Siemens Cerberus Pyrotronics PB-1191 User manual

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
1
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
2
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
3
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
Scattering
Scattering
Smoke
Particles
Light Beam Absorption
Figure 3
Measuring principle of the linear smoke detector with smoke
Attenuation = Absorption + Scattering

PB-1191 Beam Detector
4
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
5
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
6
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.
44 ft.
10°
10°
Figure 7
Horizontal adjustment range of the optical system - max. 10° each side of the axis

PB-1191 Beam Detector Manual
7
5°
5°
Detector
PBA-1191
Reflector
PBR-1191
280 ft.
22 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
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
8
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
9
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.