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Summary of Contents for Det-Tronics 95-8311-02
- Page 1 Instructions 95-8311-02 UV/IR Flame Detection System R7494 Controller/C7052J Detector Detector Electronics Corporation 6901 West 110th Street • Minneapolis, Minnesota 55438 USA 5/94 95-8311-02 Tel: 612.941.5665 or 800.765.3473 • Fax: 612.829.8750...
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Page 2: Table Of Contents
Table of Contents APPLICATION ................1 List of Illustrations FEATURES................1 Figure 1 Detector Sensitivity Range ........2 SYSTEM DESCRIPTION ............2 Figure 2 Function within the Detector ......3 Detector ................2 Figure 3 Front Panel of R7494 ..........3 Feature ...............2 Figure 4 Open Controller Outputs with Transient Detector Enclosure ............3 Suppression Device Connected ......6 Controller .................3... -
Page 3: Application
• Fast response - typically 1 to 5 seconds for an intense hydrocarbon fire. • Each detector can independently register an alarm. is Detector Electronics' Trademark for its patented Optical Integrity Systems, U.S. Patent 3,952,196, United Kingdom Patent 1,534,969, Canada Patent 1,059,598. © Detector Electronics Corporation 1994 5/94 95-8311-02... -
Page 4: System Description
• Front panel LEDs indicate fire response and general bon flame which reaches the detector in pulsations or system status. “flicker.” These pulsations are present in all flames and are created by turbulent mixing of fuel with air. • Microprocessor control provides continuous diag- For this reason, electronic circuitry in the detector nostics and automatic fault identification. -
Page 5: Detector Enclosure
CONTROLLER reflective ring and is directed back through the window to the sensor. Electronic circuitry in the The R7494 is designed for use with 24 volt dc power detector then evaluates the return signal from the sen- supplies, but will operate from any direct current sup- sor and generates the appropriate output response. -
Page 6: Programming Switches
A ZONE OUTPUT LED is provided for each Automatic feature. The Zone, Fire Logic and Fire detector to indicate that a fire has been detected. Alarm outputs are de-energized. The Fault output is The LEDs blink while the zone output is active and energized, as long as no system malfunctions are latch on when the fire is no longer detected and the detected. -
Page 7: Controller Outputs
Table 1—Relationship of Zone and Status Codes System Zone Status Condition Keylock switch is in reset position, or the external inhibit being used. (Outputs inhibited, except Status Outputs.) 1 to 8 Keylock switch is in TEST position. (Outputs inhibited, except Status Outputs.) 1 to 8 o i fault - either the o i ring and/or the window of the zone indicated... -
Page 8: Figure
when the minimum number of detectors (one to +60 VDC MAXIMUM seven) connected to it and/or “upstream” controllers detect a fire. Fault output (terminal 46) and Alarm 1N4004 output (terminal 43) information is not transferred over CONTROLLER TYPICAL OPEN COLLECTOR OUTPUT the data bus and must be monitored separately when inter-controller voting is utilized. -
Page 9: Field Wiring Connector
3. The STATUS display uses numerical code to indi- a 2 foot by 2 foot JP4 fire at 100 feet and a 10 foot by cate the nature of the fault. (see Table 1). 10 foot JP4 fire at 150 feet. 4. -
Page 10: Figure
CONTROLLER TEMPERATURE RANGE— DETECTOR ENCLOSURE RATINGS— Operating: –40°F to +158°F (–40°C to +70°C) FM approved explosion-proof for Class I, Div. 1, Storage: –67°F to +170°F (–55°C to +77°C) Groups B, C and D, Class II, Div. 1, Groups E, F and G. -
Page 11: Options
OPTIONS Table 2—C7052 Typical Response Distance Fuel Distance from C7052 Power supplies are available for operating the R7494 and C7052J from line (mains) voltage. Acetone 45 feet (13.7 meters) Diesel 40 feet (12.2 meters) Q4004 Mounting Cage is designed for holding up to Gasoline 50 feet (15.2 meters) eight micro-module devices and is recommended for... -
Page 12: Blackbody Spectral Emittance
