ABB AWT420 Training manual
—
ABB MEASUREMENT & ANALYTICS | COMMISSIONING INSTRUCTION
AWT420
Universal 4-wire, dual-input transmitter
Measurement made easy
Introduction
The AWT420 is a universal 4-wire, dual-input
transmitter suitable for the measurement and
control of a wide range of parameters including pH,
ORP, conductivity, turbidity/suspended solids and
dissolved oxygen.
The AWT420 supports both traditional analog and
advanced digital EZLink sensors.
This Commissioning Instruction provides
installation, operation and maintenance procedures
for the AWT420 transmitter. For information on the
sensors, including installation, commissioning,
operation and maintenance procedures, refer to the
specific sensor manual.
For more information
Further publications for the AWT420 transmitter
are available for free download from:
www.abb.com/measurement
or by scanning this code:
Links and reference numbers for the transmitter
publications are also shown below:
Search for/click on:
Operating Instruction O
HART Communications Supplement
HART-EN
PROFIBUS Communications Supplement
PROFIBUS-EN
Ethernet Communications Supplement
ETHERNET-EN
—
AWT420
Universal 4-wire,
dual-input transmitter
2AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
Contents
1 Health & Safety ............................. 4
................................ 4
Safety precautions ................................ 4
Potential safety hazards ........................... 4
...............4
Safety standards .................................. 4
Product symbols .................................. 4
Product recycling and disposal
(Europe only).......................................5
End-of-life battery disposal ...................5
2011/65/EU (RoHS II) ...............................5
Cleaning ...........................................5
2 Cyber security...............................5
Communication protocol specific..............5
3 Overview....................................6
4 Mechanical installation.......................6
Transmitter installation............................ 6
Optional accessories..........................6
Location .....................................6
Sensor installation ................................ 6
Transmitter dimensions.......................7
Optional weathershield dimensions............7
Sensor modules ..............................7
Communication module.......................7
Wall-mounting................................7
Panel-mounting (optional) ....................8
Pipe-mounting (optional) .....................9
5 Electrical installation ...................... 10
Earth bonding.....................................10
Cable entries......................................10
Terminal connections..............................11
...12
Conductivity sensor module connections ...........12
2-electrode sensors..........................12
4-electrode sensors .........................12
pH and conductivity connections ..................13
pH/ORP/pIon sensor module connections.....13
Power supply connection ..........................14
Fitting the EZLink modules ........................16
Connecting EZLink sensors ........................18
Long cables .................................18
6 Easy Setup .................................18
7 Operation ..................................19
Front panel keys...................................19
Modes of operation .............................. 20
Operator menus.................................. 20
Operating modes .................................21
View mode....................................... 23
............................23
Signals View.................................23
Chart View ..................................23
Alarms View .................................23
Outputs View................................23
Log mode........................................ 24
Log entries ...................................... 24
8 Data logging .............................. 25
Removable SD card ..............................25
Removable media ................................ 25
.................... 25
9 Password security and Access Level......... 26
Setting passwords ............................... 26
Access Level ..................................... 26
10 Sensor setup ...............................27
2-electrode conductivity...........................27
dual input calculated values setup ................. 28
4-electrode conductivity ......................... 29
pH/Redox/ORP .................................. 30
..............................................31
Turbidity/Suspended solids .......................31
11 Specification ...............................32
Operation........................................ 32
Mechanical data .................................. 32
Security ......................................... 32
Electrical ........................................ 32
Analog outputs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Relay outputs .................................... 32
.............................. 32
Connectivity/Communications (optional).......... 33
..................................... 33
