Endress+Hauser Prothermo NMT 538 User manual

Endress+Hauser
Systems & Gauging
BA 020N/08/en/11.02
Software version 6.xx Temperature
Prothermo NMT 538
Operating Manual

Prothermo NMT 538
2Endress+Hauser Systems & Gauging
Table of Contents
General notes
Safety instructions
Designated use
1.1
1.2 Installation, commissioning and operation
1.3
1.4
1.5
Operation safety
Return
Notes on safety conventions and symbols
Safety instructions
Device designation
2.1 Nameplate
2.1.1 Ordering structure
2.1.2 Specifications
2.1.3
Installation
Incoming acceptance, transport, storage
3.1 Incoming acceptance
Transport
3.1.2 Storage
3.1.3
3.1.1
Installation conditions
3.2 Dimensions
3.2.1
Mounting
3.3 Mechanical connection
3.3.1 Wiring: NMT538 to RTD probe
3.3.2
HART line cabling
3.4 Protection from line noise
3.4.1 Connection to the Proservo NMS53x
3.4.2 Connection to
3.4.3 the Tank side monitor NRF590
Calculation of average temperature
NMT538 operation
5.1
Home position display
5.1.1 Optical key
5.1.2
Access code
5.1.3 Type of
5.1.4
Configuring the NMT538 on
5.1.5 the matrix of Proservo NMS53x
Setting parameter on the matrix
5.1.6 Additional parameter
5.1.7
The Proservo NMS53x matrix
5.2 (NMT538 related matrix only)
Description of the programming matrix
5.3
Operation Principle
Operation with
the Tank Side Monitor NMF 590
Initial NMT538 configuration
6.1 before connect to NRF590
Additional adjustment factors
6.2 NMT538 operation from NR
6.3
Configuration from
ToF (Time of Flight) tool
Error code
Appendix
4
6
9
23
40
41
42
44
4
4
4
4
5
6
6
7
8
9
9
9
9
10
11
11
13
18
18
19
20
21
22
23
23
23
24
25
26
27
30
31
35
39
39
39
Operation Principle
High Accuracy Converter
4.1 Temperature calculation
4.2 4.2.1 in the liquid layer
Calculation of average temperature
4.2.2
in the liquid gas / vapor layer
21
22
22
the Proservo NMS53x
with
(touch control) operation
the Programming Matrix group
setting functions
10
3

Prothermo NMT 538
Endress+Hauser Systems & Gauging 3
General notes
Instruction manual
•This instruction manual applies to the NMT538 with V.6x software installed.
•Please read this manual carefully and make sure you understand its contents before using the
product.
•This manual is solely intended to describe product functions and should not be used for any
other purpose.
•No part of this manual may be reproduced or reprinted without permission.
•This manual may be subject to change without prior notice.
•This manual waspreparedwith the highest degree of care. However, should you find any errors
or have any questions, contact one of our service offices or your local sales agent.
Product Requirements
Power source
Check the voltage of the power supply before connecting it to the product. It should be the exact
voltage required for proper operation of the product.
Use in hazardous areas
When using the product in a first or second-class hazard location (Zone 1 or Zone 2) be sure to
use an intrinsically safe or pressure- and explosion-proof apparatus. Take the utmost care during
the installation, wiring, and piping of such an apparatus to ensure the safety of the system. For
safety reasons, maintenance or repairs on the product while it is being used with such on
apparatus should only be performed by qualified personnel.
External connection
When an external connection is required, the product should be protectively grounded before it
is connected to a measurement object or an external control circuit.
General notes

