ABB Industrial IT enabled 2600T Series User manual

- 1 -
Operating instruction
IM/262_4D_7 FieldIT
2600T Series Pressure Transmitters
Models 262B/D/V/P
Models 264B/D/V/P

- 2 -
Health and Safety
To ensure that our products are safe and without risk to health, the following points must be noted:
1. The relevant sections of these instructions must be read carefully before proceeding.
2. Warning labels on containers and packages must be observed.
3. Installation, operation, maintenance and servicing must only be carried out by suitably trained personnel and in accordance with the
information given. Any deviation from these instructions, will transfer the complete liability to the user.
4. Normal safety precautions must be taken to avoid the possibility of an accident occurring when operating in conditions of high
pressure and/or temperature.
5. Chemicals must be stored away from heat, protected from temperature extremes and powders kept dry. Normal safe handling
procedures must be used.
6. When disposing of chemicals ensure that no two chemicals are mixed.
Safetyadviceconcerningtheuseoftheequipmentdescribedinthismanualoranyrelevanthazarddatasheets(whereapplicable) may
be obtained from the Company address on the back cover, together with servicing and spares information.
The Company
We are an established world force in the design and manufacture of
instrumentation for industrial process control, flow measurement, gas and
liquid analysis and environmental applications.
As a part of ABB, a world leader in process automation technology, we offer
customers application expertise, service and support worldwide.
We are committed to teamwork, high quality manufacturing, advanced
technology and unrivalled service and support.
The quality, accuracy and performance of the Company’s products result from
over 100 years experience, combined with a continuous program of innovative
design and development to incorporate the latest technology.
The NAMAS Calibration Laboratory No. 0255(B) is just one of the ten flow
calibration plants operated by the Company, and is indicative of our dedication
to quality and accuracy.
UseofInstructions
Warning.
An instruction that draws attention to the risk of injury or
death.
Caution.
An instruction that draws attention to the risk of damage
to the product, process or surroundings.
Although Warning hazards are related to personal injury, and Caution hazards are associated with equipment or property
damage, it must be understood that operation of damaged equipment could, under certain operational conditions, result in
degraded process system performance leading to personal injury or death. Therefore, comply fully with all Warning and
Caution notices.
Informationinthismanualisintendedonlytoassistourcustomersintheefficientoperationofourequipment.Useofthismanual
for any other purpose is specifically prohibited and its contents are not to be reproduced in full or part without prior approval
of Technical Communications Department, ABB.
✶
Note.
Clarification of an instruction or additional information.
Information.
Further reference for more detailed information or
technical details.
ABB
EN ISO 9001: 1994
Cert. No. Q5907
ISO 9001: 2000
Cert. No. 9/90A
Cert. No. 0255
0255

- 3 -
Section Page
INTRODUCTION............................................................3
TRANSPORT, STORAGE, HANDLING AND
PRODUCT IDENTIFICATION........................................4
PRINCIPLE OF OPERATION ........................................5
INSTALLATION..............................................................7
ELECTRICAL CONNECTIONS .....................................8
ELECTRICAL REQUIREMENTS ................................10
RANGE AND SPAN CONSIDERATION ......................10
CALIBRATION .............................................................11
DISMANTLING AND REASSEMBLY ..........................13
SIMPLE FAULT FINDING............................................16
RETURNING FORM ....................................................17
ADDENDUM FOR "METERS" OPTION OF
THE TRANSMITTERS .................................................18
ADDENDUM FOR COMETER - ANALOG LCD
INDICATOR WITH HART PROGRAMMING
CAPABILITY AND PROMETER
PROGRAMMABLE INDICATOR..................................25
ADDENDUM FOR PV-SCALING OPERATION...........30
ADDENDUM FOR "SURGE PROTECTOR" OPTION
OF THE TRANSMITTERS ...........................................31
ADDENDUM USE OF HARDWARE LINKS
ON THE SECONDARY ELECTRONICS .....................34
ADDENDUM FOR DIFFERENTIAL PRESSURE
TRANSMITTERS : SELECTABLE OUTPUT
FUNCTIONS ................................................................36
ADDENDUM FOR FLANGE-MOUNTED
TRANSMITTERS .........................................................42
ADDENDUM FOR "EX SAFETY" ASPECTS
AND "IP" PROTECTION (EUROPE) ...........................48
CONTENTS INTRODUCTION
The 2600T series is a modular range of field mounted, micro-
processor based electronic transmitters, using a unique
inductive sensing element. Accurate and reliable
measurement of differential pressure, gauge and absolute
pressure, flow and liquid level is provided, in the even most
difficult and hazardous industrial environments.
