Siemens OH720 User manual

OH720, OP720, HI720, HI722
Automatic fire detectors
Technical Manual
A6V10212047_m_en_--
Building Technologies
2015
-05-04 Control Products and Systems

Legal notice
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Legal notice
Technical specifications and availability subject to change without notice.
Transmittal, reproduction, dissemination and/or editing of this document as well as
utilization of its contents and communication thereof to others without express
authorization are prohibited. Offenders will be held liable for payment of damages.
All rights created by patent grant or registration of a utility model or design patent
are reserved.
Issued by:
Siemens Switzerland Ltd.
Building Technologies Division
International Headquarters
Gubelstrasse 22
CH-6301 Zug
Tel. [phone]
www.siemens.com/buildingtechnologies
Edition: 2015-05-04
Document ID: A6V10212047_m_en_--
© Siemens Switzerland Ltd, 2008

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Table of contents
1 About this document ................................................................................... 5
1.1 Applicable documents .....................................................................................7
1.2 Download center .............................................................................................7
1.3 Technical terms ...............................................................................................7
1.4 History of changes...........................................................................................8
2 Safety ....................................................................................................... 10
2.1 Safety instructions .........................................................................................10
2.2 Safety regulations for the method of operation .............................................12
2.3 Standards and directives complied with........................................................14
2.4 Release Notes...............................................................................................14
3 Structure and function............................................................................... 15
3.1 Overview .......................................................................................................15
3.1.1 Details for ordering ........................................................................15
3.1.2 Product version ES ........................................................................16
3.2 Point detector ................................................................................................17
3.2.1 Multi-sensor smoke detector..........................................................17
3.2.2 Smoke detector..............................................................................18
3.2.3 Heat detector .................................................................................19
3.3 Function.........................................................................................................20
3.3.1 Parameter sets...............................................................................20
3.3.2 Danger levels .................................................................................20
3.3.3 Diagnosis levels .............................................................................20
3.3.4 Line separator ................................................................................21
3.3.5 Internal alarm indicator in the case of ES <10...............................21
3.3.6 Extended flashing behavior of alarm indicators in the case of
ES ≥10 ...........................................................................................22
3.3.7 Connection for external alarm indicators .......................................23
3.3.8 Test mode ......................................................................................23
3.3.9 Behavior in degraded mode...........................................................24
3.3.10 Line tester ......................................................................................24
3.4 Mechanical setup ..........................................................................................25
3.5 Accessories ...................................................................................................26
3.5.1 Detector base with loop contact DB721 ........................................26
3.5.2 Detector base DB722 ....................................................................26
3.5.3 Detector base DB720 ....................................................................27
3.5.4 Sounder base DBS720 ..................................................................27
3.5.5 Designation plate FDBZ291...........................................................27
3.5.6 Detector base seal RS720.............................................................27
3.5.7 Base attachment BA720 ................................................................28
3.5.8 Base attachment wet BA721 .........................................................28
3.5.9 Designation plate DBZ1193A ........................................................28
3.5.10 Detector heating unit FDBH291.....................................................28