Prothermo NMT 538
4Endress+Hauser Systems & Gauging
1 Safety instructions
1.1 Designated use
The Prothermo NMT538 temperature signal converter is designed to be connected to RTD type
Intrinsically safe average temperature probe. Use for purpose other than originally intended may
cause failure. Failure may occur if the inappropriate probe is connected or as a result of improper
operation. Carefully read this instruction manual before attempting to use the NMT538 and
connection to the desired temperature probe.
Caution!
Before opening the cover of the Prothermo NMT538 for maintenance, switch off the power supply
of the Proservo NMS53x or the Tank side monitor NRF590.Eitherof described instruments are the
host gauge for supplying DC voltage on the HART line.
1.2 Installation, commissioning and operation
•Mounting,electricalinstallation,start-upandmaintenanceoftheinstrumentmayonlybecarried
out by trained personnel authorized by the operator of the facility.
•Personnel must absolutely and without fail read and understand this Operating Manual before
carrying out its instructions.
•The instrument may only be operated by personnel who are authorized and trained by the
operator of the facility. All instructions in this Manual are to be observed without fail.
•The installer has to make sure that the measuring system is correctly wired according to the
wiring diagrams. The measuring system is to be grounded.
•Please observe allprovisions valid for your country and pertaining to theopening and repairing
of electrical devices.
1.3 Operational safety
Hazardous areas
Measuring systems for use in hazardous environments are accompanied by separate "Ex
documentation", which is an integral part of this Operating Manual. Strict compliance with the
installation instructions and ratings as stated in this supplementary documentation is mandatory.
•Ensure that all personnel are suitably qualified.
•Observe the specifications in the certificate as well as national and local regulations.
Fcc approval
This device complies with part 15 of the FCC Rules. Operation is subject to the following two
conditions: (1)This device may not cause harmful interference, and (2) this device must accept
any interference received, including interference that may cause undesired operation.
Caution!
Changes or modifications not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.
1.4 Return
The following procedure must be carried out before a transmitter is sent to Endress+Hauser for
repair.
•Always enclose a duly completed "Hazardous Substance Data sheet" form. Only then can
Endress+Hauser transport, examine and repair a returned device.
•Enclose special handling instructions if necessary, for example a safety data sheet as per
EN 91 / 155 / EEC.
•Remove all residue which may be present. Pay special attention to the gasket grooves and
crevices where fluid may be present. This is especially important if the fluid is dangerous to
health, e.g. corrosive, poisonous, carcinogenic, radioactive, etc.
Note!
A copy of the "Hazardous Substance Data sheet" is included at the end this operating manual.
1 Safety instructions

Prothermo NMT 538
Endress+Hauser Systems & Gauging 5
Caution!
•No instrument should be sent back for repair without all dangerous material being completely
removed first, e.g. in scratches or diffused through plastic.
•Incomplete cleaning of the instrument may result in waste disposal or cause harm to personnel
(burns, etc.). Any costs arising from this will be charged to the operator of the instruments.
1.5 Notes on safety conventions and symbols
In order to highlight safety-relevant or alternative operating procedures in the manual, the
following conventions have been used, each indicated by a corresponding symbol in the margin.
Protection from line noise.
Symbol Meaning
Warning
A warning highlights actions or procedures which, if not performed
correctly, will lead to personal injury, a safety hazard or destruction
of the instrument.
Caution!
Caution highlights actions or procedures which, if not performed
correctly, may lead to personal injury or incorrect functioning of the
instruments.
Note!
A note highlights actions or procedures which, if not performed
correctly, may indirectly affect operation or may lead to an
instrument response which is not planned.
Device certified for use in explosion hazardous area
If the Micropilot has this symbol embossed on its name plate it can
be installed in an explosion hazardous area.
Explosion hazardous area
Symbol used in drawings to indicate explosion hazardous area.
- Devices located in and wiring entering areas with the designation
"explosion hazardous areas" must conform with the stated type of
protection.
Safe area (non-explosion hazardous area)
Symbol used in drawings to indicate, if necessary, non-explosion
hazardous areas.
- Devices located in safe areas still require a certificate if their
outputs run into explosion hazardous areas.
Direct voltage
A terminal to which or from which a direct current or voltage may
be applied or supplied
Alternating voltage
Aterminaltowhichor fromwhichanalternating(sine-wave)current
or voltage may be applied or supplied
Grounded terminal
A grounded terminal, which as far as the operator is concerned, is
already grounded by means of an earth grounding system.
Protective grounded (earth) terminal
A terminal which must be connected to earth ground prior to
making any other connection to the equipment.
Equipotential connection (earth bonding)
A connection made to the plantgrounding system which may be of
type e.g. neutral star or equipotential line according to national or
company practice
EX
EX
Explosion protection
Safety conventions
Electrical Symbols
1 Safety instructions

