Endress+Hauser SOP300 User manual

Products Solutions Services
Operating Instructions
Overfill Prevention System
SOP300
For reliable and secure tank overfill prevention
BA01787S/04/EN/02.18
71401701

Change history Overfill Prevention System SOP300
2 Endress+Hauser
Change history
Product version Operating Instructions Changes Comments
1.00.XX BA01787S/04/EN/01.17 Initial version –
As of 1.00.01 BA01787S/04/EN/02.18 Message numbers 301 and 311 added. –

Overfill Prevention System SOP300 Table of contents
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Table of contents
1 About this document ................ 8
1.1 Document function ..................... 8
1.2 Symbols used .......................... 8
1.2.1 Safety symbols .................. 8
1.2.2 Symbols for certain types of
information .................... 8
1.2.3 Electrical symbols ................ 9
1.3 Text emphasis ......................... 9
1.4 Acronyms used ........................ 9
1.5 Valid versions ........................ 10
1.6 Documentation ....................... 10
1.7 Registered trademarks .................. 10
2 Basic safety instructions ........... 11
2.1 Requirements for personnel .............. 11
2.2 Designated use ....................... 11
2.3 Occupational safety .................... 11
2.4 Operational safety ..................... 12
2.4.1 Modifications to the system ........ 12
2.4.2 Repairs ....................... 12
2.5 Product safety ........................ 12
2.6 IT security ........................... 12
3 Product description ................ 13
3.1 Product design ........................ 13
3.1.1 System overview ................ 14
3.1.2 Power supply .................. 16
3.1.3 Input signals ................... 18
3.1.4 Output signals .................. 19
3.1.5 Temperature monitoring .......... 21
3.1.6 Interfaces (optional) ............. 22
3.1.7 Remote maintenance modem /
gateway ...................... 22
3.2 Key system features .................... 22
3.3 Scaling ............................. 22
3.4 Customer benefits ..................... 23
4 Incoming acceptance and product
identification ..................... 24
4.1 Incoming acceptance ................... 24
4.2 Product identification ................... 24
4.2.1 Endress+Hauser products ......... 24
4.3 Storage and transport .................. 24
5 Installation ....................... 25
5.1 Installation conditions .................. 25
5.1.1 Control cabinet ................. 25
5.1.2 Field signalization (cables and
components) ................... 25
5.1.3 Sensors ....................... 25
5.2 Mounting the control cabinet ............. 25
5.2.1 Control cabinet for wall mounting ... 26
5.2.2 Cabinet for free-standing
installation .................... 26
5.3 Mounting the field signalization system ..... 27
5.4 Post-installation check .................. 28
6 Electrical connection .............. 29
6.1 Connection conditions .................. 29
6.2 Connecting the system .................. 29
6.2.1 Supply voltage electrical connection .. 29
6.2.2 Electrical connection of the input
signals ....................... 30
6.2.3 Electrical connection of the output
signals ....................... 32
6.3 Ensuring the degree of protection .......... 33
6.4 Post-connection check .................. 34
7 Operation options ................. 35
8 Commissioning .................... 36
8.1 Function check ....................... 36
8.2 Switching on the Overfill Prevention System .. 36
8.2.1 Switching on the Overfill Prevention
System with an optional UPS ....... 36
8.2.2 Switching on the Overfill Prevention
System without an optional UPS .... 36
8.3 Configuring the Overfill Prevention System ... 37
8.4 Configuring sensors .................... 37
8.5 Performing the functional test ............ 37
9 Operation ......................... 38
9.1 Built-in door elements .................. 38
9.1.1 "Acknowledge" push button ........ 38
9.1.2 "Reset" illuminated push button ..... 38
9.1.3 "System ok" signal lamp ........... 38
9.1.4 "Warning" signal lamp ............ 38
9.1.5 "Alarm" signal lamp .............. 38
9.1.6 "Alarm/Warning" buzzer .......... 39
9.2 Visualization (HMI) .................... 39
9.2.1 Touch display .................. 39
9.2.2 HMI navigation ................. 39
9.2.3 User administration .............. 40
9.2.4 General information ............. 41
9.2.5 "Home" screen .................. 44
9.2.6 "Tank Area Overview" screen ....... 45
9.2.7 "Guidance" screen ............... 47
9.2.8 "Diagnostics" screen .............. 55
9.2.9 "System" screen ................. 63
10 Diagnostics and troubleshooting ... 83
10.1 General troubleshooting ................. 83
10.2 Overview of diagnostic information ........ 83
10.3 Firmware ........................... 88