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3.5.11 Protective cage DBZ1194 ..............................................................29
3.5.12 Detector locking device LP720 ......................................................29
3.5.13 Micro terminal DBZ1190-AA ..........................................................29
3.5.14 Connection terminal DBZ1190-AB.................................................30
4 Planning ....................................................................................................31
4.1 Compatibility ..................................................................................................31
4.2 Multi-sensor smoke detector .........................................................................31
4.2.1 Parameter sets...............................................................................31
4.2.2 Specifications.................................................................................32
4.3 Smoke detector .............................................................................................32
4.3.1 Parameter sets...............................................................................32
4.3.2 Specifications.................................................................................33
4.4 Heat detector.................................................................................................33
4.4.1 Parameter sets...............................................................................33
4.4.2 Specifications.................................................................................34
5 Mounting / Installation................................................................................35
5.1 Required space .............................................................................................35
5.2 Detector base DB72x ....................................................................................36
5.3 Sounder base DBS720..................................................................................38
5.4 Detector base seal RS720 ............................................................................39
5.5 Base attachment BA720................................................................................40
5.6 Base attachment wet BA721.........................................................................41
5.7 Detector locking device LP720......................................................................44
5.8 Designation plate FDBZ291 ..........................................................................45
5.9 Cable entry ....................................................................................................46
5.9.1 Auxiliary terminals DBZ1190-AA/-AB ............................................47
5.10 Detector lines ................................................................................................47
5.10.1 Connection diagram, addressed....................................................47
5.11 Detector dust cap ..........................................................................................49
5.12 Detector heating unit FDBH291 ....................................................................50
5.12.1 Installation of the detector heating unit ..........................................50
5.12.2 Connection of the detector heating unit .........................................51
6 Commissioning..........................................................................................52
6.1 Commissioning on the C-NET.......................................................................52
7 Maintenance / Repair.................................................................................53
7.1 Performance check .......................................................................................53
7.2 Testing detectors...........................................................................................53
8 Specifications ............................................................................................54
8.1 Multi-sensor smoke detector technical data..................................................54
8.2 Smoke detector technical data ......................................................................56
8.3 Heat detector technical data..........................................................................58
8.4 Dimensions....................................................................................................60
8.5 Environmental compatibility...........................................................................60
Index ..................................................................................................................61

0BAbout this document
8BApplicable documents
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1About this document
Goal and purpose
This document contains information on automatic fire detectors. Following the
instructions consistently will ensure that the product can be used safely and without
any problems.
Scope
The document is valid for the following automatic fire detectors:
●OH720
●OP720
●HI720
●HI722
Target groups
The information in this document is intended for the following target groups:
Target group
Activity
Qualification
Product Manager ●Is responsible for information
passing between the manufacturer
and regional company.
●Coordinates the flow of information
between the individual groups of
people involved in a project.
●Has obtained suitable specialist
training for the function and for the
products.
●Has attended the training courses
for Product Managers.
Project Manager ●Coordinates the deployment of all
persons and resources involved in
the project according to schedule.
●Provides the information required to
run the project.
●Has obtained suitable specialist
training for the function and for the
products.
●Has attended the training courses
for Project Managers.
Project engineer ●Sets parameters for product
depending on specific national
and/or customer requirements.
●Checks operability and approves
the product for commissioning at the
place of installation.
●Is responsible for troubleshooting.
●Has obtained suitable specialist
training for the function and for the
products.
●Has attended the training courses
for Product Engineer.
Installation personnel ●Assembles and installs the product
components at the place of
installation.
●Carries out a performance check
following installation.
●Has received specialist training in
the area of building installation
technology or electrical installations.
Maintenance personnel ●Carries out all maintenance work.
●Checks that the products are in
perfect working order.
●Searches for and corrects
malfunctions.
●Has obtained suitable specialist
training for the function and for the
products.
Source language and reference document
●The source/original language of this document is German (de).
●The reference version of this document is the international version in English.
The international version is not localized.

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Document identification
The document ID is structured as follows:
ID code
Examples
ID_ModificationIndex_Language_COUNTRY
-- = multilingual or international
A6V10215123_a_de_DE
A6V10215123_a_en_--
A6V10315123_a_--_--
Date format
The date format in the document corresponds to the recommendation of
international standard ISO 8601 (format YYYY-MM-DD).
Conventions for text marking
Markups
Special markups are shown in this document as follows:
⊳Requirement for a behavior instruction
1.
2.
Behavior instruction with at least two operation sequences
– Version, option, or detailed information for a behavior instruction
⇨Intermediate result of a behavior instruction
⇨End result of a behavior instruction
●Numbered lists and behavior instructions with an operation
sequence
[➙ X] Reference to a page number
'Text' Quotation, reproduced identically
<Key> Identification of keys
> Relation sign and for identification between steps in a sequence,
e.g., 'Menu bar' > 'Help' > 'Help topics'
↑Text Identification of a glossary entry
Supplementary information and tips
The 'i' symbol identifies supplementary information and tips for an easier way of
working.