Prothermo NMT 538
6Endress+Hauser Systems & Gauging
2 Identification
2.1 Device designation
2.1.1 Nameplate
The follow technical data are given on the instrument nameplate:
8
Supply Circuit:
Ui < 30V Ii < 120 mA Pi < 1W
Ci = 5.3 nF Li = 0.2 mH
Temperature measurement circuit:
Uo = 11.3V Io = 81.6 mA Po = 406 mW
Ri = 404Ω Co = 0.22 µFLo = 4.0 mH
Sakura Endress Co.,Ltd.
Tokyo Japan
NP-2455
Type of Ex & IS
certification attached
AmbientTemperature: -20 ~ +60 C
!
i
2 Identification

Prothermo NMT 538
Endress+Hauser Systems & Gauging 7
2.1.2 Ordering structure
10 Protection class
0 Protection: Weather proof IP 54
2 EEx ia IIB T4, CENELEC...obsolete, Nov. 2002
3 EEx ia IIB T4, ATEX
7 IS Class 1, Div 1, Gp, CD, FM
8 Class 1, Div 1, Gp, CD, CSA(Exi).....pending
9 Special version
20 Cable Entry
A One G(PF) 1/2" thread
B One NPT 1/2" thread
C One PG 16 Thread
D One M 20 thread
Y Special version
30 Process connection, material
1 3/4" NPS, Galvanized. mild steel
2 M20, Varec 1700 probe connection only, mild steel
9 Special version
40 Measuring range
1 Range: -50.....+200 °C (-58°F.....+392°F) liquid/gas temp. only
2 Range: -50.....+200 °C (-58°F.....+392°F) liquid/gas temp. and WB
9 Special version
50 Compatible Element Type
0 Cu90, multi resistance element
1 CuPt100, multi resistance element
2 Cu90, multi spot element
3 Pt100, multi spot element
4 Cu100, multi resistance element
5 Cu100, multi spot element
9 Special version
NMT538- Complete product designation
2 Identification

Prothermo NMT 538
8Endress+Hauser Systems & Gauging
2.1.3 Specifications
Accuracy of conversion ±0.15 °C
Number of connectable elements 2...16
Conversion temp. range -50...+200 °C
Data communication Multidrop HART Protocol
Pollingaddress: 02 for connecting to Proservo NMS 53x
or Tank Side Monitor NRF590 (factory default value)
Input Level data, operation, & configuration command from
the NMS 53x Proservo or Tank Side Monitor NRF 590
Output Liquid level regarded various temp. data & element
information
Materials Housing: Aluminium diecast
Process connection: Galvanized carbon steel
Power supply DC24V ±10% from Proservo NMS 53x IS HART line
DC17 ± 1V from NRF 590 IS HART line
Power supply range: Requires DC16-30V for normal
operation condition
Current consumption 9mA ±0.5mA for signal pulse reception
Cable entry G (PF) ½x 1
NPT ½x 1
PG 16 x 1
M20 x 1
Ambient temp. -20...+60 °C (W. heating jacket option: -40...+60)
Certification Weather proof IP54
EEx ia IIB T4, CENELEC... obsolete
EEx ia IIB T4, ATEX
IS class 1, Div 1, Gp.CD, FM
Class 1, Div 1, Gp.CD, CSA...pending
2 Identification

Prothermo NMT 538
Endress+Hauser Systems & Gauging 9
3 Installation
3.1 Incoming acceptance, transport, storage
3.1.1 Incoming acceptance
Check the packing and contents for any signs of damage.
Check the shipment, make sure nothing is missing and that the scope of supply matches your
order.
3.1.2 Transport
Caution!
Followthe safety instructionsand transport conditions for instrumentsof more than4kg. Do notlift
the measuring instrument by its housing in order to transport it.
3.1.3 Storage
Packthemeasuringinstrumentso thatisprotectedagainstimpactsforstorageandtransport.The
original packing material provides the optimum protection for this.
The permissible storage temperature is -20°C...+60°C (-4°F...+140°F)
3 Installation