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11 Maintenance ...................... 89
11.1 Endress+Hauser services ................ 89
12 Repairs ........................... 90
12.1 General notes ........................ 90
12.2 Spare parts .......................... 90
12.3 Endress+Hauser services ................ 91
12.4 Disposal ............................ 91
13 Technical data .................... 92

Overfill Prevention System SOP300 List of figures
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List of figures
 1 Overview of Manual Overfill Prevention System (MOPS), example ................................ 13
 2 Overview of Automatic Overfill Prevention System (AOPS), example .............................. 14
 3 System overview with integrated operating elements (standard) ................................. 14
 4 Example of control cabinet, exterior view (wall cabinet 1000 mm x 1200 mm x 300 mm) .............. 15
 5 Example of control cabinet, interior view (wall cabinet 1000 mm x 1200 mm x 300 mm) .............. 16
 6 Power supply ....................................................................... 17
 7 Battery for the UPS .................................................................. 18
 8 Nivotester FTL325P .................................................................. 19
 9 Safety relay ........................................................................ 20
 10 Alarm siren ........................................................................ 20
 11 Alarm strobe ....................................................................... 21
 12 Pt1000 temperature sensor ............................................................ 21
 13 Thermostat for the cabinet fan .......................................................... 21
 14 Remote maintenance modem / gateway ................................................... 22
 15 Example: control cabinet for wall mounting ................................................. 26
 16 Example: free-standing cabinet .......................................................... 27
 17 Supply voltage connection without a redundant power supply in the control cabinet SOP300 ............ 30
 18 Supply voltage connection with a redundant power supply in the control cabinet SOP300 – with a
redundant supply voltage .............................................................. 30
 19 Supply voltage connection with a redundant power supply in the control cabinet SOP300 – without a
redundant supply voltage .............................................................. 30
 20 Connection example Liquiphant FTL5x / FTL7x with FEL57 electronic insert ........................ 31
 21 Connection example for point level switches ................................................ 31
 22 Connection example of point level switch with device error ..................................... 31
 23 Left: connection example for 2-wire sensor with 4 to 20 mA signal, right: connection example for 4-wire
sensor with 4 to 20 mA signal .......................................................... 32
 24 Connection example for valve control, valve closed without current; alarm relay activated in the "Good" state,
change-over contact (1) and NO contact (2) closed ........................................... 32
 25 Connection example for signalization of the system status; system alarm relay activated in the "Good" state,
change-over contact (1) and NO contact (2) closed ........................................... 33
 26 Built-in door elements ................................................................ 38
 27 HMI home screen, first and second level ................................................... 39
 28 Status bar ......................................................................... 41
 29 Navigation bar ...................................................................... 42
 30 Header in wizards .................................................................... 42
 31 Integrated navigation bar .............................................................. 42
 32 Numeric keypad .................................................................... 43
 33 Alphanumeric keypad with lower case letters ............................................... 43
 34 Alphanumeric keypad with upper case letters ............................................... 44
 35 Home screen ....................................................................... 44
 36 "Tank Area Overview" screen ........................................................... 45

