Endress+Hauser Waterpilot FMX21 User manual

BA380P/00/EN/03.09
71080065
Valid from software version:
01.00.zz
Operating Instructions
Waterpilot FMX21
Hydrostatic level measurement

Brief overview Waterpilot FMX21
2Endress+Hauser
Brief overview
For quick and easy commissioning:
Safety instructions →ä4
Explanation of the warning symbols
Special instructions can be found at the corresponding point in the section in
question. The priority is indicated by the Warning #, Caution "and
Note symbols !
Æ
Installation →ä9
The steps for installing the device, and the associated installation conditions
can be found here.
Æ
Wiring →ä15
The device is largely supplied as a ready-wired unit.
Æ
Operation →ä24
This section provides an overview of how to operate the device.
Æ
Commissioning using the Endress+Hauser operating program →ä27
The "Commissioning" section tells you how to use the device in operation and
check its functions.
Further information on operating the device using the Endress+Hauser
FieldCare operating program is provided in Operating Instructions
BA027S/04.
Æ
Operating menu →ä52
Section 11.1 describes all the parameters in the order of how they appear in
the menu. The page number takes you to the parameter description in
question.
Æ
Troubleshooting →ä47
If faults occur during operation, use the checklist to find the reason.
This section lists measures you can take yourself to rectify any faults that may
occur.
Æ
Index of parameter names / keyword index →ä77
The index lists all the parameters in alphabetical order.
The page reference/link takes you to the parameter in question.
Important terms and key words for the individual sections can be found here.
Use the keyword index to find information quickly and easily.

