The FIREYE 95DSS3-1CEXSS is a highly specialized, flame safeguard and burner management system (BMS) controller, specifically engineered for demanding industrial and commercial packaged boiler/burner applications. Manufactured by Fireye, a globally recognized leader in combustion safety and controls (now part of Honeywell), this unit represents a sophisticated integration of flame supervision, burner sequence control, and safety interlocks within a single, robust housing. The primary function of the FIREYE 95DSS3-1CEXSS is to ensure the safe start-up, continuous monitoring, and orderly shutdown of single-burner combustion systems. It achieves this through a programmable logic controller (PLC) that executes a rigorous safety sequence, continuously validating critical permissives (e.g., airflow, fuel pressure) before and during burner operation. Its most critical role is the real-time monitoring of the flame via integrated ultraviolet (UV) or infrared (IR) scanner inputs, providing a failsafe response by shutting off fuel supplies within seconds of a flame failure.
This model is part of Fireye’s «Integrator» series, designed to offer enhanced flexibility and diagnostics. The FIREYE 95DSS3-1CEXSS is not a simple relay-based device; it is a microprocessor-based system that provides advanced features such as self-diagnostics, event logging, and detailed status indication via a multi-line backlit LCD display. Its value lies in its ability to prevent dangerous furnace explosions (puff-backs) by rigorously enforcing safety standards like NFPA 85/86, FM, and IRI. For operators of boilers, thermal fluid heaters, and industrial furnaces, implementing the FIREYE 95DSS3-1CEXSS means investing in a system that safeguards personnel, protects capital equipment, and ensures regulatory compliance, while its diagnostic capabilities significantly reduce troubleshooting time and unscheduled downtime.
Two (2) independent inputs, compatible with Fireye UV/IR/Visible Light scanners (e.g., C7035A, C7050A)
Fuel Valves Control
Controls up to three (3) automatic fuel valves (e.g., pilot, main 1, main 2)
Control Outputs
Multiple relay outputs for burner motor, igniter, alarms, etc. (configurable)
Inputs
Multiple analog (4-20mA/0-10V) and digital inputs for permissives (airflow, pressure, temperature switches)
Programming
Fully programmable via Fireye’s PC-85or PC-200software; 15 pre-configured standard sequences included
Display & Interface
Backlit LCD with status messages and push-button navigation for setup and diagnostics
Communication
Optional RS-485 Modbus RTU communication module for SCADA/DCS/BMS integration
Power Supply
120/240V AC, 50/60 Hz, or 24V AC/DC (specific model suffix dependent)
Operating Temperature
-20°C to +60°C
Housing Protection
NEMA 4X / IP66 rated enclosure for harsh environments
Key Features and Advantages
FIREYE 95DSS3-1CEXSS is defined by its advanced safety architecture and operational intelligence. Its core safety advantage is the use of dual, independent flame scanner inputs, which can be configured for voting logic (e.g., 1-out-of-2, 2-out-of-2) to enhance reliability and prevent nuisance shutdowns in challenging flame conditions. The microprocessor continuously executes a self-checking diagnostic routine, monitoring its own internal circuits and the integrity of the flame detection circuitry, ensuring the system fails in a safe state.
95DSS2-1
Enhanced diagnostics and user interface significantly reduce operational complexities. The backlit LCD display provides clear, plain-language status messages (e.g., «Purge in Progress,» «Flame Established,» «Low Air Flow Fault») instead of cryptic codes, allowing operators to quickly understand the burner’s status. The integrated event logger captures the last several safety shutdowns with a timestamp and reason code, which is invaluable for root cause analysis. Its programmability via PC software offers immense flexibility, allowing the FIREYE 95DSS3-1CEXSS to be tailored to complex multi-fuel (gas/oil) burners, specific purge timings, and custom interlock logic, far exceeding the capabilities of fixed-sequence timers.
Robustness and connectivity are key to its industrial application. The NEMA 4X/IP66 rated enclosure protects the electronics from water, dust, and corrosive atmospheres commonly found in boiler rooms. The availability of an optional Modbus communication module transforms the FIREYE 95DSS3-1CEXSS from a standalone safety device into a node in a plant-wide monitoring network. This enables remote monitoring of burner status, alarm acknowledgment, and even parameter adjustments from a central control room, aligning with modern industrial automation and Industry 4.0 practices for predictive maintenance and centralized operations.
Application Areas
The FIREYE 95DSS3-1CEXSS is the control brain for a wide range of industrial and large commercial combustion systems where safety and reliability are non-negotiable. Its primary application is on factory-assembled or field-erected packaged boilers used for steam generation or hot water heating in facilities such as chemical plants, refineries, food processing plants, universities, hospitals, and district heating plants. It manages the complete safe start, run, and stop sequence for these critical assets.
Beyond standard boilers, it is equally suited for thermal fluid (hot oil) heaters used in process heating applications like asphalt plants, printing presses, and composite material manufacturing. The controller’s ability to handle complex sequences makes it ideal for multi-fuel burners that can switch between natural gas, #2 oil, and heavy fuel oil, commonly found in power generation or large industrial complexes. Industrial process furnaces, such as those used in metal heat treating or ceramic kilns, also rely on the FIREYE 95DSS3-1CEXSS for safe combustion management. In essence, any single-burner application requiring a programmable, FM/IRI-approved flame safeguard system with advanced diagnostics is a candidate for this controller.
Related Products
FIREYE C7035A / C7050A: Industry-standard UV and UV/IR combination flame scanners that provide the flame signal input to the 95DSS3-1CEXSS controller.
FIREYE PC-85 or PC-200 Programming Kit: The software and communication cable required to configure, monitor, and troubleshoot the 95DSS3-1CEXSS.
FIREYE E100 / E110 Flame Amplifiers: Simpler, non-programmable flame detection modules, whereas the 95DSS3 is a full burner management controller.
FIREYE 65LM-3 / 65LM-5: Smaller, less complex programmable logic modules for simpler burners, serving as a step-down option.
FIREYE BurnerMag™ (MB-1000/2000): A magnetic flame rod system for specific gas applications, representing an alternative detection technology.
FIREYE Modbus Communication Module (95DSS3-CM): An optional plug-in card that adds RS-485 Modbus RTU capability to the 95DSS3-1CEXSS.
Honeywell/HPS Flame Safeguard Controls: Other controllers within the broader Honeywell portfolio (like the RM7895), which may serve similar functions but on different product platforms.
Fuel Valves & Actuators (e.g., Asco, Maxon): The final control elements (safety shut-off valves, butterfly valves) that are directly operated by the relay outputs of the 95DSS3-1CEXSS.
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