Environmental data .............................. 33
2-electrode conductivity.......................... 33
4-electrode conductivity ......................... 34
pH/ORP (Redox) ................................. 34
EZLink ........................................... 35
EMC ............................................. 35
Approvals, certification and safety ................ 35
AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B 3
12 Spares .....................................37
Sensor module assemblies.........................37
AWT420 pH PCB upgrade/spares kit ..........37
AWT420 2-electrode conductivity
PCB upgrade/spares kit ......................37
AWT420 4-electrode conductivity
PCB upgrade/spares kit ......................37
EZLink module assemblies .........................37
AWT420 EZLink PCB upgrade/spares kit ......37
Communications module assemblies ...............37
AWT420 HART PCB upgrade/spares kit........37
AWT420 Profibus PCB upgrade/spares kit.....37
AWT420 Modbus PCB upgrade/spares kit .....37
AWT420 Ethernet PCB upgrade/spares kit.....37
AWT420 analog output PCB upgrade/
spares kit ...................................37
Mounting kits .................................... 38
Panel-mount kit .............................38
Pipe-mount kit ..............................38
Wall-mount kit...............................38
Weathershield kits ............................... 38
Weathershield kit ............................38
Weathershield and pipe-mount kit ............38
Gland packs/EZLink connectors................... 38
Gland packs .................................38
EZLink connector assembly ..................38
4AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
1 Health & Safety
Document symbols
Symbols that appear in this document are explained below:
DANGER
The signal word ‘DANGER’ indicates an imminent danger.
Failure to observe this information will result in death or
severe injury.
WARNING
The signal word ‘WARNING’ indicates an imminent danger.
Failure to observe this information may result in death or
severe injury.
CAUTION
The signal word ‘CAUTION’ indicates an imminent danger.
Failure to observe this information may result in minor or
moderate injury.
NOTICE
The signal word ‘NOTICE’ indicates potential material
damage.
Note
‘Note’ indicates useful or important information about the
product.
Safety precautions
Be sure to read, understand and follow the instructions
contained within this manual before and during use of the
equipment. Failure to do so could result in bodily harm or
damage to the equipment.
WARNING
Bodily injury
Installation, operation, maintenance and servicing must be
performed:
• by suitably trained personnel only
• in accordance with the information provided in this
manual
• in accordance with relevant local regulations
Potential safety hazards
AWT420 transmitter – electrical
WARNING
Bodily injury
To ensure safe use when operating this equipment, the
following points must be observed:
• Up to 240 V AC may be present. Be sure to isolate the
supply before removing the terminal cover.
Safety advice concerning the use of the equipment
described in this manual or any relevant Material Safety
Company, together with servicing and spares information.
Safety standards
This product has been designed to satisfy the requirements of
IEC61010-1:2010 3rd edition ‘Safety Requirements for Electrical
Equipment for Measurement, Control and Laboratory Use’ and
complies with US NEC 500, NIST and OSHA.
Product symbols
Symbols that may appear on this product are shown below:
Protective earth (ground) terminal.
Functional earth (ground) terminal.
Alternating current supply only.
This symbol, when noted on a product, indicates a
potential hazard which could cause serious personal
injury and/or death. The user should reference this
instruction manual for operation and/or safety
information.
This symbol, when noted on a product enclosure or
barrier, indicates that a risk of electrical shock and/or
electrocution exists and indicates that only
individuals qualified to work with hazardous voltages
should open the enclosure or remove the barrier.
The equipment is protected through double
insulation.
Recycle separately from general waste under the
WEEE directive.
AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B 5
Product recycling and disposal
(Europe only)
ABB is committed to ensuring that the risk of any
environmental damage or pollution caused by any of
its products is minimized as far as possible. The
European Waste Electrical and Electronic Equipment
August 13 2005 aims to reduce the waste arising from
electrical and electronic equipment; and improve the
environmental performance of all those involved in
the life cycle of electrical and electronic equipment.
In conformity with European local and national
regulations, electrical equipment marked with the
above symbol may not be disposed of in European
public disposal systems after 12 August 2005.
NOTICE
For return for recycling, please contact the equipment
manufacturer or supplier for instructions on how to return
end-of-life equipment for proper disposal.