Waterpilot FMX21 Table of contents
Endress+Hauser 3
Table of contents
1 Safety instructions . . . . . . . . . . . . . . . . 4
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
1.2 Installation, commissioning and operation . . . . . . . . 4
1.3 Operational safety and process safety . . . . . . . . . . . . 4
1.4 Notes on safety conventions and icons . . . . . . . . . . . 5
2 Identification . . . . . . . . . . . . . . . . . . . . 6
2.1 Device designation . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.2 Scope of delivery . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.3 CE mark, Declaration of Conformity . . . . . . . . . . . . 8
2.4 Registered Trademarks . . . . . . . . . . . . . . . . . . . . . . 8
3 Installation . . . . . . . . . . . . . . . . . . . . . . 9
3.1 Incoming acceptance and storage . . . . . . . . . . . . . . . 9
3.2 Installation conditions . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Installation instructions . . . . . . . . . . . . . . . . . . . . . 11
3.4 Post-installation check . . . . . . . . . . . . . . . . . . . . . . 14
4 Wiring . . . . . . . . . . . . . . . . . . . . . . . . 15
4.1 Connecting the device . . . . . . . . . . . . . . . . . . . . . . 15
4.2 Connecting the measuring unit . . . . . . . . . . . . . . . 19
4.3 Post-connection check . . . . . . . . . . . . . . . . . . . . . . 23
5 Operation . . . . . . . . . . . . . . . . . . . . . . 24
5.1 Operation using the HART handheld terminal . . . . 24
5.2 Operation via FieldCare . . . . . . . . . . . . . . . . . . . . . 25
5.3 Locking/unlocking operation . . . . . . . . . . . . . . . . . 25
5.4 Resetting to factory settings (reset) . . . . . . . . . . . . 26
6 Commissioning. . . . . . . . . . . . . . . . . . 27
6.1 Function check . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
6.2 Commissioning with FieldCare . . . . . . . . . . . . . . . 27
6.3 Pressure measurement . . . . . . . . . . . . . . . . . . . . . . 29
6.4 Level measurement . . . . . . . . . . . . . . . . . . . . . . . . 31
6.5 Linearization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
7 Maintenance. . . . . . . . . . . . . . . . . . . . 43
7.1 Exterior cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . 43
8 Accessories. . . . . . . . . . . . . . . . . . . . . 44
8.1 Mounting clamp . . . . . . . . . . . . . . . . . . . . . . . . . . 44
8.2 Terminal box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
8.3 Additional weight for Waterpilot with outer
diameter of 22 mm and 29 mm . . . . . . . . . . . . . . 44
8.4 TMT182 temperature head transmitter
(4 to 20 mA/HART) . . . . . . . . . . . . . . . . . . . . . . . 45
8.5 Extension cable mounting screw . . . . . . . . . . . . . . 45
8.6 Terminals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8.7 Cable shortening kit . . . . . . . . . . . . . . . . . . . . . . . 45
8.8 Cable marking . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
8.9 Testing adapter for FMX21 with outer diameter of
22 mm and outer diameter of 29 mm . . . . . . . . . . 46
9 Troubleshooting . . . . . . . . . . . . . . . . . 47
9.1 Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
9.2 Malfunctions of Waterpilot FMX21 with optional
Pt100 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.3 Malfunctions of temperature head transmitter
TMT182 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
9.4 Return . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.5 Disposal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
9.6 Software history . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
10 Technical data . . . . . . . . . . . . . . . . . . . 51
11 Appendix. . . . . . . . . . . . . . . . . . . . . . . 52
11.1 Overview of the operating menu . . . . . . . . . . . . . . 52
11.2 Description of parameters . . . . . . . . . . . . . . . . . . . 60
11.3 Patents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Safety instructions Waterpilot FMX21
4Endress+Hauser
1 Safety instructions
1.1 Designated use
The Waterpilot FMX21 is a hydrostatic pressure sensor for measuring the level of fresh water,
wastewater and salt water. The temperature is measured simultaneously in the case of sensor
versions with a Pt100 resistance thermometer. An optional temperature head transmitter converts
the Pt100 signal to a 4 to 20 mA signal with superimposed digital communication protocol
HART 6.0.
The manufacturer accepts no liability for damages resulting from incorrect use or use other than that
designated.
1.2 Installation, commissioning and operation
The Waterpilot FMX21 and the (optional) TMT182 temperature head transmitter are designed to
meet state-of-the-art safety requirements and comply with applicable regulations and EC Directives.
If used incorrectly or for applications for which they are not intended, the devices can be a source
of application-related danger, e.g. product overflow due to incorrect installation or configuration.
For this reason, installation, connection to the electricity supply, commissioning, operation and
maintenance of the measuring system must only be carried out by trained, qualified specialists
authorized to perform such work by the facility's owner-operator. The specialist staff must have read
and understood these Operating Instructions and must follow the instructions they contain.
Modifications and repairs to the devices are permissible only if they are expressly allowed in the
Operating Instructions. Pay particular attention to the data and information on the nameplate.
1.3 Operational safety and process safety
Alternative monitoring measures have to be taken while configuring, testing or servicing the device
to ensure the operational and process safety.
1.3.1 Hazardous area (optional)
Devices for use in hazardous areas bear an additional marking on the nameplate (→ä6,
"Nameplate for Waterpilot FMX21"). If using the measuring system in hazardous areas, the
appropriate national standards and regulations must be observed. The device is accompanied by
separate Ex documentation, which is an integral part of this documentation. The installation
regulations, connection values and safety instructions listed in this document must be observed. The
documentation number of the related Safety Instructions (XA) is also indicated on the nameplate.
• Ensure that all personnel are suitably qualified.
• Measuring point requirements with regard to measurement and safety must be observed.
• Please refer to the "Ordering information" section of Technical Information TI431P/00/EN for
versions for approvals in the order code.

