aquasant AS 2.0 D24 User manual

Operating manual
Safety Liquid Switch
AS 2.0 (2.1) D24 Control Device, 1-channel, SIL2
for connecting electro-optic overfill protection systems,
conductivity detectors and Namur sensors
in 2- and 3-wire configurations

AS 2.0 D24
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Change index
Version
Date
Description
1.00
04/2021
First version for firmware 1.00

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Document information
Distribution: Aquasant Messtechnik AG
Hauptstrasse 22
CH - 4416 Bubendorf
T [phone]
[e-mail]
www.aquasant.com
Production: Aquasant Messtechnik AG
CH-4416 Bubendorf
Manual No.: VEB-Device_AS20D24G [Manual].docx
Version: 210422/1
Firmware: AS 2.0 D24: V1.00
Pages: 40
Changes: Subject to change without notice
© 2021 Aquasant Messtechnik AG claims copyright protection for this document. The
document may not be modified, supplemented or reproduced without prior written
consent.
We reserve the right to make changes to technical details with regard to the description, information
and illustrations in these operating instructions.

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Table of contents
1Information about this document 6
1.1 Target group 6
1.2 Symbols 6
1.3 Supplementary documentation 7
2Safety instructions 8
2.1 General safety instructions 8
2.2Authorised personnel 8
2.3 Intended use 8
2.4 Product safety 8
2.5 Functional approvals 9
3Product information 10
3.1 Basic functions 10
3.2 Special functions 11
3.3 Applications 11
4Installation 14
4.1 Conditions for assembly 14
4.2 Control device assembly on DIN rail 14
4.3 Electrical connections 16
5Operation and parametrisation 19
5.1 Description of the device 19
5.2 Operation 23
5.3 Display and operating module 24
6Initial commissioning 29
6.1 Checking installation 29
6.2 Servicing and troubleshooting 30
6.3 Procedure for repair 30
6.4 Device malfunction 31
6.5 Removal 33
7Appendix 34
7.1 Technical data 34
7.2 Commissioning test report 38
7.3 Declaration of conformity 39

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List of figures and tables
Figure 1 Row of control devices with TBUS connector............................................................10
Figure 2 Using special overspill protection with AS2.0 and AS2.2 - schematic.......................12
Figure 3 Using special overspill protection with two AS2.0 devices - schematic ....................12
Figure 4 Using leakage monitoring - schematic .....................................................................13
Figure 5 Using oil detection with LS - schematic.....................................................................13
Figure 6 Arrangement for installing the AS2.* .......................................................................14
Figure 7 Installing on DIN rail according to NS35 DIN EN 60715............................................15
Figure 8 Device dimensions; top view, side view ....................................................................15
Figure 9 Connection diagram for the AS2.0 D24 G.................................................................18
Figure 10 Nameplate for the AS 2.0 D24 ................................................................................20
Figure 11 DIN rail disassembly................................................................................................33
Table 1 Sensor selector switch ................................................................................................21
Table 2 6-way DIL switch (address) – Device 1 .......................................................................22
Table 3 6-way DIL switch (address) – Device 2 .......................................................................22
Table 4 6-way DIL switch (address) – Device 3 .......................................................................22
Table 5 Description of button functions..................................................................................23
Table 6 Button combinations..................................................................................................23
Table 7 Order of parameters - Description of functions .........................................................25
Table 8 Selector switch parameters (settings)........................................................................28
Table 9 Selector switch parameters – Description of functions..............................................28
Table 10 Menu parameters - Description of functions ...........................................................28
Table 11 Status error messages..............................................................................................31
Table 12 Error messages - Troubleshooting ...........................................................................32

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1Information about this document
This manual provides the information you need to install, connect and commission the
device, as well as important instructions for maintenance, troubleshooting, replacing parts
and user safety. You must therefore read the manual before commissioning and keep it
accessible at all times as part of the product in the immediate vicinity of the device.
1.1 Target group
This operating manual is intended for trained specialists. The contents of this manual must
be made accessible to each specialist and must be applied.
1.2 Symbols
A yellow triangle indicates a warning. Each warning sign is provided.
1.2.1 Warnings
Explosion protection symbol
Observe the warnings to ensure explosion protection.
Electrical symbol
Observe the warnings for hazards with electrical voltage.
Attention symbol
Pay special attention to the instructions.
Operating symbol
Follow the instructions for operating the control device
Maintenance symbol
Information regarding maintenance
Manual symbol
Follow the instructions and information.