End-of-life battery disposal
The transmitter contains a small lithium battery (located on the
processor/display board) that must be removed and disposed
of responsibly in accordance with local environmental
regulations.
Information on ROHS Directive 2011/65/EU
(RoHS II)
ABB, Industrial Automation, Measurement &
Analytics, UK, fully supports the objectives of the
ROHS II directive. All in-scope products placed on the
market by IAMA UK on and following the 22nd of July
2017 and without any specific exemption, will be
compliant to the ROHS II directive, 2011/65/EU.
Cleaning
The complete transmitter can be hosed down if it has been
installed to IP66/NEMA 4X standards, i.e. cable glands are
correctly fitted and all unused cable entry holes are blanked off
page 11 and page 10.
Warm water and a mild detergent can be used.
2 Cyber security
This product is designed to be connected to and to
communicate information and data via a digital communication
interface. It is your sole responsibility to provide and
continuously ensure a secure connection between the product
and your network or any other network (as the case may be).
You shall establish and maintain any appropriate measures
(such as but not limited to the application of authentication
measures etc.) to protect the product, the network, its system
and the interface against any kind of security breaches,
unauthorized access, interference, intrusion, leakage and/or
theft of data or information.
ABB Ltd and its affiliates are not liable for damages and/or
losses related to such security breaches, any unauthorized
access, interference, intrusion, leakage and/or theft of data
or information.
Communication protocol specific
The HART protocol is an unsecured protocol, as such the
intended application should be assessed to ensure that these
protocols are suitable before implementation.
The Modbus protocol is an unsecured protocol, as such the
intended application should be assessed to ensure that these
protocols are suitable before implementation.
The PROFIBUS PA protocol is an unsecured protocol, as such
the intended application should be assessed to ensure that
these protocols are suitable before implementation.
the intended application should be assessed to ensure that
these protocols are suitable before implementation.
6AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
3 Overview
The AWT420 is a universal 4-wire single or dual-input
transmitter suitable for the measurement and control of a wide
range of parameters including pH, ORP, conductivity, turbidity/
suspended solids and dissolved oxygen (depending on the
module[s] fitted).
Sensor and communication modules plug directly into their
page
11 for module locations.
The AWT420 supports both traditional analog and advanced
digital EZLink sensors. The transmitter can be wall-, panel- or
page 7.
Information from the sensor is sent to the transmitter via a
sensor interface board. The process reading is displayed on the
main page and can be displayed as a graph in the Chart View
refer to page 23
messages inform the user of the system status and can be
logged for review. The system status can also be assessed
Ethernet communications.
Installation and commissioning is simplified with plug-and-play
digital sensor connections and automatic sensor recognition
and set-up.
Figure 1 AWT420 transmitter – main components
4 Mechanical installation
Transmitter installation
Optional accessories
Optional installation accessories:
• Cable gland kit
• Weathershield
• Panel-mount kit
• Pipe-mount kit
Location
For general location requirements refer to Figure 2. Select a
location away from strong electrical and magnetic fields. If this
is not possible, particularly in applications where mobile
communications equipment is expected to be used, screened
cables within flexible, earthed metal conduit must be used.
Install in a clean, dry, well ventilated and vibration-free location
providing easy access. Avoid rooms containing corrosive gases
or vapors, for example, chlorination equipment or chlorine gas
cylinders.
Figure 2 Transmitter location
Sensor installation
Refer to the associated sensor Operating Instructions for
installation procedures.
12345 6 7 8
GLASS
GUARD
REFERENCE
SOLUTION EA RTH
PT
PT
SCREEN
PT (3 rd)
12345 6 7 8
GLASS
GUARD
REFERENCE
SOLUTION EA RTH
PT
PT
SCREEN
PT (3 rd)
ANALOG
OUTPUT
pH INPUTpH INPUT
Keypad
Transmitter
door lock
Sensor modules
holder
Tamper-evident seal
attachment point
Analog output/
communication modules
Max. cable distance
transmitter to sensor
(refer to sensor Operating
Instructions)
0 to 95 % RH
non-condensing
Eye-level
location
Ambient temperature Humidity
Avoid vibration
min.
max.
AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B 7
Transmitter dimensions
Figure 3 Transmitter dimensions
Optional weathershield dimensions
Figure 4 Optional weathershield dimensions
Sensor modules
Sensor modules are fitted to the transmitter baseboard when
the transmitter is configured after being ordered.
Communication module
If an optional communication module is ordered, it is fitted to
the transmitter baseboard when the transmitter is configured
after being ordered.
Wall-mounting
NOTICE
If the optional weathershield Dis used, position it between
the transmitter and wall and pass 2 screws Cthrough
fixing holes (both sides) in weathershield.
Referring to Figure 5:
1 Position the left- and right-hand mounting brackets Ainto
the recesses on the rear of the transmitter as shown and
secure with the bracket securing screws. Ensure the plastic
washers remain in the positions fitted.
2 Mark fixing centers Band drill suitable holes in the wall.
3 Secure the transmitter to the wall using 2 screws Cin
each mounting bracket.
Figure 5 Wall-mounting the transmitter
16
(0.63)
10
(0.39)
144 (5.67)
164 (6.46)
99 (3.89)
73 (2.87)
144
(5.67)
209 (8.22) 175 (6.89)
200
(7.87)
A
B
Left hand bracket
right hand
bracket omitted
for clarity
62
(2.44)
152 (5.98)
Optional
weathershield
8AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
…4 Mechanical installation
…Transmitter installation
Panel-mounting (optional)
Referring to Figure 6:
1 Cut the correct sized hole in panel A.
2 Insert the transmitter into the panel cut-out B.
3 Screw one panel clamp anchor screw Cinto the left-hand
bracket Duntil 10 to 15 mm (0.39 to 0.59 in) of the thread
protrudes from the other side of the bracket and position
one clamp Eover the end of the thread.
NOTICE
The correct torque is critical to ensure proper compression
of the panel seal and achieve the IP66/NEMA 4X hosedown
rating.
4 Holding assembly Ftogether, position bracket Dinto the
left-hand recess on the rear of the transmitter and secure
with bracket securing screw G. Ensure that the plastic
washer remains in the position fitted.
5 Repeat steps 3 and 4 for the right-hand panel clamp
assembly.
6 Torque each panel clamp anchor screw to 0.5 to 0.6 Nm
Figure 6 Panel-mounting the transmitter
A
B
C
D
E
F
A
G
max. thickness 6 (0.236)
Gasket
Panel cut-out dimensions (glands not fitted)
30 (1.2)
73 (2.87) 25.5 (1.00)
138 +1.0
+0.04
(5.43 )
138 +1.0
+0.04
(5.43 )
30
(1.2)
AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B 9
Pipe-mounting (optional)
NOTICE
If the optional weathershield Fis used, locate it against
the transmitter back panel and attach the pipe-mount kit to
the weathershield rear face and transmitter.
Referring to Figure 7, secure the transmitter to a pipe as
follows:
1 Fit two M6 x 50 mm hexagon-head screws Athrough one
clamp plate as shown.
2 Using the appropriate holes to suit vertical or horizontal
pipe, secure the clamp plate to the pipe-mounting bracket
Busing two M6 x 8 mm hexagon-head screws and spring
lock washers C.
3 Position the pipe-mounting bracket into the recesses on
the rear of the transmitter as shown and secure with the
two bracket securing screws D. Ensure the plastic washers
remain in the positions fitted.
4 Secure the transmitter to the pipe using the remaining
clamp plate, spring lock washers and nuts E.