The 2600T Smart series transmitter now includes an Analog
Version plus HART digital communication, a Profibus DP-PA
and a Fieldbus FOUNDATION version.
Digital communication protocols allow remote re-ranging,
calibration and diagnostics.
With respect to HART, the bidirectional digital communication
does not have any interference with the standard 4-20 mA
analog output signal.
Profibushasacompletedigitalonlycommunication,aswellas
for Fieldbus FOUNDATION.
This manual describes the features, the installation and
calibrationproceduresrelatedtothe2600TSeriesTransmitter
with HART Communication Protocol.
The 2600T series also gives the opportunity to utilize
capacitive and piezo-resistive sensing element for certain
models and applications.
SUPPLEMENTARY DOCUMENTATION
Reference information on remote seals and configuration of
the transmitter can be found in the following documents:
SS/S264x Remote Seal Specification
SS/264xx Data Sheets
SL/2600T Spare Part List
IM / 691HT Hand-Held Communicator
Online HELP SMART VISION Configuration Program

- 4 -
Important - The instrument serial number must always be quoted when making enquiries.
PRODUCT IDENTIFICATION
The instrument is identified by the data plates shown in
Figure 1.
The Nameplate (ref.A) provides information concerning the
codenumber,maximumprocessworkingpressure,rangeand
span limits, power supply and output signal. See code/
specification sheet for detailed information. This plate also
shows the transmitter serial number.
Please refer to this number when making enquiries.
Adedicated label (ref.B) is weldedas standardtothe primary
unit, carrying specific details of the transducer (diaphragms
material, fill fluid, range limit and identification number).
A Safety Marking plate ( ref. C) is fitted when the transmitter
is required to comply with hazardous area regulations, e.g.
flameproof, intrinsic safety or both protection type combined.
Additionally Tag plate (ref. D) provides the customer tag
number and calibrated range, maximum process working
pressure (PS) and temperature (TS).
The instrument may be used as a safety accessory (category
IV)as definedbythePressureEquipment Directive97/23/EC.
In this case, near the CE mark, there is the number of the
notified body (1130) that verified the compliance.
Fig. 1 - Product identification
Ref. B
Primary Unit
Ref. A
TRANSPORT
After final calibration, the instrument is packed in a carton
(Type 2 to ANSI/ASME N45.2.2-1978), intended to provide
protection from physical damage.
STORAGE
The instrument does not require any special treatment if
stored as despatched and within the specified ambient
conditions level (Type 2 to ANSI/ASME N45.2.2-1978).
There is no limit to the storage period, although the terms of
guarantee remain as agreed with the Company and as given
in the order acknowledgement.
HANDLING
The instrument does not require any special precautions
during handling although normal good practice should be
observed.
Ref. C
Ref. D
Ref. D
Ref. A
DIN TYPE
HOUSING
BARREL TYPE
HOUSING
SERIAL
NUMBER
URL
DIAPHRAGM
MATERIAL
FILL
FLUID

- 5 -
The instrument consists of two functional units:
- Primary Unit
- Secondary Unit
The Primary Unit includes the process interface and the
sensor,theSecondaryUnitincludestheelectronics,theterminal
blockandthehousing. Thetwounitsaremechanicallycoupled
byathreadedjoint.TheElectronicsof SecondaryUnitisbased
on custom integrated components (Application Specific
Integrated Circuit - ASIC).
Theprincipleofoperationofthe PrimaryUnitisasfollows.The
process fluid ( liquid, gas or vapour ) exerts pressure on to the
sensor diaphragm via flexible, corrosion-resistant isolating
diaphragms and capillary tubing containing the fill fluid (see
Fig. 2a). This is for inductive principle.
As the sensor diaphragm deflects in response to differential
pressurechanges,itsimultaneouslyproducesvariationsinthe
gap between two fixed magnetic circuits (comprising coil and
ferrite core) positioned on both sides of the measuring
diaphragm. As a result, the inductance of each coil changes.
The two inductance values L1 and L2, and the sensor
temperature ST are combined in the primary electronics to
provide a proprietary standardized signal.