Waterpilot FMX21 Safety instructions
Endress+Hauser 5
1.4 Notes on safety conventions and icons
In order to highlight safety-related or alternative operating procedures in the manual, the following
conventions have been used, each indicated by a corresponding symbol in the margin.
Symbol Meaning
#Warning!
A warning highlights actions or procedures which, if not performed correctly, will lead to serious
personal injury, a safety hazard or the destruction of the device.
"Caution!
Caution highlights actions or procedures which, if not performed correctly, may lead to personal
injury or the incorrect operation of the device.
!Note!
A note highlights actions or procedures which, if not performed correctly, can have an indirect
effect on operation or trigger an unexpected response on the part of the device.
0Explosion-protected, type-examined equipment
If the device has this symbol embossed on its nameplate, it can be used in a hazardous area or a
non-hazardous area, depending on the approval.
-Hazardous area
This symbol is used in the drawings of these Operating Instructions to indicate hazardous areas.
– Devices used in hazardous areas must possess an appropriate type of protection.
.
Safe area (non-hazardous area)
This symbol is used in the drawings of these Operating Instructions to indicate non-hazardous
areas.
– Devices used in hazardous areas must possess an appropriate type of protection. Cables used in
hazardous areas must meet the necessary safety-related characteristic quantities.
%Direct current
A terminal to which DC voltage is applied or through which direct current flows.
&Alternating current
A terminal to which alternating voltage (sine-wave) is applied or through which alternating current
flows.
)Ground connection
A grounded terminal, which, as far as the operator is concerned, is already grounded by means of a
grounding system.
*Protective earth connection
A terminal which must be connected to ground prior to establishing any other connections.
+Equipotential connection
A connection that has to be connected to the plant grounding system: This may be a potential
equalization line or a star grounding system depending on national or company codes of practice.
Connecting cable immunity to temperature change
Indicates that the connecting cables must be able to withstand temperatures of at least 85 °C.
Safety instructions
Observe the safety instructions in the related Operating Instructions.
>
=
t 85°C

Identification Waterpilot FMX21
6Endress+Hauser
2 Identification
2.1 Device designation
2.1.1 Identifying the measuring device via the nameplate
Nameplate for Waterpilot FMX21
The nameplate is secured to the extension cable of the FMX21, see also →ä10, Section 3.2.1.
P01-FMX21xx-18-xx-xx-xx-003
Fig. 1: Nameplate for Waterpilot FMX21
1 Order code
See the specifications on the order confirmation for the meanings of the individual letters and digits.
2 Serial number
3IDcode
4 Nominal measuring range
5 Set measuring range
6Outputsignal
7 Supply voltage
8 Wetted materials
9 TAG (tag name)
10 Length of the extension cable
11 Approval symbol (optional), (CSA, FM, ATEX)
12 Text for approval (optional)
13 Certificate number
14 Drawing number
15 Current drawing number index
16 Test date (optional)
17 Observe TI information sign
18 Symbol: Observe Safety Instructions, with information on the documentation number, e.g. XA454P (optional)
19 FMX21 connection diagram
20 Pt100 connection diagram (optional)
21 Warning (hazardous area), (optional)
2 3
45
67
48
9
10
11
12 13
17
15
16 18
19
20 21
14
Waterpilot FMX21
Made in Germany, D-79689 Maulburg
Ident-Code.:
TAG:
Ser.-No.:
Order Code:
L=
Mat:
250002736--
Dat./Insp.:
Cal./Adj.
p

