Brochure

24 • FIREYE PRIMELINE PRODUCTS
NEXUS PPC4000 SERIES FUEL AIR RATIO CONTROLER Bulletin PPC-4001
The Fireye NEXUS PPC4000 is a state of the art stand-alone parallel posi-
tioning system for all types of liquid or gaseous fuel fired combustion sys-
tems. When combined with a Fireye flame safeguard system such as the
Fireye BurnerLogix control, the PPC4000 offers the most compact and
advanced parallel positioning system available. Four fuel profiles allow the
PPC4000 to accommodate a variety of applications such as two fuels, with
and without the optional variable frequency/speed drive (VFD/VSD). With
each profile having up to 24 points entered to assure a smooth "curve", the
microprocessor interpolates points between entered values and precisely
positions fuel and air to within ± 0.1 degree. This eliminates hysteresis for
improved efficiency. The PPC4000 is capable of powering up to ten 24 volt
dc servomotors powered from the control. All servomotors and displays
operate on a secure Modbus communications protocol and can be "daisy
chained" together for simplified wiring. Two independent PID control loops
for temperature or pressure control provide precise, accurate control of fir-
ing rate for unmatched response to load changes. Ten safety rated user definable line voltage inputs are standard and can be configured for
functions such as burner on, setpoint select, lead lag, night setback, cold start thermal shock protection, etc. Built in lead lag sequencing for
up to four boilers is included in every PPC4000.
The NXD410 User Interface provides the means to setup, monitor, and display all information from the PPC4000 Control and connected
accessories. The NXD410 provides a four-line backlit LCD display screen and a multi-function tactile feel keypad. The NXD410 is panel
mounted and connects directly to the PPC4000 using Fireye cable 59-562-2.
The optional NXCESVFD plug-in daughter board provides two independent VFD/VSD channels. Each channel provides a precision 4-20 mA
output to control the VFD, a calibrated 4-20 mA input, and an encoder input for VFD positional feedback.
The optional NXCESO2 Oxygen Probe provides continuous oxygen concentration readings using Fireye's proven heated zirconium dioxide
technology. The NXCESO2 allows the PPC4000 to trim the air or fuel servo to obtain optimum combustion efficiency.
Summary of PPC4000 Features
• State of the art surface mount technology
• Small footprint: 5.0"W x 8.0"H x 4.0"D
• Capable of powering up to ten servomotors
• Two PID loops for precise process control
•" Simple four wire Modbus wiring reduces time and mistakes
• Optional NXCESVFD card provides two VFD/VSD outputs
• Optional NXCESO2 Oxygen Probe provides O2 trim
• Built in lead/lag sequencing for up to four boilers
• User interface: four line LCD display screen with multifunction keypad.
• SD (secure digital) card interface for backup and restore.
• Unparalleled worldwide support