Inthemanufacturingprocessthesensoroutputcharacteristics
arecomparedwithreferencepressuresandtemperatures:the
"mapped"parametersarethenstoredinthememoryofPrimary
electronics.
Resin potting
Primary Electronics
Printed Circuit
Sensor Diaphragm
with Ferrite Disks
Process
chamber
Capillary tubing
Inductance Coils
& Magnetic
Cores
Isolating
diaphragm
Fig. 2a - Primary Unit
PRINCIPLE OF OPERATION
Whilemaintainingthemodularconstruction,itmaybeadopted
a sensor module different then the inductive one. The sensor
can be piezoresistive. The completely welded sensor module
isatwin-chambersystemwithanintegraloverloaddiaphragm,
an internal absolute pressure sensor and a silicon differential
pressure sensor.
The absolute pressure sensor, which is only exposed to the
pressure at the high pressure side, acts as a reference value
to compensate for the static pressure.
The differential pressure sensor is connected via a capillary
tube to the negative side / the reference vacuum of the sensor
module. The applied differential pressure (dp) / absolute
pressure (pabs) is transferred via the separating diaphragm
and the fill fluid to the diaphragms of the silicon differential
pressure sensor.
A minimal deflection of the silicon diaphragm changes the
output voltage of the pick-up system. This output voltage,
proportionaltothe pressure,is convertedbythe matchingunit
and the amplifier into an electrical signal.
Depending on the model, the transmitter is connected to the
processbymeansofovalflangeswithfixingthreadsaccording
toDIN19213(M10/M12)or7/16-20UNF,1/4-18NPTFemale
thread or remote seal.
Themeasuredvaluesandthesensorparametersaretransferred
to the Secondary Unit, where a microprocessor computes
precise primary output linearisation, compensating for the
combinedeffectsofsensornonlinearity,ofstaticpressureand
temperaturechanges.Inthesecondaryelectronics permanent
memory are stored the transmitter specific information:
- non modifiable data such as the serial number, the UID
(UniqueIdentifier),themanufacturer'snameanddevicetype,
the hardware and software version of the electronics.
- themodifiabledatasuchasthefinaltrimmingandcalibration,
in other words, all data that can be changed by the user
through the configuration devices.
Capillary tubing
Process
chamber
Isolating
diaphragm
Fig. 2b - Piezoresistive sensor
for differential pressure
Microprocessor-based
electronics
Matching
Isolating diaphragm
dp - sensor
Pabs - sensor
Filling liquid
Process connection
Overload diaphragm
Sensor body
MODELS: 262/264 D-V-P
MODELS 262/264 B

Withsecondary electronicsanalog+HART, itistobe consider
that different communication protocols exist for configuration
and maintenance operations. Here follows a brief description
onthematter;pleaserefertoappropriatetechnicalspecification
for additional deeper explanations on the communication
aspects.
The HART protocol is based on the standard Bell 202 FSK
(Frequency Shift Keying ) with a ±0.5 mA signal modulation
superimposed on the 4 to 20 mA analog signal. As the energy
balance added to the current loop is virtually zero and the
frequencyisveryhighcomparedtothatoftheprocessdynamic,
the analog process signal remains undisturbed.
. . . PRINCIPLE OF OPERATION
Internal Serial Bus
Parallel Bus
SENSOR
INTERFACE DIGITAL
CONVERTER
123456789012345678
1
2345678901234567
8
1
2345678901234567
8
1
2345678901234567
8
123456789012345678
MICRO
CONTROLLER
EXT. ADJ
INTERFACE MEMORY
4 to 20 mA
CONVERSION
MEMORY
Primary electronics
(located in the
Primary Unit)
Sensors
Internal bus
Fig. 3 - Functional Block Diagram
MODEM FSK
COUPLER
Zero
Span
Secondary Electronics
(located in the
Secondary Unit)
4 to 20 mA
Output
The microprocessor receives data from the internal modem, in order to provide bidirectional digital communication with the
configuration device, i.e. the Hand Held terminal "Communicator" or P.C. based "Configurator".
Using a configuration device it is then possible to remotely
modifythe configurationofthe transmitter,e.g. themeasuring
range.
It isalsopossibletoreadother transmitterdataanddiagnostic
information. Limitedrezeroingandrespanning,comparableto
that conventional analog transmitters is possible using the
optionalcalibration device.Referto Fig.3 for acomplete view
of the Functional Block Diagram.