the intense UV radiation generated by the arc weld- 6000°K ing, and at distances closer than 15 feet the heated 4000°K metal from the welding can become a false alarm source for the IR sensor. 2000°K Another important fact regarding a radiation detector 1000°K of any type is that radiation must reach the detector in order for it to respond. -
Page 13: Installation
INSTALLATION The detector should not be placed where smoke can obscure its view of the hazardous area. For indoor DETECTOR POSITIONING applications, if dense smoke is expected to accumu- late at the onset of a fire, mounting the detector on a When determining the proper number and positioning side wall a few feet (1 meter) down from the ceiling of detectors needed for adequately protecting any... -
Page 14: Detector Mounting And Wiring Procedure
required to assure proper formation of the seal. The DETECTOR MOUNTING AND WIRING PROCEDURE seals should never be poured in temperatures that are below freezing, since the water in the sealing The following procedure should be used for mounting compound will freeze and the compound will not dry and wiring the C7052J. -
Page 15: Figure 11 C7052J Detector Part Identification
JUNCTION BOX JUNCTION BOX COVER MOUNTING PIN IR CONNECTOR PLUG JUMPER PLUG "J" (MUST BE REMOVED) IR SENSOR MODULE IR TEST LAMPS (2) UV TERMINAL BLOCK INDEX PIN O-RING IR SENSOR HOUSING UV SENSOR MODULE IR o i RING UV TEST LAMP OPENING O-RING UV SENSOR HOUSING UV o i RING... - Page 16 NOTE 8. Determine the proper orientation for the UV mod- Do not wire the system, or plug in or remove the ule by lining up the long index pin on the terminal sensor modules with power applied. block with the hole in the printed circuit board of the module.
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Page 17: Figure 14 Detector Terminal Block
24 VDC (A) OUTPUT SIGNAL (B) CIRCUIT GND (C) D0947 o i SIGNAL (D) EARTH GND Figure 14—Detector Terminal Block 24 VDC R7494 CONTROLLER C7052J DETECTOR – ZONE OUTPUT 1 +24 VDC ZONE OUTPUT 2 NO. 1 CIRCUIT GROUND ZONE OUTPUT 3 +24 VDC ZONE OUTPUT 4 B1 - INPUT SIGNAL... -
Page 18: Figure 16 Cover Locking Assembly (Optional)
NOTE BLIND HOLE The two lamps on the DE5500 IR sensor should be at the top or side of the detector (when viewed from the front) and the opening on the ring should be at the bottom. See Figure 10. CATCH This will ensure proper operation of the sys-... -
Page 19: Controller Installation And Wiring
24 volt batteries, a regu- fere with its line of vision. In addition, UV and/or lated dc power supply, or optional Det-Tronics volt- IR absorbing gases (Table 3) should not exist age converters. -
Page 20: Figure 20 Terminal Configuration
R7494 Terminal 44 — External Reset/Inhibit, a normally open ZONE OUTPUT 1 +24 VDC switch connected between terminal 44 and circuit ZONE OUTPUT 2 CIRCUIT GROUND ground (terminal 2) allows the controller to be reset or ZONE OUTPUT 3 +24 VDC ZONE OUTPUT 4 B1 - INPUT SIGNAL inhibited from a remote location. -
Page 21: Programming The Controller
Table 5—Relationships of SYSTEM STATUS Display PROGRAMMING THE CONTROLLER to Status Outputs The R7494 Controller is field programmable in order Front PanelDisplay Status Outputs to meet the requirements of the individual installation. Outputs This is accomplished by setting rocker switches that System Status Fault Inhibited... -
Page 22: Figure 22 Graphic Representation Of Star Logic (Typical Settings Shown)
Each rocker switch assembly contains eight separate STAR Logic Programming (System Sensitivity and rocker switches. The rockers are identified by the Time Delay) - Rocker Switches 2-1 to 2-8 (Gate numbers one through eight on one side of the assem- Length), Rocker Switches 3-1 to 3-4 (Count bly. - Page 23 mind that when the UV and IR sensors of the detector length is the value of all rockers closed, added respond to a fire, the IR sensor activates the circuitry together. If no rocker is closed, the controller will in the UV/IR detector junction box. This allows the select the minimum length (31.25 milliseconds).