Figure 7 Pipe-mounting the transmitter
A
C
E
C
B
B
D
Pipe-mount kit
Vertical
pipe
Horizontal
pipe
Pipe diameters:
max. 62 (2.44)/min. 45 (1.77)
Weathershield
(see page 7 for
dimensions)
9
10 AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
5 Electrical installation
DANGER
Bodily injury
• Before making any connections, the external protective
earth stud must be connected to the local earth bonding
page 16.
•
device such as a switch or circuit breaker conforming to
local safety standards must be fitted to the final
installation. It must be fitted in close proximity to the
transmitter, within easy reach of the operator and marked
clearly as the isolation device for the transmitter.
• Remove all power from supply, relay, any powered control
circuits and high common mode voltages before
accessing or making any connections. For the mains
power, use 3-core cable rated 3A and for the relay
IEC 60245, or to the National Electrical Code (NEC) for
the US or the Electrical Code for Canada. The terminals
accept cables AWG 24 to 16 (0.2 to 1.5 mm2).
• All connections to secondary circuits must have insulation
to required local safety standards. After installation, there
must be no access to live parts, for example, terminals.
Use screened cable for signal inputs and relay
connections. Route signal leads and power cables
separately, preferably in an earthed (grounded) flexible
metal conduit.
USA and Canada only
• Supplied cable glands are an optional extra and provided
communication wiring ONLY. A special cable gland is
supplied with the Ethernet communications option and
should be used only for the Ethernet cable.
• The use of cable glands, cable/flexible cord for
connection of the mains power source to the mains input
and relay contact output terminals is not permitted in the
USA or Canada.
• For connection to mains (the mains input and relay
contact outputs), use only suitably rated field wiring
insulated copper conductors rated min. 300 V, 16 AWG,
90C. Route wires through suitably rated flexible conduits
and fittings.
WARNING
Bodily injury
• If the transmitter is used in a manner not specified by the
Company, the protection provided by the equipment may
be impaired.
• Figure 9, page
11 for fuse details.
• Replacement of the internal battery must be carried out
by an approved technician only.
• The transmitter conforms to Installation Category II of
IEC 61010.
• All equipment connected to the transmitter’s terminals
must comply with local safety standards (IEC 60950,
EN61010-1).
•
interface connectors must be connected to Safety Extra
Low Voltage (SELV) circuits.
Earth bonding
WARNING
Before making any electrical connections:
• The external protective earth stud (see Figure 11, page
15) must be connected to the local earth bonding point
using suitably sized ground cable. To connect to the
protective earth stud, use a closed M4 cable lug.
• Never connect the protective earth with an end sleeve or
an open cable lug.
Cable entries
A E
B F
C G
D
Figure 8 Cable entries
AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B 11
Terminal connections
Figure 9 Electrical connections overview
LN
+–
123456 78910 11 12 13 14 15 16 17 18 LN
Digital I/O
Digital I/O Common
OUT1 +
OUT1 –
OUT2 +
OUT2 –
N/O
N/C
COM
N/O
N/C
COM
N/O
N/C
COM
N/O
N/C
COM
Line
Neutral
12345
OUT3 +
OUT3 –
OUT4 +
GND
OUT4 –
12345678 123456 7 8
Communications Sensor 1Sensor 2
Analog output connections
(see below for communication
module connections)
Analog output/
communications module
PCB slot
refer to separate supplements:
HART COM/AWT420/HART-EN
PROFIBUS COM/AWT420/PROFIBUS-EN
ETHERNET COM/AWT420/ETHERNET-EN
AC
supply DC
supply
100 to 240 V AC ±10 %, 50/60 Hz
(90 min. to 264 V max. AC, 45/65 Hz)
100 to 240 V AC
15 W max.
Relay connections
Analog
output
connections
I/O
connections
(18 min. to 36 V max.)