The sensor and all electronic parts are galvanically isolated
from the transmitter body.
- 6 -
External Zero/Span
adjustments
Fig. 2d - Secondary Unit
Output meter
(option) Surge protector
(option)
Terminal
block
Housing Electronics
Integral meter
(option)
RFI filter

INSTALLATION
- 7 -
Fig. 5 - Mounting on 2" horizontal pipe
CAUTION - Proper location of the transmitter
withrespecttotheprocesspipewilldependupontheservice
forwhich theinstrumentisused. Careshould beexercised
to identify correct process connections.
Fig. 6 - Dimensional drawings (Differential pressure transmitter) with process connections
Fig. 4 - Mounting on 2" vertical pipe
Note: High side may be marked H or +
Low side may be marked L or -
WARNING -ForinstallationinHazardousAreas,i.e.
areas with dangerous concentrations of e.g. gases or
dusts that may explode if ignited, the installation must be
carriedoutinaccordancewithrelativestandardseitherEN
60079-14 or IEC 79-14 and/or with local authority
regulations, for the relevant type of protection adopted.
Together with safety information here and after enclosed
see also the Addendum for "Ex Safety" aspects which is
part of this instruction manual.
WARNING - In order to ensure operator safety and
plant safety it is essential that installation is carried out by
suitably trained personnel according to the technical data
providedintheDataSheetfortherelevantmodelincluded
in the supplementary documentation, in particular in the
"Operative limits" section.
The transmitter may be mounted on a vertical or horizontal 2-
inchpipe(figg.4and5)bymeansofthesamemountingbracket.
Note: for other installation details see the relevant
Addendum.
WARNING: The transmitter when installed in
accordance with this instruction manual will not be
subjected to mechanical stresses.
WARNING: the transmitter should not be installed
where it may be subjected to mechanical and thermal
stresses. ABB cannot guarantee that a construction
material is suited to a particular process fluid under all
possible process conditions. Therefore it is the user
responsibility the selection of suitable wetted parts
materials and filling fluid.
The secondary unit of the transmitter may be rotated through
360°approx. with respect to the primary unit without degrading
performance or damaging the internal wiring. Do not force the
primaryunit torotate; usethe2mm Allen keysupplied tounlock
andlock thetanggrub screw(seeFig. 7).Thisfeature,obtained
by unscrewing (one turn is sufficient) the Allen screw, is
particularly useful for reaching optimum access to the electrical
connections and visibility of the output indicator.
135 (5.31)
127 (5.00)
17
(0.67) 26
(1.02) 17
(0.67)
36
(1.42)
+
11 (0.43)
102 (4.02)
84 (3.31)
41.3 (1.63)
63 (2.48)
167 (6.57)
S
N
O
S
S
T
I
U
C
R
I
C
S
E
L
N
O
I
N
E
T
S
O
S
T
U
R
R
E
V
U
O
C
E
L
R
E
D
R
A
G
T
N
E'
M
E
F
N
E
B
E
L
C
I
Q
U
A
T
E
A
L
S
T
I
U
C
R
I
C
I
V
E
H
C
O
P
E
E
K
V
E
R
T
I
G
T
E
H
W
N
!
86 (3.39)
Process connections
Note: dimensions are expressed in mm. (Between parenthesis the same dimensions expressed in inches).

- 8 -
M
TEST COMM
WARNING- ForinstallationinHazardousAreas,i.e.
areaswith danger offire and/orexplosion, priortomaking
electrical connections, ensure compliance with safety
informationonthe SafetyMarkingplate.Failure tocomply
with this warning can result in fire or explosion.
Signal terminals are located in a separate compartment of the
secondary unit housing. The housing incorporates two con-
nection ports for cable glands or conduit fittings. They are
protected with a temporary plastic plug for transit purpose
whichshouldbereplacedwithasuitablepermanentpluginthe
unusedport. Connectionscanbemadebyremovingthecover
(indicatedinFig.7);firstscrewdown thelockingscrewlocated
below the cover, using a 3 mm Allen Key.
WARNING - For Hazardous Areas installations,the
connectionof cablesand conduitsto thetransmittershall
be made in accordance with the requirements of the
relevanttypeofprotection.Cablesandcable-glandsmust
be in accordance with the type of protection.