Prothermo NMT 538
10 Endress+Hauser Systems & Gauging
3.2 Installation conditions
3.2.1 Dimensions
Figure1: Dimension & appearance of temperature version housing
Figure2: Dimension & appearance of temperature and WB version housing
Approx. 250 mm
225 mm
52 mm
Approx. 317 mm
198 mm
49 mm
3 Installation

Prothermo NMT 538
Endress+Hauser Systems & Gauging 11
Figure3: Dimension & appearance of UK Special version (connection to 1700 series average
RTD probe only)
Note!
UK Special is only designed to connect with Whessoe Varec 1700 series average temperature
probe. WB data accessibility is no longer available at the NMT 538 prothermo.
Mounting of UK Special version M20 connection to Varec 1700 terminal box
Use seal tape on the threaded gauge to terminal box connection. Slip in a bunch of cable (RTD
signal inlet cable) into the terminal box female thread connection. Turn the entire NMT 538 gauge
head clockwise and screw in the connection at least 10 complete turns, then secure with lock nut
against terminal box.
3.3 Mounting
3.3.1 Mechanical connection
Note!
Prior to the removal of existing RTD temp. converter, note following information, also these
information are applicable for new installations as well.
1. Element type (material & structure)
2. Total element number
3. Presence of bottom & vapor spot elements
4. Lowest element position
5. Elements intervals
6. Cable color for each element
Prior to perform NMT538 installation, temporarily tie up all RTD cables (and coaxial cable if the
probe is equipped with Water Bottom sensor) with zip tight or short string to avoid damaging
cables during mechanical connection.
168mm 32mm
Terminal Box of
1700 series RTD probe
Lock nut
3 Installation

Prothermo NMT 538
12 Endress+Hauser Systems & Gauging
Figure4: Preparation to the mechanical connection
Caution!
Precaution before NMT538 mechanical installation is performed to the existing RTD probe.
Unscrew lower NPS threaded female connector once and try to fit on the temp. RTD probe to
ensure the each threaded connection can be smoothly attached.
Temporar y tie all cables
to avoid damaging with the
mechanical connection
Leave as much cable
length as possible
(Min. 250mm, or 10")
Trim cable ends
to the same length
for the NMT538
connection
3 Installation

Prothermo NMT 538
Endress+Hauser Systems & Gauging 13
Figure5: Threaded type connection
1. Install lower NPS threaded female connector along with free spinning coupling onto RTD
probe threaded connection until it is completely seated. Use a seal tape and rap it around on
the RTD probe’s threaded connection.
2. Install NMT538 housing along with included gasket in-between. Use a seal tape and rap it
around on the NMT538 housing side male threaded connector, then hand tight the free spin-
ning coupling until it stops.
3. Remove the cap cover and make sure the both side of cables have enough length to be con-
nected freely.
warning!
Do not pull either side cables or apply over-tension during this procedure. Internally torn cables
or loose connection can cause invalid temperature measurement.
4. After performing cable connection & positioning the face angle of NMT538, Tighten approxi-
mately 1/8th turn the free spinning coupling with a wrench from where it was hand tighten.
3.3.2 Wiring: NMT538 to RTD probe
Temperature signal cables
RTD cables will be directly connected to NMT538 input cables with simple cramp connectors
(included). Strip each end of cable approximately 1cm (3/8") and slip into the connector, then
pinch with pliers to secure the connection.
NMT538
Seal tape
(not included)
Seal tape
(not included)
T ape winding
rotation
Tape winding
rotation
Gasket
(included)
Free spin
coupling
NPS 3/4
threaded connection
(RTD probe side)
to Average temp. element
RTD signal &
(WB capacitance coaxial)
cable from
Lower NPS threaded
female connector
probe
3 Installation

