MPI Magnetostrictive Level Sensors
Installation Guide
For MPI-E, MPI-E Chemical, and MPI-R Intrinsically Safe
R
APG
Automation Products Group, Inc.
1025 W 1700 N Logan, UT 84321
www.apgsensors.com | phone: 888-525-7300 | email: [email protected]
Thank You
Thanks for purchasing an Series MPI Intrinsically Safe magnetostrictive level sensor from us! We
appreciate your business and your trust. Please take a moment to familiarize yourself with the
product and this manual before installation. If you have any questions, at any time, don’t hesitate to
call us at 888-525-7300.
1.Description
2. How To Read Your Label
3. Warranty
4. Dimensions
5. Installation Guidelines &
Instructions
6. Sensor and System Wiring
7.General Care
8. Repair Information
9. Hazardous Location Wiring
Table of Contents
5
Installation Guidelines & Instructions
The MPI should be installed in an area--indoors or outdoors--which meets the following
conditions:
• Ambient temperature between -40°F and 185°F (-40°C to 85°C)
• Relative humidity up to 100%
• Altitude up to 2000 meters (6560 feet)
• IEC-664-1 Conductive Pollution Degree 1 or 2
• IEC 61010-1 Measurement Category II
• No chemical corrosive to stainless steel (such as NH
3
, SO
2
, Cl
2
, etc.)
• Ample space for maintenance and inspection
Additional care must be taken to ensure:
• The probe is located away from strong magnetic elds, such as those produced by motors,
transformers, solenoid valves, etc.
• The medium is free from metallic substances and other foreign matter.
• The probe is not exposed to excessive vibration.
• The oat(s) t through the mounting hole. If the oat(s) does/do not t, it/they must be
mounted on the stem from inside the vessel being monitored.
• The oat(s) is/are oriented properly on the stem (See Figure 5.1 below). MPI-E oats will be
installed by the factory. MPI-R oats are typically installed by customer.
4
Dimensions
NOTE: Scan the QR code to the right to see the full
user manual on your tablet or smartphone. Or visit
www.apgsensors.com/support to nd it on our website.
Part # 200339
Doc #9005625 Rev A
Each label comes with a full model number, a part number, and a serial number. The model
number for the MPI will look something like this:
The model number correlates with all the congurable options and tells you exactly what you have.
Compare the model number to the options on the datasheet to identify your exact conguration.
You can also call us with the model, part, or the serial number and we can help you.
You’ll also nd all hazardous certication information on the label.
SAMPLE: MPI-R5-ZY-F2.5WB-120-4D
The MPI series magnetostrictive level sensor provides highly accurate and repeatable level readings
in a wide variety of liquid level measurement applications. It is certied for installation in Class I,
Division 1, and Class I, Zone 0 hazardous areas in the US and Canada by CSA, and ATEX and IECEX
for Europe and the rest of the world.
1
Description
2
How To Read Your Label
3
Warranty
MPI-E Housing Dimensions MPI-R Housing Dimensions
Figure 5.1
UP
Taper
This product is covered by APG’s warranty to be free from defects in material and workmanship
under normal use and service of the product for 24 months. For a full explanation of our Warranty,
please visit https://www.apgsensors.com/about-us/terms-conditions. Contact Technical Support to
receive a Return Material Authorization before shipping your product back.
Scan the QR code below to read the full explanation of our Warranty on your tablet or smartphone.
IMPORTANT: Floats must be oriented properly
on the stem, or sensor readings will be inaccurate
and unreliable. Untapered oats will have a sticker
indicating the top of the oat. Remove sticker prior to
use.
ATEX Stated Conditions of Use:
• Under certain extreme circumstances, the non-metalic parts incorporated in the enclosure of
this equipment may generate an ignition-capable level of electrostatic charge. Therefore the
equipment shall not be installed in a location where the external conditions are conducive to
the build-up of electrostatic charge on such surfaces. In addition, the equipment shall only be
cleaned with a damp cloth.
• The enclosure is manufactured from Aluminum. In rare cases, ignition sources due to impact
and friction sparks could occur. This shall be considered during installation.
Installation Instructions:
• If your sensor’s stem and oats t through the mounting hole, carefully lower the assembly
into the vessel, then secure the sensor to the vessel.
• If the oats do not t, mount them on the stem from inside the vessel being monitored. Then
secure the sensor to the vessel.
• For sensors with oat stops, refer to the assembly drawing included with the sensor for oat
stop installation locations.
• For MPI-E Chemical, ensure probe is concentric with tting so as not to scrape chemical
resistant coating o against threads of tting.
Electrical Installation Instructions:
• Remove the housing cover of your MPI.
• Feed system wires into MPI through 3/4” NPT conduit openings. Fittings must be UL/CSA
Listed for CSA installation.
• Connect wires to MPI terminals. Use crimped ferrules on wires, if possible.
• Replace housing cover.
