized module is the hardware cornerstone for implementing fault-tolerant safety instrumented systems (SIS) and process shutdown systems. Its primary function is to provide the robust, deterministic execution environment for the user-configured safety logic, which is built using Honeywell’s Safety Builder software toolkit. The SBHM operates in tandem with redundant controllers and I/O modules to continuously monitor critical process conditions and, upon detecting a hazardous event, execute pre-programmed actions to bring the process to a safe state. The design philosophy behind the 51403645-100 SBHM emphasizes ultra-reliability, fail-safe behavior, and a high level of diagnostic coverage to detect internal faults, thereby ensuring the highest levels of functional safety and availability for the most demanding industrial applications. It is an integral part of a comprehensive solution aimed at protecting human assets, the environment, and capital equipment.

51403645-100 SBHM HONEYWELL

Technical Specifications

Parameter Name	Parameter Value
Product Model	51403645-100 SBHM
Manufacturer	Honeywell
Product Type	Safety Builder High Availability Module
Safety Integrity Level	SIL 3 (IEC 61508/61511)
Availability	>99.999%
Architecture	Dual-channel redundant (1oo2D)
Processor Type	Dedicated Safety CPU
Memory	Fault-tolerant, with cyclic redundancy check (CRC)
Diagnostic Coverage	>99%
Response Time	< 50 ms (application dependent)
Communication Interface	Dedicated Safety Network (SNET) for I/O and peer-to-peer
Integration	Experion PKS via CNet (Tricon Communication Protocol)
Operating Temperature	0°C to 60°C (32°F to 140°F)
Certifications	TÜV Rheinland certified, FM approved, CSA certified

Main Features and Advantages

The 51403645-100 SBHM is engineered with features that are essential for a high-integrity safety controller. Its most critical advantage is its TÜV-certified SIL 3 capability, providing the highest assurance level for risk reduction. The module employs a sophisticated 1oo2D (one-out-of-two with diagnostics) architecture. This means it has two parallel processing channels that constantly cross-check each other’s health and results. If a fault is detected in one channel, the module can isolate it and continue safe operation with the healthy channel, achieving exceptional fault tolerance and system availability without compromising safety.

Comprehensive built-in diagnostics are a hallmark of the SBHM. It continuously performs self-tests on its processor, memory, and communication circuits to identify latent faults before they can impact the safety function. This high diagnostic coverage is mandatory for maintaining SIL 3 integrity. Furthermore, the module features seamless integration with Honeywell’s Experion PKS distributed control system (DCS), allowing operators to view safety system status and alarms from their primary workstation. This integration, combined with the powerful Safety Builder configuration software, simplifies engineering, testing, and maintenance of the entire safety lifecycle, significantly reducing project and lifecycle costs for the end-user.

Application Field

The 51403645-100 SBHM is deployed in industries where process failures could lead to catastrophic consequences, making robust safety shutdown systems a necessity. In the Oil & Gas sector, it is used for emergency shutdown (ESD) systems on offshore platforms, in refineries for fire and gas (F&G) detection and mitigation, and for subsea production control. In chemical and petrochemical plants, the SBHM is the engine behind burner management systems (BMS) for furnaces and boilers, and for interlock systems managing high-pressure or exothermic reactions. Power generation facilities, particularly gas turbine and nuclear plants, rely on it for critical turbine trip systems and other vital safety interlocks.

It is also found in pharmaceutical manufacturing for protecting batch processes and in pulp and paper mills for safeguarding high-pressure boilers and chemical recovery areas. The application of the 51403645-100 SBHM is defined by the need for a certified, reliable, and independently operating system that can take final action to prevent a major accident, making it a foundational element of any modern asset protection strategy.

Related Products

51403644-100: A common related Safety Manager controller or communication module.

51404681-100: A typical Safety Manager Analog Input (AI) module for connecting critical process sensors.

51404682-100: A typical Safety Manager Digital Input (DI) module for receiving trip signals from the field.

51404683-100: A typical Safety Manager Digital Output (DO) module for executing shutdown actions.

51171230-100: An Experion C Series Mounting Unit used to house the Safety Manager hardware.

Safety Builder Software: The essential configuration and programming toolkit for the SBHM and the entire Safety Manager system.

Experion PKS C300 Controller: The DCS controller that integrates with the Safety Manager platform for unified operator oversight.