Optical Beam Smoke Detector

GE 

Security 

EST Fire & Life Safety 

Conventional Initiating Devices 

Overview 

The Fireray 2000 is a projected beam smoke detector designed to 

detect smoke in a large volume. The system is comprised of three 

pieces, a transmitter head, a receiver head, and a control box. The 

transmitter projects a modulated infrared light beam to the receiver. 

At the receiver, the signal is sent to the controller, where it is analyzed. 

If there is smoke in the beam path, the receiver’s signal is 

reduced by a level proportional to the density of the smoke. When 

the signal strength is reduced to a level between the obscuration 

threshold and 93% for more than 8 to 10 seconds, the fire alarm 

output relay is activated. The alarm obscuration threshold may be 

set at 25%, 35% or 50% obscuration, depending on the application. 

Reduction in signal strength below 93% is indicated as a fault 

condition. 

Standard Features 

• Coverage up to 330 ft (100m) x 50 ft (15.24m) - 16,000 ft² 

(1,524 m²) 

• Use with prism reflectors 

• Supervised 

• Automatic gain control 

• Alarm and trouble contacts 

• Controls located at convenient level 

• Wide beam angle simplifies alignment and provides stability 

• Low current consumption 

The controller is designed to mount near ground level where it is 

convenient for maintenance. The controller is powered by the fire 

alarm control panel (FACP) and returns both alarm and trouble signals 

to the FACP via relay contacts. The controller features an automatic 

gain control that automatically compensates for component 

aging, and dirt on the optical surfaces. The optional installation aid 

is used to quickly align the beam and a test card is supplied with 

each controller to perform functional tests. 

Optical Beam 

Smoke Detector 

FIRERAY 2000 

MEA 

Data Sheet 85001-0548 Issue 5 

Not to be used for installation purposes. Page of 4

Application 

Projected beam smoke detectors are ideal for large volume applications 

such as atria, warehouses, factories, churches, power stations, 

and industrial plants. Detection time depends on a number of 

factors including the location of the detectors within the protected 

area, the volume of smoke produced by the fire, roof construction 

and the ventilation arrangements. 

For flat ceiling applications, smoke typically makes its way into the 

detection beam from the point on the ceiling directly above the 

fire due to air currents and heat layering effects. At the maximum 

range of 330 ft (100m) the diameter of the beam is approximately 

10 ft (3m). For reliable detection, the maximum distance either side 

of the beam axis has been determined to be 25 ft (7.6m). Using this 

spacing yields a maximum total coverage area of 16,500 square 

feet (1,524m²). Smoke layering is overcome by mounting detectors 

such that the beam is below the heat layer and projecting into the 

smoke layer. For flat ceiling applications the system is designed to 

be mounted approximately 19 inches (482mm) below and parallel 

to the roof or ceiling. Detection time is increased in buildings with 

peaked roofs should a fire occur at the fringes of the protected 

area. No more than approximately 10 ft (3m) of the beam path 

should be within 19 in (482mm) of any wall or partition and the 

centerline of the beam. 

When access to the opposite wall is restricted or where wiring is difficult, 

the transmitter may be installed adjacent to the receiver. A prism 

is then mounted on a far wall and used to reflect the signal from the 

transmitter back to the receiver. When prisms are used, maximum 

beam length is reduced as shown in the specification table. 

Typical Wiring 

B 

Shielded cable recommended for all wiring. 

The control unit must be grounded to the power supply. 

Terminate shields outside the control cabinet at the cable 

clamp. Do NOT let shields enter the cabinet. 

Use metal junction boxes only, no plastic boxes permitted. 

Rx 

Tx 

R 

CABLE 

CLAMP 

CABLE 

CLAMP 

R 

Y 

B 

- 

+ 

+V Rx 

SIGNAL Rx 

0V Rx 

TEST 

METER 

EXTERNAL 

RESET 

Relay wiring 

as required 

SIGNAL LEVEL 

LOW 

ALARM LATCH 

COMP 

25% 

35% 

50% 

HIGH 

TROUBLE LED 

TEST/RESET 

ON OFF 

SW5 

A 

L 

A 

R 

M 

S 2 

U 4 

P V 

P d 

L c 

Y 

N/O 

N/C 

COM 

N/O 

N/C 

COM 

100 MA 

+ 

- 

T 

R 

O 

U 

B 

L 

E 

CABLE 

CLAMP 

CABLE 

CLAMP 

-VE 

(0V) 

+VE 

(24Vdc) 

May be same P.S.U. 

as for control unit 

P.S.U. (24 Vdc) 

Remote reset switch 

or relay close momentarily 

to reset 

-VE +VE 

(0V) (24Vdc) 

P.S.U. 



Specifications 

Controller 

Power Requirements 

Standby 

Alarm 

Output Relays 

Alarm 

Trouble 

LED Indicators 

Reset 

Dimensions (HxWxD) 

Weight 

Operating Environment 

Temperature 

Humidity 

Detector Heads 

Beam 

8.5 mA 

14.5 mA 

Form C rated 0.5 A @ 30 Vdc 

Form C rated 0.5 A @ 30 Vdc 

Alarm Signal High Signal Low Fault 

Configurable, manual or automatic 

10.5 in (260 mm) x 8.5 in (210 mm) x 3.5 in (89 mm) 

5 lb (2.25 kg) 

32 °F to 100 °F (0 °C to 38 °C) 

93%RH, Non-condensing 

Width 

Length 

25 ft (7.62 m) either side of transmitter centerline 

33 ft (10 m) to 330 ft (100 m) 

Alarm Threshold 

25%, 35%, or 50% obscuration 

Wiring Requirements 

Transmitter 

Receiver 

Power Requirements 

Transmitter 5 mA @ 24 Vdc 

Receiver Nominal Supplied by controller 

Dimensions (HxWxD) with 

Bracket 

3.75 in (95 mm) x 3.25 in (83 mm) x 4 in (101 mm) 

Weight with Bracket 14 oz (400 g) 

Environment 

Temperature 32 °F to 100 °F (0 °C to 38 °C) 

Humidity 93%RH, Non-condensing 

Beam Ranges using Prism(s) 

1 Prism 6.5 ft (1.98 m) to 82 ft (25 m) 

4 Prisms in a square 82 ft (25 m) to 115 ft (35 m) 

6 Prisms in a rectangle 115 ft (35 m) to 148 ft (45 m) 

2 conductor twisted-shielded, 18 AWG (0.75 mm²) 

3 conductor twisted-shielded, 18 AWG (0.75 mm²), 330 ft (100 m) max. 

Construction 

Zinc Alloy housing finished in white enamel 

Prism Dimensions (HxWxD) 4 in (100 mm) x 4 in (100mm) x 5/16 in (9 mm) 

Ordering Information 

Model Description Ship Wt., lb (kg) 

22310-18-01 Beam Smoke Detector Controller with Heads 8.5 (3.9) 

0201-01-A Beam Alignment Aid 1 (.45) 

23901-00 Prism - Beam Detector 0.3 (.14) 



GE 

Security 

U.S. 

T 888-378-2329 

F 866-503-3996 

Canada 

T 519 376 2430 

F 519 376 7258 

Asia 

T 852 2907 8108 

F 852 2142 5063 

Australia 

T 61 3 9259 4700 

F 61 3 9259 4799 

Europe 

T 32 2 725 11 20 

F 32 2 721 86 13 

Latin America 

T 305 593 4301 

F 305 593 4300 

www.gesecurity.com 

© 2006 General Electric Company 

All Rights Reserved

Optical Beam Smoke Detector

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