Waterpilot FMX21 Identification
Endress+Hauser 7
In addition, the FMX21 with an outer diameter of 22 mm and 42 mm also bears the following
information:
P01-FMX21xx-18-xx-xx-xx-004
Fig. 2: FMX21 labeling
1 Serial number
2 Nominal measuring range
3 Set measuring range
4 CE mark or approval symbol
5 Certificate number (optional)
6 Text for approval (optional)
Nameplate for additional approvals
P01-FMX21xx-18-xx-xx-xx-005
Fig. 3: approval nameplate
1-3 Approval symbol (marine approval)
4-6 Approval symbol (drinking water approval)
7 Reference to document
8-10 Text for approval
11 Wetted materials
2.1.2 Identifying the measuring device via the order code
Specific device features make up the order code. You can assign these features in the "Ordering
information" section of Technical Information TI431P/00/EN.
2.2 Scope of delivery
The scope of delivery comprises:
• Waterpilot FMX21, optionally with integrated Pt100 resistance thermometer
• Optional accessories (→ä44, Section 8)
Documentation supplied:
• Operating Instructions BA380P/00/EN (this document)
• Final inspection report
• Drinking water approval (optional)
• Devices suitable for use in hazardous areas:
Additional documentation such as Safety Instructions (XA), Control Drawings (ZD).
CSA 01 1177992 X
INT.SAFE,CL.I,DIV.1, GP. ABCD
CL.1, ZONE0, Ex ia IICT6-T4
-10°CTa70°C££
x
Install per dwg.96000xxxx-
Ser.-No.:
p
Waterpilot FMX21
1234567891A
0...600mbar
0...400mbar
Cal./Adj.
5
6
4
1
2
3
Mat.: 316L/1.4435/1.4404, Al O , PE,EPDM
23
refer to document:
SDxxxP/00/A3/
KTW-
Empfehlung
Waterpilot FMX21
Made in Germany, D-79689 Maulburg
For use in drinking water according to:
ACS
NSF 61
2
3
4
5
6
7
9
10
11
8

Identification Waterpilot FMX21
8Endress+Hauser
2.3 CE mark, Declaration of Conformity
The devices are designed to meet state-of-the-art safety requirements, have been tested and left the
factory in a condition in which they are safe to operate. The devices comply with the applicable
standards and regulations as listed in the EC Declaration of Conformity and thus comply with the
legal requirements of the EC Directives. Endress+Hauser confirms the conformity of the device by
affixing to it the CE mark.
2.4 Registered Trademarks
GORE-TEX®
Trademark of W.L. Gore & Associates, Inc., USA.
TEFLON®
Trademark of E.I. Du Pont de Nemours & Co., Wilmington, USA.
HART®
Trademark of the HART Communication Foundation, Austin, USA.
FieldCare®
Trademark of Endress+Hauser Process Solutions AG.
iTEMP®
Trademark of Endress+Hauser Wetzer GmbH + Co. KG, Nesselwang, D.

Waterpilot FMX21 Installation
Endress+Hauser 9
3 Installation
3.1 Incoming acceptance and storage
3.1.1 Incoming acceptance
• Check the packaging and the contents for damage.
• Check the shipment, make sure nothing is missing and that the scope of supply matches your
order.
3.1.2 Storage
The device must be stored in a dry, clean area and protected against damage from impact
(EN 837-2).
Storage temperature range:
• FMX21: –40 to +80 °C
• TMT182: –40 to +100 °C
• Terminal box: –40 to +80 °C

Installation Waterpilot FMX21
10 Endress+Hauser
3.2 Installation conditions
P01-FMX21xx-11-xx-xx-xx-003
Fig. 4: Examples of installation
For accessories →Chap. 8.
1 Extension cable mounting screw can be ordered as an accessory
2 Terminal box can be ordered as an accessory
3 Extension cable bending radius > 120 mm
4 Mounting clamp can be ordered as an accessory
5 Extension cable
6 Guide tube for FMX21
7 Additional weight can be ordered as an accessory
8 Protection cap
!Note!
• Cable length
– Customer-specific length in meters or feet.
– Limited cable length when performing installation with freely suspended device with extension
cable mounting screw or mounting clamp, as well as for FM/CSA approval: max. 300 m/
984 ft.
• Sideways movement of the level probe can result in measuring errors. For this reason, install the
probe at a point free from flow and turbulence, or use a guide tube. The internal diameter of the
guide tube should be at least 1 mm bigger than the outer diameter of the selected FMX21.
• The cable must end in a dry room or a suitable terminal box. The terminal box from
Endress+Hauser provides optimum humidity and climatic protection and is suitable for outdoor
installation.
➀
➂
➁
➃
➄
➅
➆
➇
FMX21
OPEN
CLOSE
90°
90°
Warning:
Avoid electrostatic charge in explosive atmosphere.
See instructions
Ser.-No.: Ident-Code.:
OrderCode:
L=
Mat:
Dat./Insp.:
red +
black -
yellow-green
4…20mA
Sensor
Waterpilot FMX21
Madein Germany, D-79689 Maulburg
p
Cal./Adj.
0...400mbar
Exia IIC T6-T4
£
-10°CTa70°C
£Ta 40°C for T6
£
Ta 70°C for T4
£
Ui 30VDC; Ii 133mA; Pi1W
£££
II2G
Ci=5nF + 180pF/m ; Li= 1 µH/m
Warning!
Avoid electrostatic
charge
XXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXX
4...20 mA
XAxxxP-X
10,5...35VDC
TÜV01 ATEX 1685
0...600mbar
1234567808E
PPS/Polyolefin AL2O3 FEP EPDM
TAG:
XXXXXXXXXXXXXXXXXX
FMX21-XXXXXXXXXXX+XXXXXXXXXXXXXXXXXXXXX
XX/XXXX
250002736--
XXXXXXXXXXXXXXXXX