Sensor module
connections
Sensor 1 and 2
module
locations
Main board
connections:
see below
Main board connections
WARNING
Bodily injury
Use fuse rating 500 mA (maximum)
WARNING
Bodily injury
Use fuse rating 2.5 A (maximum) type
12 AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
…5 Electrical installation
Digital I/O, relays and analog output
connections
Figure 10 Digital I/O, relays and analog output connections
Conductivity sensor module connections
2-electrode sensors
Sensor type RTD wiring
DRIVE +
1
2
3
DRIVE –
4
RTD 1
5
RTD 2
6
SHIELD
7
RTD 3
8
Red Black Green/Yellow Blue Brown
Red Black Brown Green/Yellow Blue
Red Blue Yellow
Green Black Blue Yellow
Green Black Blue/Red Yellow
Green Black Yellow Red Blue
attached cells
4-electrode sensors
Sensor type RTD wiring
DRIVE +
1
SENSE +
2
SENSE –
3
DRIVE –
4
RTD 1
5
RTD 2
6
SHIELD
7
RTD 3
8
Green Red White Black Blue Yellow
+
–
+
–
Relay and analog outputs
Relays (1 to 4)
Analog outputs (1 to 4)
500 Ω
max.
Digital output (open collector)
Load
Load
N/O
COM
N/C Load
PSU
AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B 13
pH and conductivity connections
pH/ORP/pIon sensor module connections
NOTICE
ORP (Redox) and Antimony pH sensors do not feature
temperature compensation therefore do not have
temperature sensors or related wiring.
Standard sensors without diagnostic functions
NOTICE
Ensure sensor diagnostics are Off when using standard
sensors without diagnostic functions.
Sensor type RTD wiring
SENSE
1
GUARD
2
REF
3
S.GND
4
RTD 1
5
RTD 2
6
SHIELD
7
RTD 3
8
Clear Black Red White
Blue Black Red White
Clear Black Red
Red White
Clear Black White Red Red
Blue Black Red White
Blue Black Red White Grey
Blue Black Red White Yellow
Blue Black Red White Yellow Grey
Standard sensors with diagnostic functions
NOTICE
Ensure sensor diagnostics are On when using standard
sensors with diagnostic functions.
Sensor type RTD wiring
SENSE
1
GUARD
2
REF
3
S.GND
4
RTD 1
5
RTD 2
6
SHIELD
7
RTD 3
8
Blue Yellow Black Green Red White
Clear Red Blue Green/Yellow Red White
Clear Red Blue Green/Yellow Red White Grey
14 AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
…5 Electrical installation
Power supply connection
WARNING
Bodily injuryUSA and Canada only
• The use of cable glands, cable/flexible cord for
connection of the mains power source to the mains input
and relay contact output terminals is not permitted.
NOTICE
Electrical installation – ABB recommendations:
• Ferrules are fitted to all cables.
• Use M4 ring terminals (crimped) on the earth conductor
prior to fitting to the earth stud on the gland plate
(plastic enclosure) or M5 ring terminals prior to fitting
to the earth boss (metal enclosure).
• Only 1 cable per cable gland.
Referring to Figure 11, page 15:
1 Using a suitable screwdriver, release door retaining screw
Aand open the transmitter door.
2 Release terminal cover retaining screw Band remove
terminal cover plate C.
3 Slide retaining clip Doff blanking plug Eand remove the
blanking plug if fitted.
4 Fit cable gland Fand secure using nut G.
5 Remove gland cover Hand route mains power supply
cable Ithrough it.
6 Route the cable through cable gland Fand into the
enclosure case.
NOTICE
Use a single-holed bush for the mains power cable.
7 Make connections to the power supply connection
terminals J. Connect earth wire Kto earth stud L.
8 Tighten gland cover H.
9 Refit terminal cover Cand secure it with retaining screw B.
10 Close the transmitter door and secure with door retaining
screw A.
AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B 15
Figure 11 Connecting the transmitter AC mains power supply
A
D
E
F
G
H
123456 7 8 12345 6 7 8
GLASS
GUARD
REFERENCE
SOLUTION EA RTH
PT
PT
SCREEN
PT (3 rd)
COMMUNICATIONS Sensor 1
C
B
L
LN
+ –
External protective earth stud
version
16 AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
…5 Electrical installation
Fitting the EZLink modules
WARNING
Bodily injury
• Up to 240 V AC may be present. Isolate the power supply
before removing the opening the transmitter door.
Referring to Figure 12:
1 Remove connector block cradle Afrom EZLink module(s)
and retain for connection.
2 Unlock and open transmitter door B.
3 Fit EZLink modules as follows:
a if one EZLink module is used, push-fit it into location C
(sensor 1).
Note. When fitting the cable assembly, the EZLink
connector for sensor 1 passes through cable entry D.
b if two EZLink modules are used, push-fit sensor 1 module
into location Cand sensor 2 module into location E.
Note. When fitting the cable assemblies, the EZLink
connector for sensor 1 passes through cable entry Dand
the EZLink connector for sensor 2 passes through cable
entry F.
Figure 12 EZLink module positions and EZLink cable entries
Referring to Figure 13:
4 Pass EZLink connector cable Gthrough the correct cable
5 Pass thread alignment washer Hover EZLink connector
cable G, ensuring alignment tab Iis orientated correctly.
6 Pass thread back nut Jover EZLink correctly connector
cable G.
Figure 13 Preparing EZLink connector cable fixings
B
A
DF
DF
CE
GG
H
I
J
AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B 17
Referring to Figure 14:
7 Fit alignment tab Iinto gland plate slot K(on plastic case
variant) or in the casting slot (on metal case variant).
8 Insert EZLink connector body Lfully into cable entry and
align the connector body using the flats on the alignment
washer (see Figure 13).
9 Screw back nut Jonto connector body and tighten using
a spanner.
Figure 14 Securing the EZLink connector cable assembly
Referring to Figure 15:
10 Place EZLink cable plug Minto EZLink connector block
cradle A.
11 Plug connector block cradle Ainto EZLink module N.
Figure 15 Connecting the EZLink cable assembly
12 If a second EZLink module is required, repeat all steps.
13 Close and lock transmitter door B.
I
J
K
L
18 AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
…5 Electrical installation
Connecting EZLink sensors
NOTICE
refer to sensor Operating instruction.
Referring to Figure 16:
1 Align the pins in sensor cable connector Awith the holes in
EZLink connector Band push the connectors together.
2 Turn nut Cclockwise to secure the connectors together.
The transmitter detects the type of sensor connected
automatically.
NOTICE
When installing sensor extension cables, ensure the male
end (end with label) of the cable is installed towards the
transmitter.
Long cables
If cables are longer than 30 m (94 ft), or they are outside, the
following cables must be screened or contained in conductive
conduit:
• digital I/O
• analog outputs
• communication
Figure 16 Connecting the sensor EZLink connector(s)
6 Easy Setup
When the transmitter is started up for the first time, or when
Restore defaults is selected from the Configuration/Device
Setup/Initial Setup menu (see page 29), the ‘Easy Setup’
prompt is displayed:
Press the key ( ) to start Easy Setup or press the key ( )
to cancel and exit to the main Operator page.
Press the key (Edit) to change the default value/setting to
the required value/selection. Press the key (Next) to accept
the default or revised value/selection and advance to the next
parameter.
Transmitter parameters that can be configured in this way are:
Language, Instrument Tag, Diagnostics View, Signals View,
Chart View, Alarm View, Analog OP View, Calibration Log,
Alarm Log, Audit Log, Diagnostics Log, Date Format and Date
& Time. On completion of Easy Setup, the display returns to the
Easy Setup start screen:
Press the key (Select) to revise/amend the settings just
made or press the key (Exit) to cancel and exit to the main
Operator page.
All transmitter parameters can be revised/changed at any time
by selecting Enter Configuration from any Operator or View
page menu, followed by Advanced from the Access Level menu.