See Sensor and System Wiring Diagrams (section 6) for Modbus wiring examples.
MPI-E Chemical Housing Dimensions
4.21”
3.74”
7.07”
6.28”
5.00”
4.25”
5.71”
4.92”
Ø 0.27”
3/4” NPT
2.13”
5.94”
4.15”
ZERO
REFERENCE
3/4” NPT
Housing
Connection
Location
Note:
For dual dimensions, large
housing dimensions are above
small housing dimensions.
4.21”
3.74”
7.32-7.44”
6.53-6.65”
5.00”
4.25”
5.71”
4.92”
Ø 0.27”
3/4” NPT
2.38”
4.94”
4.15”
GND
SCREW
ZERO
REFERENCE
3/4” NPT
Housing
Connection
Location
Note:
For dual dimensions, large
housing dimensions are
above small housing
dimensions.
5.00”
5.71”
Ø 0.27”
4.21”
6.84” - 6.97”
3/4” NPT
1.90”
4.94”
GND
SCREW
ZERO
REFERENCE
3/4” NPT
Housing
Connection
Location
6
Sensor and System Wiring Diagrams
9
Hazardous Location Wiring
IMPORTANT: Refer to section 9 for Hazardous Location Wiring.
NOTE: For APG Modbus programming instructions, please see MPI
user manual. APG Modbus software can be downloaded from www.
apgsensors.com/support.
MPI-E/R Intrinsically Safe Modbus System Wiring MPI-E/R Intrinsically Safe Modbus System Wiring with RST-6001
IMPORTANT: MPI level sensor MUST be installed according to drawing 9005491
(Intrinsically Safe Installation Drawing for Hazardous Areas) in section 9 to meet listed
approvals. Faulty installation will invalidate all safety approvals and ratings.
DANGER: WARNING -- EXPLOSION HAZARD -- SUBSTITUTION OF COMPONENTS MAY
IMPAIR SUITABILITY FOR CLASS I, DIVISION 2;
AVERTISSEMENT -- RISQUE D’EXPLOSION -- LA SUBSTITIOND E COMPOSANTSP EUTR
ENDRE CE MATERIEL INACCEPTABLE POUR LES EMPLACEMENTS DE CLASSE I, DIVISION 2.
DANGER: WARNING -- EXPLOSION HAZARD -- DO NOT DISCONNECT EQUIPMENT
UNLESS POWER HAS BEEN SWITCHED OFF OR THE AREA IS KNOWN TO BE NON-
HAZARDOUS;
AVERTISSEMENT -- RISQUE D’EXPLOSION -- AVANT DE DECONNECTER L’EQUIPEMENT,
COUPER LE COURANT OU S’ASSURER QUE L’EMPLACEMENT EST DESIGNE NON
DANGEREUX.
DANGER: OPEN CIRCUIT BEFORE REMOVING COVER or KEEP COVER TIGHT WHILE
CIRCUITS ARE ALIVE;
AVERTISSEMENT -- COUPER LE COURANTAVANT D’ENLEVER LE COUVERCLE, ou GARDER
LE COUVERCLE FERME TANT QUE LES CIRCUITS SONT SOUS TENSION.
7
General Care
Your level sensor is very low maintenance and will need little care as long as it was installed
correctly. However, in general, you should periodically inspect your MPI unit to ensure the stem
is free of any heavy buildup that might impede the movement of the oat(s). If sediment or other
foreign matter becomes trapped between the stem and oat(s), detection errors can occur.
If you need to remove the oats(s) from the stem of your MPI, be sure to note the orientation of the
oat(s) prior to removal. This will help ensure proper re-installation of the oat(s).
Also, ensure that the housing cover is snuggly secured. If the cover becomes damaged or is
misplaced, order a replacement immediately.
8
Repair Information
The MPI-E Chemical’s chemical resistant coating is a durable thermoplastic. This means that if
damage occurs, repair is possible:
• Use a heat gun on a low setting to heat the damaged location until coating becomes soft and
malleable. If coating begins to ripple or bubble, too much heat has been applied.
• With a blunt object, gently smear the coating to recover the damaged area.
• Allow chemical resistant coating patch to cool before reinstalling probe.
• Keep MPI-E Chemical probe and chemical resistant coating away from ammable material
during patching process.
If your MPI level sensor needs repair, contact us via email, phone, or online chat on our website. We
will issue you an RMA number with instructions.
• Phone: 888-525-7300
• Email: [email protected]
• Online chat at www.apgsensors.com
NOTE: For MPI-E Chemical sensors: Chemical resistant coating will
scar and expose stainless steel if scraped or abused. Use caution
when handling. Always transport in packaging to protect probe and
coating.
IMPORTANT: All repairs and adjustments of the MPI level sensor must be made by the
factory. Modifying, disassembling, or altering the MPI, other than patching the chemical
resistant coating on an MPI-E Chemical probe, is strictly prohibited.