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 37 Tank Overview screen ................................................................. 46
 38 "Tank Details" screen ................................................................. 46
 39 "Guidance" screen .................................................................... 47
 40 Automated Proof-Test, step 1 ........................................................... 48
 41 Automated Proof-Test, step 2 ........................................................... 49
 42 Automated Proof-Test, step 3 ........................................................... 50
 43 Automated Proof-Test, step 4 ........................................................... 51
 44 Automated Proof-Test, step 5 ........................................................... 52
 45 Automated Proof-Test, step 6 ........................................................... 53
 46 Signaling Proof-Test, step 1 ............................................................ 54
 47 Signaling Proof-Test, step 2 ............................................................ 54
 48 Signaling Proof-Test, step 3 ............................................................ 55
 49 "Diagnostics" screen ................................................................... 56
 50 "Messages" screen ................................................................... 56
 51 Possible alarm states ................................................................. 57
 52 Possible warning states ............................................................... 57
 53 Messages History screen ............................................................... 57
 54 Possible historical information on the alarm states ........................................... 58
 55 Possible historical information on the warning states ......................................... 58
 56 "System Diagnostics" screen ............................................................. 58
 57 "Proof-Test Overview" screen ............................................................ 59
 58 "Select a Proof-Test Log File" dialog box .................................................... 59
 59 "Proof-Test Log" screen ................................................................ 60
 60 "Upcoming Proof-Test" screen ........................................................... 61
 61 "Export System Dump" dialog box ........................................................ 62
 62 "System" screen ...................................................................... 63
 63 "System Settings" screen ............................................................... 64
 64 "Date/Time" dialog box ................................................................ 64
 65 "Select Time Zone" dialog box ............................................................ 65
 66 "IP Configuration" dialog box ............................................................ 66
 67 "Display" dialog box .................................................................. 66
 68 "Reboot" dialog box ................................................................... 67
 69 "General Settings" dialog box ............................................................ 68
 70 "Electronic Nameplate" dialog box ........................................................ 68
 71 "Application Settings" screen ............................................................ 69
 72 "Basic Application Settings" dialog box ..................................................... 70
 73 "Basic Area Settings" dialog box ......................................................... 71
 74 "Basic Tank Settings" dialog box ......................................................... 72
 75 "Load Application Configuration" dialog box ................................................ 74
 76 "Advanced Tank Settings" dialog box ...................................................... 75
 77 "System Information" pop-up window ..................................................... 75
 78 "Language" dialog box ................................................................. 76

Overfill Prevention System SOP300 List of figures
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 79 "User Management" screen ............................................................. 77
 80 "Login / Logout" dialog box ............................................................. 77
 81 "Change Password" dialog box ........................................................... 78
 82 "Auto Logout Time" dialog box ........................................................... 79
 83 "License Management" screen ........................................................... 79
 84 "Remote Maintenance" screen ........................................................... 81

About this document Overfill Prevention System SOP300
8 Endress+Hauser
1 About this document
1.1 Document function
These Operating Instructions contain all the information that is required in various phases
of the life cycle of the device: from product identification, incoming acceptance and
storage, to mounting, connection, operation and commissioning through to
troubleshooting, maintenance and disposal.
1.2 Symbols used
1.2.1 Safety symbols
Symbol Meaning
DANGER
DANGER!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will result in
serious or fatal injury.
WARNING
WARNING!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
serious or fatal injury.
CAUTION
CAUTION!
This symbol alerts you to a dangerous situation. Failure to avoid this situation can result in
minor or medium injury.
NOTICE
NOTE!
This symbol contains information on procedures and other facts which do not result in
personal injury.
1.2.2 Symbols for certain types of information
Symbol Meaning
Permitted
Procedures, processes or actions that are permitted.
Preferred
Procedures, processes or actions that are preferred.
Forbidden
Procedures, processes or actions that are forbidden.
Tip
Indicates additional information.
Reference to documentation
A
Reference to page
Reference to graphic
Notice or individual step to be observed
1.
,
2.
,
3.
… Series of steps
Result of a step
Help in the event of a problem
Visual inspection