0BAbout this document
8BApplicable documents
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1.1 Applicable documents
Document ID
Name
008115 Installation Detector heating FDBH291
008250 Technical Manual Line tester FDUL221
A6V10200373 Installation Detector base with loop contact DB721, DB722, detector
base DB720, sounder base DBS720, detector base seal RS720,
detector locking device LP720, base attachment BA720
A6V10201731 Installation Detector exchanger DX791, adapter for detector
exchanger FDUD491
A6V10202198 Data sheet Automatic fire detectors OH720, OP720, HI720, HI722
A6V10203222 Data Sheet Testequipment and accessories FDUL221, DX791, RE6,
RE7T, RE8ST, RE8STCO, FDUM29x, LE3, StabexHF
A6V10229261 List of compatibility (for 'Cerberus™ PRO' product line)
A6V10254740 Operating instructions Solo461 heat detector tester kit RE7T
A6V10406006 Installation Base attachment wet BA721, Detector designation plate
DBZ1193A, Protective cage DBZ1194, EMC-protective cage
FDBZ294
Please also observe the documentation for your fire detection system.
1.2 Download center
You can download various types of documents, such as data sheets, installation
instructions, and license texts via the following Internet address:
http://siemens.com/bt/download
Enter the document ID in the 'Find by keyword' input box.
You will also find information about search variants and links to mobile
applications (apps) for various systems on the home page.
1.3 Technical terms
Term
Explanation
AI Alarm indicator
C-NET Addressed detector line
EAI External alarm indicator
ES Product version
IAI Internal alarm indicator

0BAbout this document
11BHistory of changes
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1.4 History of changes
The reference document's version applies to all languages into which the reference
document is translated.
The first edition of a language version or a country variant may, for example, be
version 'd' instead of 'a' if the reference document is already this version.
The table below shows this document's revision history:
Modification index
Edition date
Brief description
m 2015-05-04 Information about the extended flashing behavior inserted
l 2014-10-24 Flashing behavior updated
Additions to the 'Internal alarm indicator' chapter
k 2014-09-12 Additions to the 'Technical data' chapters
j 2014-03-04 Change to date format in line with ISO 8601 specifications (yyyy-mm-dd format);
various changes in the 'Specifications' chapter; editorial changes; base attachment
wet BA721, designation plate DBZ1193A, protective cage DBZ1194, EMC-protective
cage FDBZ294, and detector heating unit FDBH291 added, data sheet in 'Applicable
documents' chapter added; 'Download center' chapter added; 'Internal alarm
indicator' chapter revised
i 10.2011 Detector base DB722 and base attachment BA720 added, marine approval added,
max. operating temperature changed to 55 °C, 'Product version' chapter added
h 03.2011 Connection diagram corrected
g 09.2010 FM approvals added
f 04.2010 New external alarm indicators added, minor editorial changes
e 09.2009 LPCB approvals added
d 08.2009 Detector base with loop contact DB721 added
c 04.2009 Cable cross section for detector base specified and minor editorial changes made
VdS approval and CPD no. added
b 10.2008 Protection classes changed
a 09.2008 First edition

0BAbout this document
11BHistory of changes
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The table below shows the published language versions with the corresponding
modification index:
Modification index
en_--
de_--
fr_--
it_--
es_--
m XXXXX
l XXXXX
k – X– – –
j XXXXX
i XXXXX
h XXXXX
g XXXXX
f XXXXX
e XX– – –
d XXXXX
c XXXXX
b XXXXX
a XXXXX
X = published
– = no publication with this modification index

