Specifications

FlameL.1 Controllers

8/01/201152-1002-8.1
R74XX Controllers
The R7404 Controller (Spec Sheet: 90-1014) provide fast, reliable flame detection in a wide
variety of applications. The microprocessor-based controller simultaneously monitors up to
16 C7050 ultraviolet detectors in up to eight different zones. The detector has the Automatic
Optical Integrity (
o
i
) feature, providing a continuous check of detector optical surfaces,
detector sensitivity, and electronic circuitry of the detector/controller system. Selectable time
delay. (Indoor applications.)
NOTE: Check X-Series flame detector pulse retrofit options.
The STAR (Selectable Transient Arc Rejection) (Manual: 95-8294) logic program for
the R7404 Controller has been specifically designed to reject transient electric arcs, such
as those produced in electrostatic powder coating or paint spraying booths emitting UV
radiation, which can cause false actuation of a UV flame detection system. Supports up
to eight detectors in up to eight different zones using adjustable transient arc rejection
parameters. (Outdoor applications.)
• Automatic o
i
• Adjustable sensitivity and time delay
• Automatic fault identification
• Individual zone identification with eight voting options
• Latching ZONE LEDs identify the zone responding to fire
• Selectable latching or non-latching output circuits
• Individual detector output (count rate) can be measured and observed on digital display
• CSA certified
NOTE: Check X-Series flame detector pulse retrofit options.
The R7494 controller continuously monitors up to eight detectors and generates the fire alarm
in response to the detector’s fire signal. The front panel provides switches for selecting mode
of operation and initiating test functions.
• Ignores false alarm sources such as arc welding, x-rays, gamma radiation and radiation from
flickering hot objects
• Fast response–typically 1 to 5 seconds for an intense hydrocarbon fire
• Each detector independently registers an alarm
• Microprocessor control provides continuous diagnostics and automatic fault identification
• Automatic o
i
for both UV and IR sensors
• Explosion-proof (flame-proof) detector housing
• Count test mode allows monitoring of actual detector output
• Voting circuitry for improved false alarm rejection
• Up to eight controllers can be wired to provide up to 64 voting detector zones
• FM and CSA certified
NOTE: Check X-Series flame detector pulse retrofit options.