Overfill Prevention System SOP300 About this document
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1.2.3 Electrical symbols
Symbol Meaning Symbol Meaning
Direct current Alternating current
Direct current and alternating current Ground connection
A grounded terminal which, as far as
the operator is concerned, is
grounded via a grounding system.
Protective ground connection
A terminal which must be connected
to ground prior to establishing any
other connections.
Equipotential connection
A connection that has to be connected
to the plant grounding system: This
may be a potential equalization line
or a star grounding system depending
on national or company codes of
practice.
1.3 Text emphasis
Emphasis Meaning Example
Bold Keys, buttons, program icons, tabs, menus,
commands
Start → Programs → Endress+Hauser
In the File menu, select the Print option.
Angle brackets Variables <DVD drive>
1.4 Acronyms used
Acronyms Meaning
AC Alternating Current
AOPS Automated Overfill Prevention System
CPU Central Processing Unit
DC Direct Current
DHCP Dynamic Host Configuration Protocol
H High-Limit (upper warning limit)
HH HighHigh-Limit (upper alarm limit)
HMI Human Machine Interface (e.g. operating panel)
L Low-Limit (lower warning limit)
LL LowLow-Limit (lower alarm limit)
NC Normally Closed
NO Normally Open
OPS Overfill Prevention System
MOPS Manual Overfill Prevention System
PLC Programmable Logic Controller
UPS Uninterruptible Power Supply
VNC Virtual Network Computing (software for the transmission of the screen content)
WAN Wide Area Network (possible communication channel for remote maintenance modem)
3G Wireless data transmission standard (possible communication channel for remote maintenance
modem)
I/O Inputs/Outputs

About this document Overfill Prevention System SOP300
10 Endress+Hauser
1.5 Valid versions
Component Version
Software V1.00.xx
Hardware platform V1.00.xx
1.6 Documentation
Overfill Prevention System SOP300
• Brief Operating Instructions KA01345S/04/EN
• Electrical wiring diagram
• On DVD:
– Technical Information TI01358S/04/EN
– Documentation for internal components
1.7 Registered trademarks
All brand and product names are trademarks or registered trademarks of the respective
companies and organizations.

Overfill Prevention System SOP300 Basic safety instructions
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2 Basic safety instructions
2.1 Requirements for personnel
The personnel for installation, commissioning, diagnostics and maintenance must meet
the following requirements:
‣Trained, qualified specialists: must have a relevant qualification for this specific role
and task and have been trained by Endress+Hauser. Experts at the Endress+Hauser
service organization.
‣Personnel must be authorized by the plant owner/operator.
‣Personnel must be familiar with regional and national regulations.
‣Before starting work: personnel must read and understand the instructions in the
manual and supplementary documentation as well as the certificates (depending on
the application).
‣Personnel must follow instructions and comply with general policies.
Operating personnel must meet the following requirements:
‣Personnel are instructed and authorized according to the requirements of the task by
the facility's owner-operator.
‣Personnel follow the instructions in this manual.
2.2 Designated use
The Overfill Prevention System has been designed as a safety function for the monitoring
of critical levels (HH, H, L, LL) in tanks. It is also possible to monitor leaks in tanks and
tank pipes in the tank basin. Appropriate sensors must be used for monitoring.
For more information on "sensors", see the Technical Information →  10
Any other use is considered to be non-designated use. Designated use entails compliance
with the operating and maintenance requirements specified by the manufacturer. The
Overfill Prevention System must be installed in a safe environment (not in hazardous areas
or Ex zones). We recommend that you install the Overfill Prevention System in a dry, air-
conditioned room.
Dangers
It is the responsibility of the owner/operator to assess any dangers for the systems.
These dangers must be assessed by the owner/operator and the measures resulting
from the assessment must be implemented. While the Overfill Prevention System can
form part of such a measure, responsibility for the entire safety function always rests
with the owner/operator, particularly the taking of suitable measures if the Overfill
Prevention System signals an alarm. We also specifically state that relevant measures
must also be assessed from a process engineering perspective.
Incorrect use
Non-designated use can compromise safety. The manufacturer is not liable for
damage caused by improper or non-designated use.
2.3 Occupational safety
Personnel must meet the following conditions when working on and with the system:
‣Wear the required personal protective equipment according to regional/national
regulations.
‣When welding, do not ground the welding unit via the system.
‣If hands are wet, wear gloves on account of the higher risk of electric shock.

