Nexus Stand-Alone Parallel Positioning Integrated Fuel Air Ratio Burner Controller

The Fireye NEXUS NX6100 Integrated Controller is a microprocessor based, Flame Safeguard and Parallel Positioning Combustion Controller built into one compact, user configurable package. The system consists of the Controller, Display, Temperature / Pressure Sensors, Servo-Motors and optional Comfire Software.

The Flame Safeguard portion of the control package provides burner sequencing including safe start check, proof of main valve closure, selectable main gas safety proving sequence, supervised pre-purge, low fire starting position, pilot and main trials for ignition, main flame supervision, and post purge. Safety event timings are provided to meet North American and CE Standards. Time proven Fireye Flame Scanners and amplification circuits using UV, UV-Self Check and Infrared sensors, provide fast reliable scanning of most commonly burned fuels. For exotic fuels and applications, the NX6100 is also compatible with Fireye Phoenix and InSight integrated Flame Scanners. Seven low voltage and two line voltage user defined auxiliary inputs provide supervision of safety critical and nonsafety critical inputs. A large menu of alarm messages provides enhanced diagnostics.

Control of up to four profiles using an independent Servo-Motor for each controlled element allows precise positioning, accurate to 0.1°, of the fuel and air metering devices over the burner's firing range. Each profile can be defined to include up to 10 servomotors. Profiles can be configured to share common fuel servomotors or as independent (one profile per fuel) and are not limited by fuel. Up to 24 positions per profile including: Closed, Purge, Ignition (Preferred Start), Low Fire and an additional 20 intermediate points from low to high fire. Each individual servomotor's position and speed are verified and lockout will occur should either of these parameters be exceeded. All servomotors are controlled via secure CANbus communications link.