Prothermo NMT 538
14 Endress+Hauser Systems & Gauging
Figure 6: Connector details
Cabling color code is listed below.
NMT 538 cable color: the principle Based on the same as A,B,b 3 wire spot RTD cabling method.
A: Signal wires
No.1: brown (lowest position)
No.2: red
No 3: orange
No. 4: yellow
No. 5: green
No. 6: blue
No. 7: violet
No. 8: gray
No. 9: white
No. 10: pink
No. 11: brown / black
No. 12: red / black
No. 13: orange / black
No. 14: yellow / black
No. 15: green / black
No. 16: blue / black
B: Common wires
B0: gray / black
B1: violet / black
b: white / black
cable from
NMT538
cable from
RTD probe
1. Select a pair cables
A cable from
NMT538
A cable from
RTD probe
2. Strip cable ends
approximately 10mm, or 1/2"
A cable from
NMT538
A cable from
RTD probe
3. Twist both ends together
and install terminal connector
A cable from
NMT538
A cable from
RTD probe
4. Cramp the connected terminal
with pliers or any connector tool
3 Installation

Prothermo NMT 538
Endress+Hauser Systems & Gauging 15
Diagram 1: NMT538 with Whessoe 1700 & Varec 9909
Standard NMT538 to average probe connection
Caution!
Some RTD probes are equipped with additional bottom and vapor spot bulb besides average
temp element. Unless a probe has these spot elements, connect brown to brown cables, red to
red cables according to diagram 2. Do not skip using brown (No. 1 element) on the NMT538 side
input cables. Not connected to #1 brown wire on NMT538 input will cause open circuit error
(displaying 359°C) constantly.
No.16
No.15
No.14
No.13
No.12
No.11
No.10
No.9
No.8
No.7
No.6
No.5
No.4
No.3
No.2
No.1
B Ø, B
b
yellow & black
green & black
blue & black
orange & black
red & black
brown & black
No.10 (pink) black
No. 9 (white) white
No. 8 (gray) gray
No. 7 (violet) violet
No. 6 (blue) blue
No. 5 (green) green
No. 4 (yellow) yellow
No. 3 (orange) orange
No. 2 (red) red
No. 1 (brown) brown
white & black
gray & black
black
black
Cables from
Whessoe 1700
Varec 9909
Temperature Probe
from the tank
cables from
NMT538 module
cramp
connection
to NMT538
electronics
Connection in the NMT538Terminal Housing
violet & black
3 Installation

Prothermo NMT 538
16 Endress+Hauser Systems & Gauging
Diagram 2:NMT538 with Weed Beacon MWR type with Water Bottom sensor
caution!
RTD probe side cablescolor may differ from diagram above. Note the connection and cable color
combination during disassembling previous RTD temperature converter. This will prevent faulty
element to converter connection.
Uneven cable length can influence the precise temperature calculation to be inaccurate result.
Trim cable end to the even length as much as possible in case of uneven cabling condition
presents at the RTD probe side cables.
Coaxial cable for capacitance signal to auxiliary converter
NMT538 temp. + WB version allows accessibility of coaxial cable (Water Bottom capacitance
signal) from the auxiliary capacitance to HART converter (DREXELBROOK and others). The
sensor cable from WB probe and converter cable through cable outlet can meet within NMT538
terminalhousingorsensorcablecandirectlyexitfromcableoutlet.SomeWBcapacitancesensor
might have additional ground wire. Pleaseroute this wire to the existing CVconverter accordingly
without interruption inside of the NMT 538 housing.
WB out
WB out
WB in
WB in
No .16
No .15
No .14
No .13
No .12
No .11
No .10
No . 9
No . 8
No . 7
No . 6
No . 5
No . 4
No . 3
No . 2
No . 1
BØ,B
b
No.14 (white & yellow) yellow & black
green & black
blue & black
No.13 (white & orange) orange & black
No.12 (white & red) red & black
No.11 (white & brown) brown & black
No.10 (pink) black
No. 9 (white) white
No. 8 (gray) gray
No. 7 (violet) violet
No. 6 (blue) blue
No. 5 (green) green
No. 4 (yellow) yellow
No. 3 (orange) orange
No. 2 (red) red
No. 1 (brown) brown
white & black
violet & black
black
black
CAPACITANCE (+)
to auxiliary
capacitance converter
CAPACITANCE (-) +
_
cables from
Weed Beacon
MW or MWR type
temp. &WB probe
from the tank
to NMT538
electronics
cables from
NMT538 module
cramp
connection
connection in the
NMT538 terminal housing
(temp. &WB version)
gray & black
3 Installation