Basic safety instructions Overfill Prevention System SOP300
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2.4 Operational safety
Operate the system only if it is in proper technical condition, free from errors and faults.
The operator is responsible for the interference-free operation of the system.
2.4.1 Modifications to the system
Unauthorized modifications to the system are not permitted and can lead to unforeseeable
dangers:
‣If, despite this, modifications are required, consult with Endress+Hauser.
2.4.2 Repairs
To ensure continued operational safety and reliability:
‣Only carry out repairs that are specifically approved by the manufacturer.
‣Repairs must only be performed by certified Endress+Hauser specialists.
‣Observe federal/national regulations pertaining to the repair of an electrical device.
‣Use original spare parts and accessories from Endress+Hauser only.
2.5 Product safety
This device is designed in accordance with industry practice to meet state-of-the-art safety
requirements, has been tested, and left the factory in a condition in which it is safe to
operate. It meets general safety standards and legal requirements. It also complies with
the EC directives listed in the product-specific EC Declaration of Conformity.
Endress+Hauser confirms this by affixing the CE mark to the device.
2.6 IT security
We only provide a warranty if the system is installed and used as described in the
Operating Instructions. The system is equipped with security mechanisms to protect it
against any inadvertent changes to the device settings.
IT security measures in line with operators' security standards and designed to provide
additional protection for the system and system data transfer must be implemented by the
operators themselves.
The operator is responsible for data backup.

Overfill Prevention System SOP300 Product description
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3 Product description
3.1 Product design
This solution package offers a reliable solution to monitor the level of fluids in tanks (H
and HH as overfill prevention, L and LL to prevent the system from running dry), and to
detect leaks in the tank basin. This product is primarily designed for the oil & gas,
chemical, primaries and metal industries but can also be used in other industries. The
system measures the level using sensors and transmitters and, in the event of an alarm,
switches safety relays or activates alarm signalization devices in the field. Thanks to the
flexible system configuration, a wide range of tank configurations can be monitored in a
single system. A maximum of five different states can be detected per tank (HH, H, L, LL
and leaks). A safety relay can be assigned to each of these alarm and warning states and
responses that correspond to these states can be initiated automatically. Similarly, in the
event of an alarm condition in the system overall, a collective relay can be switched or
corresponding field signalization can be enabled. Depending on the configuration, the
system can be used as either an automatic tank monitoring system (a floating changeover
switch switches in the event of an alarm/warning) or as a manual tank monitoring system
(strobe and/or siren is activated in the event of an alarm).
The actuator connected to the floating contacts is not part of this product. Such
actuators are plant-specific and are therefore the responsibility of the plant owner/
operator.
1
3
5
6
7
2
4
 1 Overview of Manual Overfill Prevention System (MOPS), example
1 Control cabinet of Overfill Prevention System
2 Safety relay output
3 Field signalization siren
4 Field signalization strobe
5 Sensor for High-High alarm
6 Sensor for High warning
7 Actuator to be disabled manually

Product description Overfill Prevention System SOP300
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1
3
4
5
2
 2 Overview of Automatic Overfill Prevention System (AOPS), example
1 Control cabinet of Overfill Prevention System
2 Safety relay output
3 Sensor for High-High alarm
4 Sensor for High warning
5 Automatically disabled actuator
3.1.1 System overview
 3 System overview with integrated operating elements (standard)