1BSafety
12BSafety instructions
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2Safety
2.1 Safety instructions
The safety notices must be observed in order to protect people and property.
The safety notices in this document contain the following elements:
●Symbol for danger
●Signal word
●Nature and origin of the danger
●Consequences if the danger occurs
●Measures or prohibitions for danger avoidance
Symbol for danger
This is the symbol for danger. It warns of
risks of injury
.
Follow all measures identified by this symbol to avoid injury or death.
Additional danger symbols
These symbols indicate general dangers, the type of danger or possible
consequences, measures and prohibitions, examples of which are shown in the
following table:
General danger Explosive atmosphere
Voltage/electric shock Laser light
Battery Heat
Signal word
The signal word classifies the danger as defined in the following table:
Signal word
Danger level
DANGER
DANGER identifies a dangerous situation, which
will result directly in death or
serious injury
if you do not avoid this situation.
WARNING
WARNING identifies a dangerous situation, which
may result in death or serious
injury
if you do not avoid this situation.
CAUTION
CAUTION identifies a dangerous situation, which could result in
slight to
moderately serious injury
if you do not avoid this situation.
NOTICE NOTICE identifies possible damage to property that may result from non-
observance.

1BSafety
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How risk of injury is presented
Information about the risk of injury is shown as follows:
WARNING
Nature and origin of the danger
Consequences if the danger occurs
●Measures / prohibitions for danger avoidance
How possible damage to property is presented
Information about possible damage to property is shown as follows:
NOTICE
Nature and origin of the danger
Consequences if the danger occurs
●Measures / prohibitions for danger avoidance

1BSafety
13BSafety regulations for the method of operation
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2.2 Safety regulations for the method of operation
National standards, regulations and legislation
Siemens products are developed and produced in compliance with the relevant
European and international safety standards. Should additional national or local
safety standards or legislation concerning the planning, mounting, installation,
operation or disposal of the product apply at the place of operation, then these
must also be taken into account together with the safety regulations in the product
documentation.
Electrical installations
WARNING
Electrical voltage
Electric shock
●Work on electrical installations may only be carried out by qualified
electricians or by instructed persons working under the guidance and
supervision of a qualified electrician, in accordance with the electrotechnical
regulations.
●Wherever possible disconnect products from the power supply when carrying
out commissioning, maintenance or repair work on them.
●Lock volt-free areas to prevent them being switched back on again by mistake.
●Label the connection terminals with external external voltage using a
'DANGER External voltage' sign.
●Route mains connections to products separately and fuse them with their own,
clearly marked fuse.
●Fit an easily accessible disconnecting device in accordance with IEC 60950-1
outside the installation.
●Produce earthing as stated in local safety regulations.
Mounting, installation, commissioning and maintenance
●If you require tools such as a ladder, these must be safe and must be intended
for the work in hand.
●When starting the fire control panel ensure that unstable conditions cannot
arise.
●Ensure that all points listed in the 'Testing the product operability' section below
are observed.
●You may only set controls to normal function when the product operability has
been completely tested and the system has been handed over to the customer.

1BSafety
13BSafety regulations for the method of operation
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Testing the product operability
●Prevent the remote transmission from triggering erroneously.
●If testing building installations or activating devices from third-party companies,
you must collaborate with the people appointed.
●The activation of fire control installations for test purposes must not cause
injury to anyone or damage to the building installations. The following
instructions must be observed:
–Use the correct potential for activation; this is generally the potential of the
building installation.
–Only check controls up to the interface (relay with blocking option).
–Make sure that only the controls to be tested are activated.
●Inform people before testing the alarm devices and allow for possible panic
responses.
●Inform people about any noise or mist which may be produced.
●Before testing the remote transmission, inform the corresponding alarm and
fault signal receiving stations.
Modifications to the system design and the products
Modifications to the system and to individual products may lead to faults,
malfunctioning and safety risks. Written confirmation must be obtained from
Siemens and the corresponding safety bodies for modifications or additions.
Modules and spare parts
●Components and spare parts must comply with the technical specifications
defined by Siemens. Only use products specified or recommended by
Siemens.
●Only use fuses with the specified fuse characteristics.
●Wrong battery types and improper battery changing lead to a risk of explosion.
Only use the same battery type or an equivalent battery type recommended by
Siemens.
●Batteries must be disposed of in an environmentally friendly manner. Observe
national guidelines and regulations.
Disregard of the safety regulations
Before they are delivered, Siemens products are tested to ensure they function
correctly when used properly. Siemens disclaims all liability for damage or injuries
caused by the incorrect application of the instructions or the disregard of danger
warnings contained in the documentation. This applies in particular to the following
damage:
●Personal injuries or damage to property caused by improper use and incorrect
application
●Personal injuries or damage to property caused by disregarding safety
instructions in the documentation or on the product
●Personal injury or damage to property caused by poor maintenance or lack of
maintenance