Unused openings for connection shall be closed with
blanking elements suitable for the relevant type of
protection. With the exception of intrinsically safe
transmitters, the means provided for this shall be such
that the blanking element can be removed only with the
aid of tools. The blanking elements must be certified for
thetypeofprotection.Seestandardseither EN60079-14
or IEC 79-14. The transmitter connections must also
guarantee the degree of protection of the transmitter
enclosure, e.g. IPxx according to EN 60529 standard (or
IEC529).See alsotheAddendum for"IP"protection (and
Ex Safety) which is part of this instruction manual.
Thesignalcableshould beconnectedto theterminalsmarked
respectively (+) and (-). If an internal output meter - either with
analog or digital indication - is installed, it should be removed
inordertomaketheconnection,simplybypullingitoutfromits
socket. After the connections have been made, reinstall the
output meter. Refer to the Meters Option addendum for
details.
Fig. 7 - Location of the locking screws and terminals
Grub
screw
ELECTRICAL CONNECTIONS
The power to the transmitter is supplied over the signal wiring
and noadditionalwiringis required.Thesignalwiringdoesnot
need to be shielded but the use of a twisted pair is highly
recommended. The cable shield should be grounded in one
side only, to avoid dangerous earth paths.
WARNING - For Hazardous Areas installations,
when the ambient temperature is higher than 70°C, the
cable used for the connections must be suitable for 5°C
above the ambient temperature.
Normal practice is to ground in the control room side, in which
case the field side of the screen should be adequately
protected to avoid contact with metallic objects. Signal wiring
may be ungrounded (floating) or grounded at any place in the
signalloop,butfor intrinsicallysafeinstallations thewiringand
groundingmustfollowthespecificrulesforthistechnique. The
transmitter case may be grounded or ungrounded: a ground
connectionisprovidedinternally(intheterminal compartment)
and externally.
Do not run the signal wiring in close proximity to power cable
or high power equipment; use dedicated conduits or trays for
signal wiring.
CAUTION - Do not connect the powered signal
wiring to the mA signal testing terminals as this could
damage the by-pass diode.
Aftertheconnectionshavebeencompletedchecktheintegrity
of the cover O-ring, screw down the cover and secure it by
unscrewing the safety screw.
CAUTION - Unless absolutely necessary, avoid the
removalonsiteoftheprotectivecoverwhichgivesaccess
totheelectroniccircuitry.Althoughtheelectronicsarefully
tropicalized they should not be subjected to humidity for
long periods.
WARNING - For Hazardous Areas installations, at
least eight (8) threads on each cover must be engaged in
order for the transmitter to meet (flameproof - explosion-
proof) requirements.
Secondary Unit
Cover locking
screws (in the
position
indicated by
the arrows)
Primary
Unit
Remove
this cover
to access
terminals
Hand Held Communicator
Terminals
Test Terminals
Output
Meter
Socket
Ground Terminal
Signal Terminals
Fig. 8a - Terminals arrangements
Short
circuit link

- 9 -
. . . ELECTRICAL CONNECTIONS
WARNING : DO NOT ATTEMPT TO CONNECT
AN AMPEROMETER BETWEEN A "TEST" TERMINAL
AND A "COMM" TERMINAL. THE RESULT TO THE
POWER SUPPLY IS A SHORT WHICH WILL BLOW
FUSESANDPOSSIBLYDAMAGEYOUREQUIPMENT,
ALSO CAUSING TO INTERRUPT FUNCTION OF
OTHER DEVICES POWERED FROM SAME SUPPLY.
NOTE: If the use of the Hand Held Communicator is
foreseen, a resistance of 250 ohms minimum must be
includedinthecurrentloop,betweenthepowersupplyand
the connection point of the Hand Held Terminal, for
communication purpose.
Here below is given an explanation regarding the possible
connection of the terminal block to the power supply and a
representation of the connection in case of remote indicator
presence.