Overfill Prevention System SOP300 Product description
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You can also optionally order the operating panel as a remote housing (380 mm x 380 mm
x 210 mm). A maximum distance of 100 m is possible between the control cabinet and
operating panel.
The following elements are integrated into the remote housing:
• 7" touch display as the HMI (optional)
• Built-in door elements →  38
1
3
2
4
 4 Example of control cabinet, exterior view (wall cabinet 1000 mm x 1200 mm x 300 mm)
1 Filter fan
2 Built-in door elements →  38
3 7" touch display (optional)
4 Air filter

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13 4 5 6
7
8
9
11
12
13
14
10
2
 5 Example of control cabinet, interior view (wall cabinet 1000 mm x 1200 mm x 300 mm)
1 Power supply
2 Redundant power supply including redundant module (optional)
3 Optional UPS including button to deactivate the battery if no supply voltage is applied
4 Electronic fuse
5 Controller
6 Network switch
7 Remote modem / gateway (SiteManager)
8 Battery for optional UPS
9 Nivotester
10 Power terminals for mains connection
11 Safety relay
12 Fuse terminals
13 Remote I/Os
14 Power supply circuit breakers
The arrangement varies depending on the configuration.
3.1.2 Power supply
The electricity supply consists of at least one power supply system that converts the supply
voltage from 100 to 240 VAC, 45 to 65 Hz to 24 VDC. As an option, a second (redundant)
power supply system can be used to increase plant availability. To ensure that power is
supplied to the system for a certain amount of time in the event of a power failure, the use
of an uninterruptible power supply (UPS) is also an option. The use of a UPS is urgently
recommended in applications where an alarm is signaled via an alarm siren and/or strobe
as these components need a supply of power for fault signalization. Otherwise, there is no
fault signalization if the power fails. The length of time power is supplied via the UPS
depends on the power requirements of the system and on the capacity of the battery.

Overfill Prevention System SOP300 Product description
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100 to 240 V AC
24 V DC
Power
supply 1
Power
supply 2
Redundanz-
modul
Battery
DC UPS
2 31
100 to 240 V AC
 6 Power supply
1 Bridge provided by the customer onsite if two separate mains connections are not available in a redundant
power supply system
2 Option – redundant power supply, order code "040", version "2" or "4"
3 Option – uninterruptible power supply (UPS), order code "630"
Mains connection
System connection to the electricity mains: 100 to 240 VAC / 45 to 65 Hz
If you have a redundant power supply system but do not have two separate electricity
mains connections, you can bridge the mains connection available in the control cabinet.
Power monitoring
The system provides a DC power supply which powers all the system components,
including the field devices.
The system monitors the power supply and issues a corresponding warning if the mains
voltage fails.
Uninterruptible power supply (optional)
The system provides an uninterruptible DC power supply (UPS) which powers the device
for a certain length of time if the AC mains voltage fails. A UPS should always be used in
manual monitoring systems as a supply of power is needed to signal an alarm (activation
of field signalization).

Product description Overfill Prevention System SOP300
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 7 Battery for the UPS
You must insert the battery fuse during commissioning. Once the battery is fully
charged the "Uninterruptible power supply: Battery charging" warning message
disappears.
If the mains power to the UPS system is interrupted for an extended period, we
recommend that you disconnect the power supply from the UPS (from the battery) by
pressing the red "UPS off" button in the control cabinet. This prevents the battery from
discharging.
3.1.3 Input signals
The input signals depend on the configuration.
A wide variety of sensors can be used as input signals in the Overfill Prevention System to
detect a limit violation. These sensors can also be combined as required, depending on the
conditions in the tanks. Only one signal can be used per limit violation (HH, H, L, LL or
Leak).
Input signal: FTL325P-#1E1 point level switch
A Liquiphant FTL5x/FTL7x (with FEL57 electronic insert) is used for this input signal to
detect a limit value. The limit violation is evaluated by a Nivotester (FTL325P-#1E1)
incorporated in the control cabinet
The Nivotester FTL325P-#1E1 is included in the delivery of the Overfill Prevention
System.