Waterpilot FMX21 Installation
Endress+Hauser 11
• Protection cap: The device is provided with a protection cap to prevent mechanical damage to the
measuring cell. This cap should not be removed during the transportation and installation process.
• If the cable is shortened, the filter at the pressure compensation tube has to be reattached
(see also →ä45, Section 8 "Cable shortening kit").
• Endress+Hauser recommends using twisted, shielded cables.
3.2.1 Dimensions
For dimensions, please refer to Technical Information TI431P/00/EN, "Mechanical construction"
section (→ see also: www.de.endress.com → Download).
3.3 Installation instructions
3.3.1 Mounting the Waterpilot with a mounting clamp
P01-FMX21xxx-17-xx-xx-xx-004
Fig. 5: Mounting with a mounting clamp
1 Extension cable
2 Mounting clamp
3 Clamping jaws
Mounting the mounting clamp:
1. Mount the mounting clamp (item 2). When selecting the place to fix the unit, take the weight
of the extension cable (item 1) and the device into account.
2. Raise the clamping jaws (item 3). Position the extension cable (item 1) between the clamping
jaw as illustrated in Figure 6.
3. Hold the extension cable in position (item 1) and push the clamping jaws (item 3) back down.
Tap the clamping jaws gently from above to fix it in place.
➀
➂
➁

Installation Waterpilot FMX21
12 Endress+Hauser
3.3.2 Mounting the Waterpilot with an extension cable mounting
screw
P01-FMX21xxx-17-xx-xx-xx-005
Fig. 6: Mounting with extension cable mounting screw, here illustrated with thread G 1 1/2
1 Extension cable
2 Cover mounting screw
3 Sealing ring
4 Clamping sleeves
5 Mounting screw adapter
6 Top edge of clamping sleeve
7 Required length of extension cable and Waterpilot probe before assembly
8 After assembly, item 7 is located next to the mounting screw with
G 1 1/2 thread: height of sealing surface of the adapter or 1 1/2 NPT thread height of thread run-out of adapter
!Note!
If you want to lower the level probe to a certain depth, place the top edge of the clamping sleeve
4 cm higher than the required depth. Then push the extension cable and the clamping sleeve into
the adapter as described in Step 6 in the following section.
Mounting extension cable mounting screw with G 1 1/2 or NPT thread:
1. Mark the desired length of the extension cable on the extension cable, see also note on this
page.
2. Insert the probe through the measuring aperture and carefully lower on the extension cable.
Fix the extension cable to prevent it from slipping.
3. Push the adapter (item 5) over the extension cable and screw it tightly into the measuring
aperture.
4. Push the sealing ring (item 3) and cover (item 2) onto the cable from above. Press the sealing
ring into the cover.
5. Place the clamping sleeve (item 4) around the extension cable (item 1) in accordance with
Figure 6.
6. Push the extension cable with the clamping sleeve (item 4) into the adapter (item 5).
7. Push the cover (item 2) and sealing ring (item 3) onto the adapter (item 5) and screw tightly
to the adapter.
!Note!
Reverse the sequence of steps to remove the extension cable mounting screw.
"Caution!
Mounting in unpressurized containers only.
ò
➀
➂
➁
➃
➄
➅
➆
SW 36
41 AF
SW 41
36 AF
+ 40
8
( + 1.57)
mm (inch)