1BSafety
14BStandards and directives complied with
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2.3 Standards and directives complied with
A list of the standards and directives complied with is available from your Siemens
contact.
2.4 Release Notes
Limitations to the configuration or use of devices in a fire detection installation with
a particular firmware version are possible.
WARNING
Limited or non-existent fire detection
Personal injury and damage to property in the event of a fire.
●Read the 'Release Notes' before you plan and/or configure a fire detection
installation.
●Read the 'Release Notes' before you carry out a firmware update to a fire
detection installation.
NOTICE
Incorrect planning and/or configuration
Important standards and specifications are not satisfied.
Fire detection installation is not accepted for commissioning.
Additional expense resulting from necessary new planning and/or configuration.
●Read the 'Release Notes' before you plan and/or configure a fire detection
installation.
●Read the 'Release Notes' before you carry out a firmware update to a fire
detection installation.

2BStructure and function
16BOverview
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3Structure and function
3.1 Overview
In this document the following point detectors are referred to collectively using the
term 'Automatic fire detectors':
●Multi-sensor smoke detector OH720
●Smoke detector OP720
●Heat detector (static and differential) HI720
●Heat detector (static only) HI722
Multi-sensor smoke detector
OH720
Smoke detector
OP720
Heat detector (static and
differential)
HI720
Heat detector (static only)
HI722
Can be used addressed on the
C-NET
Can be used addressed on the
C-NET
Can be used addressed on the C-
NET
Can be used addressed on the
C-NET
2 parameter sets 2 parameter sets 1 parameter set
Detection behavior can be selected Detection behavior cannot be
selected
3.1.1 Details for ordering
Type
Order no.
Designation
OH720 S54310-F2-A1 Multi-sensor smoke detector
OP720 S54310-F1-A1 Smoke detector
HI720 S54310-F4-A1 Heat detector (static and differential)
HI722 S54310-F3-A1 Heat detector (static only)

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3.1.2 Product version ES
The product version ES provides the technical status of a device in terms of
software and hardware. The product version is provided as a two-digit number.
You will find the details of your device's product version:
●On the packaging label
●On the product label or the type plate
Product version on the packaging label
Details of the product version can be found directly on the packaging label in the
barcode:
Figure 1: Example of a packaging label with details of the product version
Product version on the product label and the type plate
Details of the product version can be found after the device order number:
Figure 2: Example of a product label with details of the product version
Depending on the product and various approvals, the product labels may differ in
terms of the information type and layout.
Look for your device's order number on the product label.
You will find the product version after the order number.
ES
ES
04