Overfill Prevention System SOP300 Product description
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 8 Nivotester FTL325P
If this type of input is used, you can perform an automated proof test on the system
periodically. Here, the function of the limit detection system is checked intermittently.
In the case of tanks located in hazardous areas, the signals sent by the Liquiphant
devices to the Nivotester are considered Ex-i signals (intrinsically safe signals). This
depends on the Liquiphant devices used.
Input signal: point level switch 1x floating contact (NEx/Ex(d))
Any sensor that provides a floating contact in the event of a limit violation (HH, H, L, LL or
Leak) can be used for this input signal. The contact can either open or close when a limit is
breached. This is specified during system configuration.
We recommend the use of a sensor with a floating contact that is open in the event of
an error (limit violation and power failure). This ensures the correct signal response in
the event of a wire breakage.
Input signal: point level switch 2x floating contact (NEx/Ex(d))
Any sensor that provides a floating contact in the event of a limit violation (HH, H, L, LL or
Leak) can be used for this input signal. In addition, this sensor also makes a second
floating contact available that signals a sensor error. The contact can either open or close
in the event of an error. This is specified during system configuration.
We recommend the use of a sensor with a floating contact that is open in the event of
an error (limit violation and power failure). This ensures the correct signal response in
the event of a wire breakage.
Input signal: continuous level: (4-20mA HART; NEx/Ex(d))
A sensor that provides a continuous 4 to 20 mA signal depending on the level can be used
with this input signal. Sensors with HART-compatible signals can also be used here. It is
possible to access these devices via the Overfill Prevention System with HART signals. In
addition, both two-wire and four-wire sensors can be connected to this signal.
It is possible to detect and signal all four limit violations (HH, H, L, LL) with the
4 to 20 mA input signal. An arrangement that combines the "digital" input signals
mentioned above is also possible (e.g. 4 to 20 mA signal for H and L and one
FTL325P for HH and one FTL325P for LL).
3.1.4 Output signals
The output signals depend on the configuration.
A wide variety of output signals can be used as a response to limit violation or system
alarms in the Overfill Prevention System.

Product description Overfill Prevention System SOP300
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Output signal: alarm relay (changeover contact)
An alarm relay that switches in the event of a limit violation can be used for each function
(HH, H, L, LL and Leak). For safety reasons, the relay is activated during normal operation
so that it is deactivated and therefore assumes the safe state in the event of an alarm, a
power failure or a wire breakage. It is also possible to use such a relay as a collective relay
alarm. This relay is deactivated as soon as the system status changes to ERROR and is
reactivated if the status of the system is OK or WARNING. The relays are used to respond
automatically to an event and therefore a valve or a pump connected to the relay can be
switched off automatically for safety reasons. The system checks whether the relays are
working correctly each time a relay is activated or deactivated, and a message is generated
in the event of an error.
A changeover contact is provided by the safety relay. If a valve or pump is to be
closed/switched off automatically, the normally open (NO) must always be used,
however. This ensures that the relay adopts the safe state in the event of a power
failure or wire breakage and that the connected valve is closed or the connected pump
is switched off.
 9 Safety relay
Output signal: alarm siren with activation feedback
An alarm siren, which is activated when the system status is ERROR, is used for alarm
signalization in the field. Acknowledging the alarm by pressing the door button
(acknowledge alarm with user logged into the system (at least Operator Level access))
switches off the alarm siren. The alarm siren is activated again as soon as a new alarm
occurs. Each time the alarm siren is activated, an acoustic sensor inside the alarm siren
checks that the siren is functioning correctly.
 10 Alarm siren
Output signal: alarm strobe with activation feedback
An alarm strobe, which is activated when the system status is ERROR, is used for alarm
signalization on the field. Acknowledging the alarm by pressing the door button
(acknowledge alarm with user logged into the system (at least Operator Level access))