Waterpilot FMX21 Installation
Endress+Hauser 13
3.3.3 Mounting the terminal box
The optional terminal box is mounted with four screws (M 4). For the dimensions of the terminal
box, please refer to Technical Information TI431P/00/EN, "Mechanical construction" section
(→ see also: www.de.endress.com → Download).
3.3.4 Mounting the TMT182 temperature head transmitter
P01-FMX21xx-17-xx-xx-xx-003
Fig. 7: Temperature head transmitter mounting, here illustrated with terminal box.
Only open the terminal box with a screwdriver.
1 Mounting screws
2 Mounting springs
3 TMT182 temperature head transmitter
4 Circlips
5 Terminal box
#Warning!
• The TMT182 is not designed for use in hazardous areas.
Mounting the temperature head transmitter:
1. Guide the mounting screws (item 1) with the mounting springs (item 2) through the guide
holes of the temperature head transmitter (item 3).
2. Fix the mounting screws with the circlips (item 4). Circlips, mounting screws and springs are
included in the scope of delivery for the temperature head transmitter.
3. Screw the temperature head transmitter into the field housing tightly.
(Max. width of screwdriver blade 6 mm)
#Warning!
• To prevent damage to the temperature head transmitter, do not tighten the mounting screw too
tightly.
➀
➂
➁
➃
➄
1
3
2
6
5
4
3
CLOSE
90°
OPEN
90°
Warning:
Avoid electrostatic charge in explosive atmosphere.
See instructions

Installation Waterpilot FMX21
14 Endress+Hauser
!Note!
A minimum distance of 7 mm must be maintained between the terminal strip and the TMT182
temperature head transmitter.
P01-FMX21xxx-06-xx-xx-xx-022
3.4 Post-installation check
Check that all screws are firmly seated.
>7
(>0.27)
mm (inch)

Waterpilot FMX21 Wiring
Endress+Hauser 15
4 Wiring
4.1 Connecting the device
!Note!
When using the measuring device in hazardous areas, installation must comply with the applicable
national standards and regulations and the Safety Instructions (XAs) or the Installation or Control
Drawings (ZDs).
• The supply voltage must match the supply voltage on the nameplate (see also →ä6,
Section 2.1.1).
• Switch off the supply voltage before connecting the device.
• The cable must end in a dry room or a suitable terminal box. The IP66/IP67 terminal box with
a GORE-TEX®from Endress+Hauser is suitable for outdoor installation (see also →ä13,
Section 3.3.3 "Mounting the terminal box").
• Connect the device in accordance with the following diagrams. Reverse polarity protection is
integrated in the Waterpilot FMX21 and the TMT182 temperature head transmitter. Changing
the polarities will not result in the destruction of the devices.
• A suitable circuit breaker should be provided for the device in accordance with IEC/EN 61010.
FMX21 FMX21 with Pt100 1)
P01-FMX21xx-04-xx-xx-xx-008
Fig. 8: Electrical connection
mNot for FMX21 with an outer diameter of 29 mm
P01-FMX21xx-04-xx-xx-xx-006
Fig. 9: Electrical connection
Version "NB" for feature 610 "Accessories" in
the order code (→ see Technical Information
TI431P, "Ordering information" section).
Wire colors: RD = red, BK = black, WH = white, YE = yellow, BU = blue, BR = brown
1) Not for use in hazardous areas.
RDBK
FMX21
RL
4…20 mA
10,5…35VDC
10,5…30VDC(Ex ia)
➀
FMX21
Pt 100
RDBK
WH
YE BU
BR
10,5…35VDC
4…20 mA
R
L
➀