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1.3 Supplementary documentation
1.3.1 Standard documents
ATEX test certificate
EMC certificate of conformity
QA documentation
Swiss Association for Technical Inspections (SVTI) test report (equipment for water-
polluting liquids)
1.3.2 Device-specific additional documentation
Technical data: VDT-aquasant_AS2.0-D24
Quick start guide (included with the delivery)

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2Safety instructions
2.1 General safety instructions
This device is built and tested in accordance with the safety requirements for electronic
instrumentation. It is only possible to guarantee that the device will function correctly and
that it can be operated safely if the generally applicable safety precautions and the device-
specific safety instructions in this operating manual are observed during use.
2.2 Authorised personnel
All the operations described in this documentation may only be carried out by trained
specialists who are authorised by the plant operator. Always wear the required personal
protective equipment when working on and with the device. The device is a piece of
electronic equipment for use in closed electrical operating areas to which only qualified
electricians or persons trained in electrical engineering have right of entry or access.
The personnel must meet the following requirements for their activities, such as
commissioning or maintenance:
‣Trained specialists have qualifications appropriate to the role and activity
‣Authorised by the plant operator
‣Familiar with national regulations
‣Instructions in the manual and additional documentation have been read and understood
‣Follow instructions and conditions
2.3 Intended use
•AS2.*-D24 with intrinsically safe Ex output on aquasant® liquid sensors, conductivity
detectors and NAMUR devices (ATEX Directive 2014/34/EU)
•Only connect suitable transducers
•The device may cause hazards if it is used improperly
•Only use insulated tools
•Only use original parts
2.3.1 Warning against misuse
The manufacturer is not liable for damage resulting from improper use or use that is not in
accordance with the intended purpose. Any other conditions of use negatively affect the
protection. It is not possible to guarantee that the device will function correctly.
2.4 Product safety
This device is built and tested to be operationally safe, according to the current state of the
art and good engineering practice. The device has left the factory in perfect condition in
terms of safety.
2.4.1 EU conformity
The device complies with the legal requirements of the applicable EU directives. The
directives are listed with the applied standards in the applicable EU declaration of
conformity. By affixing the CE mark, aquasant® confirms that the device has been successfully
tested.

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2.4.2 SIL conformity
SIL (Safety Integrity Level) 2 hardware/software according to IEC 61508.
Functional Safety of Electrical/Electronic/Programmable Electronic Safety-Related Systems.
2.4.3 RoHS conformity
This product complies with the provisions of Directive 2011/65/EU of the European
Parliament and of the European Council on the restriction of the use of certain hazardous
substances in electrical and electronic equipment (RoHS) and its amendments.
2.4.4 NAMUR Recommendations
NAMUR is the User Association of Automation Technology in Process Industries in Germany.
The recommendations issued by NAMUR are considered to be standards in field
instrumentation. The device meets the requirements of the following NAMUR
recommendations:
• NE 21 – Electromagnetic Compatibility of Equipment
• NE 53 – Compatibility of field devices and display/adjustment components
For more information, go to: www.namur.de.
2.5 Functional approvals
2.5.1 Switzerland; Swiss Association for Technical Inspections
(SVTI)/Swiss Conference of Heads of Environmental
Protection Services (KVU)
Approved for plant components for water-polluting liquids in Switzerland according to KVU
(Conference of the Heads of Environmental Protection Services in Switzerland).
Filling protection: KVU No.: 301.001
Special overspill protection: KVU No.: 302.004
Leakage monitoring: KVU No.: 321.003
2.5.2 Ex according to ATEX
Control devices with intrinsically safe output, approved for the connection of defined liquid
sensors, sensors and detectors in the Ex zone according to SEV ATEX21.
The EU type examination certificate must be observed. It is particularly important to
comply with the "Special conditions" contained in the certificate. Ex certification
according to Directive 2014/34/EU
Scan; PDF downloade: ATEX documentation

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3Product information
3.1 Basic functions
Limit monitoring is an important safety function to prevent overfilling of liquids in storage
tanks. Electro-optical overfill protection with the AS* control devices is proven technology
that is now moving to the next generation. The multi-functional control and monitoring
device can be universally parametrised with a wide range of sensors and is operated with 2-
or 3-wire sensors. The single-channel basic device allows you to add further basic devices
with SIL2 standards via the loop power supply. Further expansion sensor modules can also
be connected to a basic device.
The AS 2.2 D24 sensor modules expand the AS 2.0 D24 basic device with additional
intrinsically safe sensor outputs. The basic device handles the display for error message
monitoring from max. three expansion modules.
Figure 1 Row of control devices with TBUS connector
The AS2.0 basic module is monitored up to the sensor in accordance with the Namur EN107
standard. For the 3-wire electro-optical systems, the current sensor reading is monitored and
provides early warning of sensor failure, thereby assisting in the maintenance and servicing
of equipment. The basic device offers a wide range of alarm outputs.
Switch
contact
*ISB *ESB
Description LED indicator on
front
HL alarm
OUT 1
relay
0.5s
2s
Relay output; redundant, monitored
(SIL) with two independent switch-
over contacts
Yellow continuous
HL alarm
OUT 2
Opto
coupler
∆t
∆t
NPN open collector output; 0-60s
time delay
ON-delay or OFF-delay:
if the delay is active:
Yellow flashing
quickly for delay
time, then
Yellow continuous
HL alarm
OUT 3
relay
1s
1s
Relay output; can be acknowledged
via external button or "Reset" button
on front of device, potential-free
switch-over contact for an external
alarm (horn)
Yellow continuous,
flashing after
acknowledgement
Fault
message
K4 relay
1s
Relay switch contact
(Display with error message)
4-colour LED
according to Namur
*ISB=Immersion switching behavior / *ESB=Exchange switching behavior