NOTICE
• If Easy Setup does not detect a key press within 5
minutes, the display changes automatically to the main
Operator page.
• Refer to page 19 for details of menu navigation and
parameter selection/adjustment.
A
B
C
AW T420 03-09-2019
08:14:45
New TX
Detected
Start Easy
Setup ?
Menu
Easy Setup
Exit Select
AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B 19
7 Operation
Front panel keys
The transmitter is operated using the front panel keys.
Prompts associated with active keys are displayed on each
screen.
page 64, display icon
descriptions are detailed on page 27.
Figure 17 Front panel keys
Key Function Description
A
and Operator menu access key
When any Operating, View or Log page is displayed, opens or closes the Operator menu and
returns to the previous menu level.
BView key Toggles the view between Operator pages, View screens and Log.
NoteConfiguration mode.
CUp key Used to navigate up menu lists, highlight menu items and increase displayed values.
D Used to navigate down menu lists, highlight menu items and decrease displayed values.
EGroup key Toggles between:
• OperatorOperator page is selected with the View key.
• View screens (Diagnostics View, Signals View, Alarms View, and Outputs View) when the
Diagnostics View screen is selected with the View key.
• Log screens (Calibration Log, Alarm Log, Audit Log and Diagnostics Log) when the
Calibration Logs screen is selected with the View key.
See .
NoteConfiguration mode.
F
and Cal shortcut key
At menu level, selects the highlighted menu item, operation button or edits a selection. When any
Operator, View or Log page is displayed, used as a shortcut key to access the Calibrate level.
Table 1 Key functions
Figure 18 Menu navigation overview
Note.
The calibration log for a sensor (S1 to S2) is displayed only if that sensor is fitted.
Operator
Page 1
View
Signals
View
Chart
View
Alarms
View
Outputs
View
Calibration
Log S1
Calibration
Log S2
Alarm
Log
Audit
Log
Log
Operator
Page 2
Operator
Page 3
20 AWT420 | UNIVERSAL 4-WIRE, DUAL-INPUT TRANSMITTER | CI/AWT420-EN REV. B
…7 Operation
Modes of operation
accessed from the OperatorFigure 19:
• Operating: displays real-time sensor values on Operating
Pages page 21.
• View: displays diagnostic messages, alarms, output
values, signals (including the flow rate where applicable)
page 23.
• Log: displays recorded diagnostic, calibration and audit
page 24.
• Configuration
see page 27.
Operator menus
NOTICE
Operator menus cannot be accessed directly from the
Configuration level.
Referring to Figure 19:
• Operator menus Aare accessed from any Operator, View
or Log page by pressing the key B.
• Operator sub-menus (indicated by the arrow) are selected
by pressing the key C.
• The Calibrate page can be opened directly from an Operator
page (bypassing the Configuration level menus) using CAL
shortcut D. Press the key C(below the CAL prompt).
Figure 19 Operator menus
Operator menus comprise:
• Operator Pages: displays the Operator page for each
available sensor.
• Data Views: displays enabled data views.
• Logs: displays enabled Log views.
• Alarm Acknowledge: acknowledges the active alarm
displayed in the Alarms View.
• Manual Hold: holds (freezes) the current outputs and
alarms for the selected sensor(s).
NOTICE
Active values are still indicated on the display.
• Manual Clean: initiates a sensor cleaning cycle.
• Ack.Sensor Removed (displayed only if a sensor is
disconnected from the transmitter): confirms permanent
sensor removal and resets transmitter configuration
settings to factory default for the sensor input.
• Media Card
the operator to place the media online/offline.
• Autoscroll (enabled on Operator pages only): displays
Operator pages sequentially when multiple sensors are
fitted.
• Enter Configuration (enabled on all pages): enters
Configuration parameters via the Access Level page
26 for access levels and password security options.
In Configuration
CAL
A
BC
D
Au to scr oll
Manual Hold
Enter Conguration
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