Siemens Cerberus Pyrotronics PB-1191 Bedienungsanleitung

P/N 315-095424-3

CERBERUS PYROTRONICS™

MODEL PB-1191

Linear Smoke Detection System

Operation and Installation Manual

Cerberus Division

Siemens Building Technologies, Inc.

8 ernwood Road

lorham Park, New Jersey 07932

Siemens Building Technologies, Ltd.

50 East Pearce Street

Richmond Hill, Ontario L4B 1B7 CN

 PB-1191 Beam Detector

Overview

Figure 1

PBA-1191

Characteristics

• Microprocessor-controlled signal processing

• Suitable for surveillance ranges from 17 to 280 feet

• Operates according to the principle of light-attenuation by smoke

• Response behavior selectable In 3 sensitivity stages

• Automatic digital compensation of ambient Influences

• High immunity to extraneous light

• Transmitter and receiver installed in the same housing

• Easy installation, adjustment, and commissioning

• Two-wire installation

• Comprehensive accessories

• New diagnostic capabilities with fuzzy logic

• Efficient signal processing algorithms with application-specific characteristics

• Comprehensive EMC concept based on the latest technologies enables the detector to be

installed in difficult environments

• Integrated multi-coincidence circuit suppresses extreme electrical and optical noise signals

• Automatic and comprehensive self-test design

PB-1191 Beam Detector

Design

The PB-1191 linear smoke detector has the following components:

• Base PBB-1191 consisting of:

– Terminal support with terminals

The base housing features six PG16 tapped cable inlets.

• Detector module PBA-1191 consisting of:

– Transmitter

– Receiver

– Lens

– Electronics

Insert the plug-in detector module just prior to alignment and commissioning. Align the Iens to the

reflector by setting the adjustment on the PBL-1191.

Reflectors

Different reflectors are available for different distances:

– 17ft to 99ft Reflector foil PBR-1193 (I0 x 10cm) 1 pc.

– 99ft to 164ft Reflector foil PBR-1192 (20 x 20cm) 1 pc.

– 164ft to 214ft Reflector foil PBR-1192 (20 x 20cm) 4 pcs.

–

214ft to 262ft Reflector foil PBR-1192 (20 x 20cm) 9 pcs.

– 66ft to 280ft Prism made of glass PBR-1191 (cat's eye) 1 pc.

Short distance filter

For shorter distances between 17ft and 33ft, use an additional short distance filter as listed below:

– 17ft to 26ft PBF-1191B

– 23ft to 33ft PBF-1191A

Accessories:

• Detector heater PBH-1191 protects against condensation of the lens

Auxiliary tools:

• Detector adjustment set PBL-1191 consisting of:

– Adjustment device

– Test filter

– Target device

 PB-1191 Beam Detector

Operating principle

The transmitter (IRLED) emits an invisible infrared (IR) pulse through the transmitter lens. The IR

pulse crosses over the measuring section and reaches the reflector located opposite the detector. The

reflector deflects the IR pulse back to the point of origin. The receiver lens directs the reflected IR

pulse to a silicon photodiode. The resulting electrical signal is evaluated by the electronics.

Coverage Area

Receiver

Transmitter

Detector

PBA-1191 Reflector

PBR-1191

Figure 2

Linear smoke detector without smoke

If smoke penetrates the measuring section, part of the light beam is absorbed by the smoke particles

while another part is scattered by the smoke particles; that is, the light beams merely change direction.

The remaining light reaches the reflector. The remaining light is then reflected and once again passes

through the measuring section and is further attenuated. Thus only a small portion of the beam

reaches the receiver and the signal (Ssmoke) becomes smaller.

Scattering

Smoke

Particles

Light Beam Absorption

Figure 3

Measuring principle of the linear smoke detector with smoke

Attenuation = Absorption + Scattering

PB-1191 Beam Detector

Technical Data

Value

Parameters Symbol Unit min. typ. max. Conditions

Operating voltage UbV18 28

(quiescent)

Maximum permissible voltage Umax V30

Switch-on current IemA 2.8

Operating current IbmA 1.5 2.8

(quiescent condition)

Alarm voltage at IA= 1 ... 10mA UAV5 11

Alarm current at Ub= 24V IAmA 40 75

Reset voltage URV2 6

Reset time (UR= 2V) tRs2

Distance between detector and L FT 17 280

reflector

Response sensitivity D1Attenuation of the beam

reduced % 65 (See TABLE on page 22.)

standard % 50

increased % 30

Compensation (if beam is % 50

attenuated)

Compensation speed %/h 4

Self-test interval min. 15

Response indicator

Voltage Uie V3 6

Current Iie mA 60

Electromagnetic compatibility V/m 50 1MHx...1GHz

Operating temperature Ta

OC -25 +60

Humidity <30OC<95% rel Transient condensation

>30OC<29g/m3allowed

Storage temperature Tl

OC -30 +75

Detector heater (optional)

Supply voltage UHVDC 20 30 Regulated DC

Operating current IHmA 33 50

(maximum 1 detector per detection line)

PB-1191 Beam Detector

Design and Principle of Operation

Detector

Short Distance Filter

Response Indicator

Connector for

Adjustment Device

Knurled Screw For

Vertical Adjustment

Receiver Lens

Locking Screw

Program Switch

Detector Heater Terminal

Reed Contact (initialization)

Transmitter Lens

Knurled Screw For

Horizontal Adjustment

Sighting Device

(mirror with backsight)

Sighting device (foresight)

Locking Screw

Figure 4

The Detector

Structure of the infrared beam

The infrared beam emitted by the transmitter to the reflector is not a strictly parallel bundle of rays.