Wiring Waterpilot FMX21
16 Endress+Hauser
1) Not for use in hazardous areas.
4.1.1 Connection data
Connection classification as per IEC 61010-1:
• Overvoltage category 1
• Pollution degree 1
Connection data in the hazardous area
Waterpilot FMX21 with Pt100 and TMT182 temperature head transmitter
(4 to 20 mA/HART) 1)
P01-FMX21xxx-04-xx-xx-xx-007
Fig. 10: FMX21 with Pt100 and TMT182 temperature head transmitter (4 to 20 mA/HART), version "PT" for feature
620 in the order code (→see Technical Information TI431P, "Ordering information" section).
mNot for FMX21 with an outer diameter of 29 mm
Wire colors: RD = red, BK = black, WH = white, YE = yellow, BU = blue, BR = brown
4 to 20 mA Ex ia IIC T4...T6
Ui 30 V DC
Ii 133 mA
Pi 1.0 W
Ci 10.3 nF (sensor) / 180 pF/m (cable)
Li 0 μH (sensor) / 1 μH/m (cable)
Ta –10 °C ≤Ta ≤+70 °C for T4; –10 °C ≤Ta ≤+40 °C for T6
2
1
6
5
4
3
Pt 100
RDBK
WH
YE BU
BR
FMX21
4…20 mA
10,5…35VDC
4…20 mA
R
L
R
L
➀
11,5…35VDC
TMT182 (4…20 mA)

Waterpilot FMX21 Wiring
Endress+Hauser 17
4.1.2 Supply voltage
!Note!
When the device is used in hazardous areas, the supply voltage is restricted as above in accordance
with the requirements of the certificate in question.
4.1.3 Cable specification
• FMX21 with optional Pt100
– Commercially available, shielded instrument cable
– Terminals, terminal box: 0.08 to 2.5 mm2
• TMT182 temperature head transmitter (optional)
– Commercially available instrument cable
– Terminals, terminal box: 0.08 to 2.5 mm2
– Transmitter terminals: max. 1.75 mm2
!Note!
The extension cables are shielded for versions with outer diameters of 22 mm or 42 mm. In the
following cases Endress+Hauser recommends the use of a shielded cable as the cable extension:
• For large distances between the end of the extension cable and the display and/or evaluation unit
• For large distances between the end of the extension cable and the temperature head transmitter
• When directly connecting the Pt100 signal to a display and/or evaluation unit
4.1.4 Power consumption/current consumption
Version Supply voltage
FMX21 FMX21 + Pt100 TMT182 temperature
head transmitter
Version for the non-hazardous
area
10.5 to 35 V DC 10.5 to 35 V DC 11.5 to 35 V DC
Version for the hazardous area 10.5 to 30 V DC – –
FMX21 FMX21 + Pt100 TMT182 temperature head
transmitter
Power
consumption
≤0.805 W at 35 V DC
(non-hazardous area)
≤0.690 W at 30 V DC
(hazardous area)
≤0.805 W at 35 V DC ≤0.805 W at 35 V DC
Current
consumption
Max. ≤23 mA
Min. ≥3.6 mA
Max. ≤23 mA
Min. ≥3.6 mA
Pt100: ≤0.6 mA
Max. ≤23 mA
Min. ≥3.5 mA