Prothermo NMT 538
Endress+Hauser Systems & Gauging 17
Diagram 3: NMT538 with Varec 9909 with bottom & vapor spot temperature
Note!
Since NMT538 is capable of accepting up to 16 elements for average temperature calculation,
the bottom & vapor spot elements can be used to expand its measuring range. In this case, the
bottom spot can be used as the #1 lowest position element for the connection to the brown wire
from the NMT538. If the average elements have already 16 input, ignore connecting neither the
bottom nor vapor spot element.
No.16
No.15
No.14
No.13
No.12
No.11
No.10
No.9
No.8
No.7
No.6
No.5
No.4
No.3
No.2
No.1
BØ, B
b
yellow & black
green & black
blue & black
orange & black
red & black
brown & black
No.10 (pink)
black
No. 9 (white)
white
No. 8 (gray) gray
No. 7 (violet) violet
No. 6 (blue)
blue
No. 5 (green) green
No. 4 (yellow) yellow
No. 3 (orange) orangeNo. 2 (red) red
No. 1 (brown)
Bottom Spot
Vapor Space Spot
brown
white & black
gray & black
black
black
cables from
Varec 9909
Temperature Probe
from the tank
cables from
NMT538 module
cramp
connection
to NMT538
electronics
Connection in the NMT538Terminal Housing
violet & black
3 Installation

Prothermo NMT 538
18 Endress+Hauser Systems & Gauging
3.4 HART line cabling
NMT538 is a HART slave instrument. that requires power supply for the device operation and
communication signal on the same 2 cables.
Figure 7:NMT 538 terminal board
Required DC voltage for NMT538 operation is minimum 16 to maximum 30 volt.
With the connection to the Proservo NMS53x, normally supply DC24V ±10% to the NMT538. The
Tank side monitor NRF590 can normally supply DC16±1V on the IS HART loop.
Both the NMT538 and host instrument recognizes 0.5mA current shift as the trigger of data
transmission. I.e, NMT538 normally consumes 9.0mA at temperature measurement only. The
current consumption decreases to approximately 8.5mA while NMT538 is receiving command
from the host gauge on the HART line. On the other hand, the current consumption increases to
approximately 9.5mA while NMT538 is sending data to the host gauge as a response to the
previous command.
Warning!
Before opening the cover of the Prothermo NMT538 for maintenance, switch off the power supply
of the Proservo NMS53x or the Tank side monitor NRF590. Either of these 2 instruments normally
are the host gauge to supply DC voltage on the IS HART line to the NMT538.
3.4.1 Protection from line noise
The following precautions are required to rule out any malfunction by line noise.
-The minimum conductor size for the HART transmission distance up to 1500m should be used
0.51mmdiameter(#24AWG)shieldtwistedpaircableand0.81mmdiameter(#20AWG)forlonger
distance.
-Use appropriate cable size reference to the conditions described below chart 1.
Grounding for cable screen
Screened twisted pair
or steel armored wire
Temp.HART
from NMT 538
+ terminal 1
- terminal 2
to NRF 590
+ terminal 24 or 26
- terminal 25 or 27
to NMS53...
+ terminal 24
- terminal 25
Cable gland
(Refer to specifications)
Temp. RTD signal (max. 16 points)
- Whessoe Varec 1700
- Whessoe Varec 9909
- Weed Beacon MW & MWR
FG
1 2
Screen
3 Installation