Power
Supply
+8-24 Vdc
GND
Use Shielded Cable
120 Ω terminating resistor
may be necessary for long
cable runs.
V+
B (TX-)
A (TX+)
Sensor 1
GND
V+
B (TX-)
A (TX+)
Sensor 2
GND
V+
B (TX-)
A (TX+)
Sensor 3
GND
Master
Device
RS-485 A (TX+)
RS-485 B (TX-)
MPI Sensor MPI Sensor MPI Sensor
Note: When connecting MPI
sensors to your system, reversing
A and B connections may be necessary
if sensors do not communicate with
Modbus Master device.
120 Ω terminating resistor across A & B
terminals of last or only sensor, if necessary.
For installations without IS barriers only.
Wiring T’s must be located on
controller/supply side of IS barriers.
See Hazardous Installation
Drawing for Intrinsically Safe
installation requirements.
Otherwise, wire directly.
See Hazardous Installation
Drawing for Intrinsically Safe
installation requirements.
Otherwise, wire directly.
See Hazardous Installation
Drawing for Intrinsically Safe
installation requirements.
Otherwise, wire directly.
Power
Supply
+8-24 Vdc
GND
Use Shielded Cable
Equivalent 120 Ω
terminating resistor
internal to RST-6001
USB to computer
with APG Modbus
software
RST-6001
Modbus
Controller
V+
B
A
Sensor 1
GND
V+
B
A
Sensor 2
GND
V+
B
A
Sensor 3
GND
A
B
-5V
MPI sensor
+5V
MPI sensor MPI sensor
Note: An independent +8-24 Vdc
power supply is required when using
an RST-6001 Modbus Controller. The
RST-6001 can only supply ±5 Vdc, not
the +8-24 Vdc required by the MPI.
Wiring T’s must be located on
controller/supply side of IS barriers.
120 Ω terminating resistor across A & B
terminals of last or only sensor, if necessary.
For installations without IS barriers only.
See Hazardous Installation
Drawing for Intrinsically Safe
installation requirements.
Otherwise, wire directly.
See Hazardous Installation
Drawing for Intrinsically Safe
installation requirements.
Otherwise, wire directly.
See Hazardous Installation
Drawing for Intrinsically Safe
installation requirements.
Otherwise, wire directly.
APPROVALS DATE
FINISH
MATL
APVD
CHKD
DRWN
SIZE
A
VERON TNEMUCODON TRAPEDOC EGAC
SHEET OF
CONTRACT
888.525.7300
Logan, Utah USA
1025 West 1700 North
APPROVEDDATECHANGE ORDERDESCRIPTIONREVZONE
REVISIONS
CO-3441 retsedihC .C8102/92/8.esaeler laitinI-- A
C. Chidester
S. Hutchins
R. Barson
6/5/2018
8/29/2018
8/29/2018
A
11
for Hazardous Locations
Intrinsically Safe Installation Drawing
MPI Series
PROPRIETARY AND CONFIDENTIAL
LOGAN, UTAH AND MAY NOT BE
USED, REPRODUCED, PUBLISHED, OR
IN ANY WAY DIRECTLY OR INDIRECTLY
THIS DRAWING IS THE PROPERTY OF
AUTOMATION PRODUCTS GROUP, INC.
DISCLOSED TO OTHERS WITHOUT
IF LOANED, IT IS SUBJECT TO RETURN
UPON DEMAND AND MAY NOT BE USED
WRITTEN CONSENT OF THE COMPANY.
DETRIMENTAL TO THE COMPANY.
9005491VARIOUS
RS-485 B
RS-485 A
V+
V- (GND)
MPI
Vmax (or Ui) = 28V
Unclassified Location
Imax (or Ii) = 280mA
Pi = 850mW
Ci = 0.374uF
Li = 3.50uH
Associated Apparatus
Voc (or Uo) ≤ Vmax (or Ui)
Hazardous Location
Class I, Zone 0, AEx ia IIB T4 Ga
Isc (or Io) ≤ Imax (or Ii)
Po ≤ Pi
Ca (or Co) ≥ Ci + Ccable
La (or Lo) ≥ Li + Lcable
with Entity Parameters
Ex ia IIB T4 Ga, Ta -40°C to 85°C
- Installation must be in accordance with NEC Articles 504 and 505.
Class I, Division 1, Groups C,D T4
52797
MDI
Modbus Address: Master
Controling: Sensor 1
MPI Sensor
Modbus Address: 1
Hazardous Area
Zone 1
Zone 0 or Zone 1
MDI
Modbus Address: Master
Controling: Sensor 1
MPI Sensor
Modbus Address: 1
Hazardous AreaNon-hazardous Area
Approved
IS Barrier
Passive Control Equipment
Modbus: Sniffer
Sniffing: MDI
Zone 1
Zone 0 or Zone 1
MPI - MDI Use Case Diagram MPI - MDI with Passive Controller Use Case Diagram
-
1
-
2
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