Wiring Waterpilot FMX21
18 Endress+Hauser
4.1.5 Load
The maximum load resistance depends on the supply voltage (U) and must be determined
individually for each current loop, see formula and diagrams for FMX21 and temperature head
transmitter.
The total resistance resulting from the resistances of the connected devices, the connecting cable
and, where applicable, the resistance of the extension cable may not exceed the load resistance
value.
FMX21 Temperature head transmitter
P01-FMX21xx-16-xx-xx-en-000 P01-FMX21xx-16-xx-xx-xx-001
R
Lmax
£–2•0.9•l–R
add
U–10,5 V
23 mA
W
mR
tot
£–R
add
U–11,5 V
0.023 A
RLmax = Max. load resistance [Ω]
Radd = Additional resistances such as resistance of evaluation unit and/or display unit,
cable resistance [Ω]
U = Supply voltage [V]
l=Simple length of extension cable [m] (cable resistance per wire ≤ 0.09 Ω/m)
P01-FMX21xxxx-05-xx-xx-xx-000
Fig. 11: FMX21 load chart for estimating the load
resistance. Additional resistances, such as the
resistance of the extension cable, have to be
subtracted from the value calculated as shown
in the equation.
P01-FMX21xx-05-xx-xx-xx-003
Fig. 12: Temperature head transmitter load chart for
estimating the load resistance. Additional
resistances have to be subtracted from the
value calculated as shown in the equation.
413
630
195
R
[]W
[V]
U
1065
35
20 25
10,5 15
R
[]W
[V]
U
847
30
370
587
152
R
[]W
[V]
U
1022
35
20 25
11,5 15
R
[]W
[V]
U
804
30

Waterpilot FMX21 Wiring
Endress+Hauser 19
4.2 Connecting the measuring unit
4.2.1 Overvoltage protection
To protect the Waterpilot and the TMT182 temperature head transmitter from large interference
voltage peaks, Endress+Hauser recommends installing overvoltage protection upstream and
downstream of the display and/or evaluation unit as shown in the graphic.
P01-FMX21xx-14-xx-xx-en-006
Fig. 13: Measuring unit electrical connection
1 Power supply, display and evaluation unit with one input for Pt100
2 Power supply, display and evaluation unit with one input for 4 to 20 mA
3 Power supply, display and evaluation unit with two inputs for 4 to 20 mA
OP Overvoltage protection e.g. HAW from Endress+Hauser (not for use in hazardous areas)
!Note!
Further information on the TMT182 temperature head transmitter for HART applications from
Endress+Hauser can be found in "Technical Information" TI078R/09/EN.
Pt100
Pt100 4…20 mA
➀
➁
➁
➂
FMX21 + Pt100
4…20 mA
4…20 mA
4…20 mA
Power
supply
Temperature
Temperature
Level
Level
OP
OP
OP
OP
Power
supply
OP
OP
Power
supply
OP

Wiring Waterpilot FMX21
20 Endress+Hauser
4.2.2 Connecting the HART handheld terminal
With a HART handheld terminal, you can configure and check the transmitter, and use additional
functions, all along the 4 to 20 mA cable.
P01-FMX21xxxx-04-xx-xx-xx-002
Fig. 14: Connecting the HART handheld terminal, here Field Communicator DXR375, for example
1 Necessary communication resistor ≥250 Ω
2 HART handheld terminal, approved for hazardous areas (Ex ia)
3 HART handheld terminal, approved for hazardous areas (Ex ia), directly connected to the device even in the Ex area
#Warning!
• Do not change the battery of the handheld terminal in the hazardous area.
• When using the measuring device in hazardous areas, installation must comply with the
applicable national standards and regulations and the Safety Instructions (XAs) or the Installation
or Control Drawings (ZDs).
EX EX
4…20 mA
min. 250 W
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1 Language
2 Display/Operat.
4 Diagnosis
3.999mA
3 Setup
0.01mbar
5 Expert
4 PV
7 PV Loop current
2 Display/Operat.
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2 Display/Operat.
4 Diagnosis
3.999mA
3 Setup
0.01mbar
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4 PV
7 PV Loop current
2 Display/Operat.
1 Language
2 Display/Operat.
4 Diagnosis
3.999mA
3 Setup
0.01mbar
5 Expert
4 PV
7 PV Loop current
2 Display/Operat.