Prothermo NMT 538
Endress+Hauser Systems & Gauging 19
Chart 1: Typical cable capacitance & distance for 1.02mm (#18 AWG) shield twisted pair
-If you use an unscreened wire, then equip it with a conduit pipe.
-Connect the cable screen to the frame ground.
3.4.2 Connection to the Proservo NMS53x
Figure 8: Terminal connection on the Proservo NMS
Tank sensors
The Proservo NMS53x can interface up to 4 HART sensors. All HART sensors are connected to
one HART multi-drop communication loop internally. In order to separate IS and non-IS HART
sensory connection, 2 pairs of HART terminals are equipped on the Proservo NMS53x. The
NMT538 can be connectedonly on terminals 24(+) & 25(-) where theIS HART module is installed.
Cable Capacitance - pf / m (pf / ft)
65 pf / m 95 pf / m 160 pf / m 225 pf / m
(20 pf / ft) (30 pf / ft) (50 / pf / ft) (70 pf / ft)
NO. Network Devices Cable length - meters (feet)
2763 m 2000 m 1292 m 985 m
(9000 ft) (6500 ft) (4200 ft) (3200 ft)
52462 m 1815 m 1138 m 892 m
(8000 ft) (5900 ft) (3700 ft) (2900 ft)
1
10 2154 m 1600 m 1015 m 769 m
(7000 ft) (5200 ft) (3300 ft) (2500 ft)
1846 m 1415 m 892 m 708 m
(6000 ft) (4600 ft) (2900 ft) (2300 ft)
15
4 ... 20 mA
4 ... 20 mA
Channel 1
Channel 2
Port_A+
Port_A-
IS HART

or
+
+
_
_
A
B
b
22
23
24
25
26
+
_
COM
HOIST
STOP
Operation
contact
input
20
21
16
19
18
17
Alarm contact
Alarm contact
Alarm contact
+
_
+
_
+
_
10
15
14
13
12
11
Alarm contact
+
_
Port_B-
Port_B+
Non IS HART
to NRF or others

+
_
9
8
7
6
5
4
Power supply
AC 85 ... 264V 50/60Hz
or
DC 20 ... 62V AC20 ... 55V
2
3
1
G
N
L
L
G
N
ARS
ARS
ARS +
_
Digital output
Rack bus RS485,
Serial pulse,
or
HART
123
ARS ARS ARS
LNGND
LGN
46
810 12
57911 13
NRF
+
NRF-
RC
A/+
RC
B/-
AL1
AL1 AL2
AL2 AL3
AL3
14 16 18 22
15 17 19 21 23
AL4
AL4
COM
CTR1
CTR2
N.C. OT1-
OT1+
OT2-
OT2+
20
24 26
25
P_A+
AP_A-
Bb
From NMT 538
3 Installation

Prothermo NMT 538
20 Endress+Hauser Systems & Gauging
Caution!
NMT538 HART connection can be only allowed when the Proservo NMS53x is equipped with the
intrinsically safe HART input module. The connection is not allowed when the built in spot
temperature input is selected on the Proservo NMS.
3.4.3 Connection to the Tank side monitor NRF590
Figure 9: Terminal connection on the tank side monitor NRF590
Tank sensors
The Tank side monitor NRF590 can interface up to 6 IS HART sensors. All HART sensors are
connected to one HART multi-drop communication loop. To keep the wiring simple, 3
interconnected terminal pairs are available; however, 2 pairs of terminals, 24(+) 25(-) & 26(+) 27(-
), are available for the NMT538 connection since terminals 28(+) 29(-) are reserved for the Micro
pilot S FMR 53x HART connection.
16 D+ + RTD drive
17 S+ + RTD sense
18 S- - RTD sense
19 D- - RTD drive
20 OPT1 i.s. OV
21 OPT2 4...20 mA input
22 OPT3 i.s. OV
23 OPT4 i.s. +24V
24 H+ + Hart comm.
25 H- - Hart comm.
26 H+ + Hart comm.
27 H- - Hart comm.
28 H + Hart comm.
29 H - Hart comm.
31 P-
+ i.s.power for FMR
S-series (terminal 1)
30 P+
- i.s.power for FMR
S-series (terminal 1)
4 Operation Principle