2BStructure and function
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3.2 Point detector
3.2.1 Multi-sensor smoke detector
The multi-sensor smoke detector OH720 is a multiple criteria fire detector with one
optical and one thermal sensor.
Structure and function
1 Labyrinth 3 Optical receiver
2 Optical transmitter 4 Heat sensor
The detector has a high-quality opto-electronic measuring chamber. The
measuring chamber contains:
●One optical transmitter
●One optical receiver
●One thermal sensor
The transmitter lights up the smoke particles. The scattered light then hits the
receiver (photodiode) and generates a measurable electric signal.
In addition, the heat sensor makes it possible to detect fires in cases where no
smoke has been generated.
The combination of optical and thermal sensor signals optimizes detection
reliability with the following benefits.
●Early detection of all types of fire, whether they generate light or dark smoke, or
no smoke at all.
●The fire detector can be operated at a lower sensitivity level, thus achieving
improved immunity against false alarms which may be caused by cold
aerosols. In the event of an open fire, the smoke sensitivity level is raised by an
increase in temperature which makes rapidly burning fires easier to detect.
The multi-sensor smoke detector OH720 has two parameter sets: 'Robust' and
'Sensitive'.
The multi-sensor smoke detector is addressed by the control panel when first
switched on.
If a short-circuit occurs, the defective part on the detector line is located by the
control panel and isolated between two detectors. In addition, a loop line
installation ensures an optimum level of safety.
See also
Multi-sensor smoke detector [➙ 31]
1
2
3
4

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3.2.2 Smoke detector
The wide-spectrum smoke detector OP720 is an optical smoke detector with an
optical sensor.
Structure and function
1 Labyrinth 3 Optical receiver
2 Optical transmitter
The wide-spectrum smoke detector has the same measuring chamber as the multi-
sensor smoke detector.
The smoke detector OP720 addresses itself automatically when the control panel
is first switched on, thus enabling individual identification in the event of an alarm.
If a short-circuit occurs, the defective part on the detector line is located by the
control panel and isolated between two detectors. In addition, a loop line
installation ensures an optimum level of safety.
The smoke detector OP720 has two parameter sets: 'Standard' and 'Sensitive'.
See also
Smoke detector [➙ 32]
1
2
3

2BStructure and function
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3.2.3 Heat detector
The heat detectors HI720 and HI722 have a straightforward design featuring a
thermal sensor.
The following table indicates the most important differences between the two heat
detectors.
HI720
HI722
Alarm activation by: ●Temperature increase
●Reaching the maximum
temperature
●Reaching the maximum
temperature
Number of parameter sets 2 1
Structure and function
1 Heat sensor
The heat detector HI720 has two parameter sets: 'A2S' (static) and 'A2R'
(differential).
The heat detector HI722 has one parameter set: 'A2S' (static).
The heat detectors HI720 and HI722 address themselves automatically when the
control panel is first switched on, thus enabling individual identification in the event
of an alarm.
If a short-circuit occurs, the defective part on the detector line is located by the
control panel and isolated between two detectors. In addition, a loop line
installation ensures an optimum level of safety.
See also
Heat detector [➙ 33]
1

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18BFunction
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3.3 Function
3.3.1 Parameter sets
The detection behavior of the detectors is influenced by the parameter sets, so that
it can be specifically adjusted to the fire phenomena and environmental conditions
to be expected in the environment to be monitored.
All parameter sets are programmed in the detectors. During commissioning, the
optimum parameter set must be selected for the conditions at the place of
installation. On a C-NET detector line, this is carried out at the control panel.
3.3.2 Danger levels
Measured values above a "response threshold" are not the only basis for reaching
a danger level. The smoke density progression is also observed over a longer
period of time and evaluated using algorithms.
Fire detectors can transmit the following danger levels to the control panel:
Danger level
Meaning
Comment
0 No danger Normal condition
1 Check situation A different parameter set should potentially be
selected (inappropriate application)
2 Warning Possible danger
3 Alarm Fire
Each fire detector has danger levels 0…3.
The evaluation of the danger level and the decisions to be taken (e.g. activation of
remote transmission) are configured in the relevant control panel.
3.3.3 Diagnosis levels
The point detector monitors most of its functions itself. In particular it monitors the
correct functioning of the microcontroller, temperature sensors, light emitter and
light receiver.
The following diagnosis levels are derived from the different control measurements:
●Normal
●Observe information
●Replacement recommended
●Replacement necessary
●Fault
When a fatal error occurs, which prevents the proper function of the detector, a
fault message is signaled.