It exhibits a certain degree of scattering which makes it conical in shape. The radiation energy de-

creases as you move towards the outside edges of the beam and can be divided into the three regions:

•effective

•core

•scattered

The reflector retransmits the received light.

PB-1191 Beam Detector Manual

Detector

PBA-1191

Reflector

PBR-1191

Effective

region

Core

region

Scattered

region

Figure 5

Structure of the infrared beam

•The effective region corresponds to the ribbon connecting transmitter, reflector and receiver.

•The core region contains sufficient radiation energy to operate the system.

•The energy in the scattered region is not sufficient to ensure reliable operation of the system.

Reflector

PBR-1191

Detector

PBA-1191

280 ft.

5 ft.

Figure 6

Diameter of the core region

Alignment Possibilitites

The infrared beam can be adjusted by 10° increments horizontally and in 5° increments vertically from

the center axis. When selecting the optimum mounting location, remember that this adjustment range

can be fully used. Experience has shown that the detector and reflector should be arranged as parallel

as possible especially with distances of >162.5 feet, as this makes adjustment simpler.

Detector

PBA-1191 Reflector

PBR-1191

280 ft.

44 ft.

10°

Figure 7

Horizontal adjustment range of the optical system - max. 10° each side of the axis

PB-1191 Beam Detector Manual

5°

Detector

PBA-1191

Reflector

PBR-1191

280 ft.

22 ft.

Figure 8

Vertical adjustment range of the optical system - max. 5° above and below the axis

Note: One rotation of the knurled screw moves the beam at 280 ft. approximately 3 ¾ ft.

Reflectors

Retroreflectors reflect the received light beam in parallel to the latter. For this reason the retroreflector

does not have to be installed parallel to the detector. Also vibrations and distortions of the reflector

mounting wall do not cause any problems. Another advantage is that any extraneous light is also

reflected in its own direction and consequently does not reach the receiver.

Reflector max. + 20°

max. + 20°

Reflector

Figure 9

The reflector can be mounted inclined a maximum of ± 20Oin all directions

PBR-1191 prism

The retroreflecting prism has the shape of a pyramid whose lateral faces are formed by isosceles

orthogonal triangles. Light beams entering through the base are completely reflected twice on the

lateral faces and reflected back through the base.

The prism is installed in a housing that is identical to the one used for the detector base. The reflector

is equipped with a reflector heater. If condensation is possible, connect the heater to a 24V supply.

PB-1191 Beam Detector Manual

Light beam

Figure 10

PBR-1191 reflector and reflection principle

PBR-1192, PBR-1193 reflector

This reflector consists of microprismatic elements that are formed by transparent, synthetic resin

sealed to a plastic substrate.

Compatibility

COMPATIBLE EQUIPMENT

System Zone

Module

System - 3 ZB-35

MXL CZM-4

MXL-IQ CZM-4

PXL PCM-1

PZE-4B

SXL-EX SZE-4X

PB-1191 Beam Detector Manual

Planning

Fundamentals of planning

The linear smoke detector PBA-1191 is ideal for certain applications. Use it to supplement or replace

point-type smoke detectors. Refer to the Fields of Use table for suitable applications.

FIELDS OF USE

Very Suitable: Suitable:

Large and high halls

Aircraft hangars

Cable and energy ducts

Churches

Buildings with artwork ceilings of historical interest

Rooms with complex ceiling sructures

Rooms with strong air currents

Heavy soiling of point detectors (textile and wood processing)

Monitoring at different levels

Expensive installation and maintenance of point detectors,

for example:

-- in sawtooth roofs

-- very high rooms

-- where point detectors would have to be

suspended at a lower level

Underground garages >9ft high (min)

Computer rooms

Under floor

Above ceiling

Corridors

Inner courtyards (malls)

Open-plan offices

Cross zone releasing appliances

In combination with flame detectors

Operating conditions

The distance between the PBA-1191 and the reflector must be between 17 ft and 280 ft.

- There must be a permanent line of vision between the PBA-1191 and the reflector. Care should

be taken to ensure that the IR beam is not interrupted by moving objects such as overhead

cranes, etc., which can lead to trouble signals.

- If point detectors cannot be used because of the interfering effects of smoke, steam, or dust,

note that the PBA-1191 will only solve the problem in certain cases.

- Avoid frontal incidence of sunlight, light from halogen lamps, etc. on the PBA-1191.

- Always mount the PBA-1191 in the vicinity of the ceiling (See Figure 11 for distances). The

detector placement must not be too close to or too far from the ceiling.

- The PBA-1191 is also suitable for very high rooms. As a supplementary measure, install

additional PBA-1191s at different levels and/or use additional flame detectors.

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