Fig. 8b - Electrical connections
Fig. 8c - Electrical connections with remote indicator
+
+
-
-
+
+
-
-
Line load
GND
Hand-held
communicator
Power
source
Optional
Receiver
Test points
4-20 mA
250 ohm min
Internal ground
termination point
691HT
A B C
1D E F 2G H I 3
J K L
4M N O 5P Q R 6
S T U
7V W X 8Y Z # 9
@ % & /
0+
-
PV
REVIEW SERIAL
LINK
TRIM
F1 F2 F3 F4
CONF
External ground
termination point
M
TEST COMM
+
+
-
-
+
+
-
-
Line load
GND
Hand-held
communicator
Power
source
Optional
Receiver
Test points
4-20 mA
250 ohm min
Internal ground
termination point
Remote indicator
691HT
A B C
1D E F 2G H I 3
J K L
4M N O 5P Q R 6
S T U
7V W X 8Y Z # 9
@ % & /
0+
-
PV
REVIEW SERIAL
LINK
TRIM
F1 F2 F3 F4
CONF
External ground
termination point
M
Kent-Taylor
0
4
3
5
6
7
8
9
10
20
40
0
60
100
%
2
80
M+
-
TEST COMM
Model 691HT Communicator
may be connected at any wiring
termination point in the loop,
providing the minimum
resistance is 250 ohm.
If this is less than 250 ohm,
additional resistance should be
added to allow communications.

- 10 -
The 2600T Transmitter Specification Sheets provide all
informationconcerningtheRangeandSpanlimitsinrelationto
the model and the sensor code.
The terminology currently used to define the various
parameters is as follows:
URL : Upper Range Limit of a specific sensor. The highest
value of the measured value that the transmitter can be
adjusted to measure.
LRL:LowerRangeLimitofaspecificsensor.Thelowestvalue
of the measured value that the transmitter can be adjusted to
measure.
URV : UpperRangeValue.Thehighestvalueofthemeasured
value to which the transmitter is calibrated.
LRV : LowerRange Value.Thelowest valueof themeasured
value to which the transmitter is calibrated.
SPAN : ThealgebricdifferencebetweentheUpperandLower
Range Values. The minimum span is the minimum value that
canbeusedwithoutdegradationofthespecifiedperformance.
TURNDOWNRATIO: istheratiobetweenthemaximumspan
and the calibrated span.
The transmitter can be calibrated with any range between the
LRL and the URL with the following limitations:
LRL ≤LRV ≤(URL - CAL SPAN)
CAL SPAN ≥MIN SPAN
URV ≤URL
RANGEANDSPANCONSIDERATION
The total loop resistance is the sum of the resistance of all
elements of the loop, including wiring, conditioning resistor,
safety barriers and additional indicators (excluding the
equivalent resistance of the transmitter).
Where a configuration device (HART), such as the Hand Held
Communicatoror aModem islikely tobeused,aresistance of
250 ohm minimum should be present between the power
supply and the point of insertion of these devices, to allow
communication.
Severaltypesofsafetybarriers,eitherpassiveoractive,canbe
satisfactorily used in conjunction with the Smart 2600T
transmitter. Nevertheless, in case of use of active barriers,
check with the supplier if the model is suitable for use with
smarttransmittersallowingtheconnectionoftheconfiguration
devices in the "safe" or non-hazardous area.
Note - For models 262B and 264B the frequency
immunitybetween150kHzand2MHzwithdirect coupling
and unshielded line is 3 V; with direct coupling and
shielded line is 10 V.
WARNING - The transmitter may be used as a
safety accessory (as defined by the Pressure Equipment
Directive 97/23/EC) i.e. as part of a shutdown system.
Inthiscaseitisrecommendedtoselectthecorrectfailsafe
mode for the 4-20 mA signal (as per Namur NE43
recommendation).
Seealsotheinstructionsrelevanttofailsafeselection(Up/
Down scale mode) in the addendum to the instruction
manual on "Use of hardware links on the secondary
electronics" .
ELECTRICAL REQUIREMENTS
Thetransmitteroperatesonaminimumvoltageof10.5Vdcto
a maximum of 42 Vdc and is protected against polarity
inversion.
Note - The transmitter operates from 10.5 to 42
Vdc with no load (additional load allows operation
over 42 Vdc). For EEx ia and intrinsically safe (FM,
CSA and SAA) approval power supply must not
exceed 30 Vdc.In some countries the maximum
power supply voltage is limited to a lower value.
Installing optional devices the minimum voltage increases to:
- 10.5 Vdc with no option or with integral digital display
- 10.7 Vdc with output analog indicator
- 12.5 Vdc with LCD ProMeter
- 12.3 Vdc with surge protection
- 13.3 Vdc with LCD CoMeter
- 15.3 Vdc with no link on output indicator plug
Thetotal loopresistanceis indicatedin theexpressionbelow.
R (kΩ) = Supply voltage - min. operating voltage (Vdc)
22.5