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Page 24: Figure 23 Multiplication Factors
will actuate the Fire Logic output(s) only if the START pre-selected number of detectors “see” fire at the same time. When the outputs are set for latching operation, the voting process will actuate the Fire ROCKER 2–8 MULTIPLY BY 16 Logic output(s) when voting criteria have been CLOSED? met, even if a fire is not being seen by each... -
Page 25: Typical System Application
Controller is designated Master when it is first in multi- contact the Field Support Group at Det-Tronics. ple controller configuration. It is also designated Master when intercontroller voting is not used, or Power is supplied to the system by a 24 volt dc power when only a single controller is used in the system. -
Page 26: Startup Procedure
connect the detectors to the controller as shown in 2. Disable any extinguishing system connected to Figure 15. Terminals A and C (power connections) the system. are common to all the detectors in the system. The B- and D-leads of each detector are connected to their 3. -
Page 27: Figure 26 Data Bus Wiring
MASTER R7494 +24 VDC ZONE OUTPUT 1 CIRCUIT GROUND ZONE OUTPUT 2 +24 VDC ZONE OUTPUT 3 B1 - INPUT SIGNAL ZONE OUTPUT 4 B2 - INPUT SIGNAL ZONE OUTPUT 5 ZONE OUTPUT 6 B3 - INPUT SIGNAL B4 - INPUT SIGNAL ZONE OUTPUT 7 B5 - INPUT SIGNAL ZONE OUTPUT 8... -
Page 28: Bus Test Mode
Shine the UV/IR test lamp into the viewing c. ZONE OUTPUT LEDs 3 and 4 window of the detector under test. The corre- d. ZONE OUTPUT LEDs 4 and 5 sponding ZONE LED blinks. e. ZONE OUTPUT LEDs 5 and 6 f. -
Page 29: Maintenance
SENSOR MODULE REPLACEMENT PROCEDURE Det-Tronics window cleaning solution (part number To replace a defective module: 001680-001) is designed specifically for cleaning the optical surfaces of the detector. DO NOT use com- CAUTION mercial cleaners. -
Page 30: Troubleshooting
TROUBLESHOOTING the ZONE and DETECTOR indicators on the controller faceplate. The Count Test mode may be used to The Automatic feature tests all detectors in the sys- check the oi signal strength, actual signal (cps) from tem, checking window cleanliness, sensor sensitivity, a test fire, or false alarm source. -
Page 31: Device Repair And Return
Colnbrook RUSSIA Slough, Berkshire Telephone 7 (095) 135 5389 SL3 OHB Facsimile 7 (502) 222 1276 ENGLAND Telephone 01753 683059 Det-Tronics Scandinavia AB Telex 848124 GRAVIN G Box 81 Facsimile 01753 684540 S-260 83 Vejbystrand SWEDEN Telephone 431-53002/53240 Facsimile 431-52236... -
Page 32: Engineering Specifications
FM approved 3 . model R7494 Controller and the R6006 or R6007 Relay Output Module that fit in the Det-Tronics model Q4004 Mounting Rack which is designed to fit stan- An explosion-proof UV/IR test lamp shall be provided dard 19”... -
Page 33: Ordering Information
The following options can be substituted for the item RECOMMENDED SPARE PARTS in bold: Description Part Number Quantity 1 or: “in a 316 stainless steel enclosure.” (per 10 2 or: “25 mm” detectors) 3 or: “flame-proof for EEx d IIB. The device shall be rated IP66 (dust-tight/water-tight).
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