APG MPX Slave Sensor User Manual

AUTOMATION

Operator’s Manual

P R O D U C T S

GROUP, INC.

MPX

Series

Magnetostrictive Level Sensors

Doc 9003761

Rev. B 4/13

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MPX Series Magnetostrictive Level Sensors Rev. B, 4/13

Table of Contents

Warranty ........................................................................................ 3

How does it work?

Installaon

Wiring

...................................................................................... 5

.......................................................................................... 6-8

.......................................................................... 4

 HazardousLocaonWiring ......................................................... 8

Communicaons/Soware

........................................................ 9-15

 ConguringtheSoware...................................................... 10-11

 MulpleSensorCommunicaons ......................................... 12-13

 UsingtheProgrammingWindow ......................................... 14-15

Modbus Register Lists ........................................................... 16-17

SensorProgramming ............................................................... 18-34

 ApplicaonParameters ........................................................ 14-29

 SignalProcessingandControl(advancedonly) .................... 30-31

 4-20mASengs ....................................................................... 32

Web Alarms .......................................................................... 33-34

 SavingandRecallingSensorSengs ......................................... 35

InspeconandMaintenance ........................................................ 36

Specicaons

Dimensions

................................................................................ 37

.............................................................................. 38-39

CercateofCompliance ........................................................ 40-43

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Rev. B, 4/13 MPX Series Magnetostrictive Level Sensors

•Warranty and Warranty Restricons

APG warrants its products to be free from defects of material and
workmanship and will, without charge, replace or repair any equipment

found defecve upon inspecon at its factory, provided the equipment
has been returned, transportaon prepaid, within 24 months from date

of shipment from factory.

THE FOREGOING WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER
WARRANTIES NOT EXPRESSLY SET FORTH HEREIN, WHETHER EXPRESSED
OR IMPLIED BY OPERATION OF LAW OR OTHERWISE INCLUDING BUT
NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE.

No representaon or warranty, express or implied, made by any sales
representave, distributor, or other agent or representave of APG
which is not specically set forth herein shall be binding upon APG.
APG shall not be liable for any incidental or consequenal damages,
losses or expenses directly or indirectly arising from the sale, handling,
improper applicaon or use of the goods or from any other cause
relang thereto and APG’s liability hereunder, in any case, is expressly
limited to the repair or replacement (at APG’s opon) of goods.

Warranty repairs are made specically at the factory. Any on site service
will be provided at the sole expense of the Purchaser at standard eld
service rates.

All associated equipment must be protected by properly rated

electronic/electrical protecon devices. APG shall not be liable for any
damage due to improper engineering or installaon by the purchaser
or third pares. Proper installaon, operaon and maintenance of the

product becomes the responsibility of the user upon receipt of the
product.

Returns and allowances must be authorized by APG in advance. APG
will assign a Return Material Authorizaon (RMA) number which must

appear on all related papers and the outside of the shipping carton. All

returns are subject to the nal review by APG. Returns are subject to
restocking charges as determined by APG’s “Credit Return Policy”.

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MPX Series Magnetostrictive Level Sensors Rev. B, 4/13

• How does it work?

The MP series level sensors are based on magnetostricve technology.
Inside the stainless steel stem is a wire waveguide made of a metal that has
magnetostricve properes. Magnetostricve means that the atoms in
the metal realign in the presence of a magnec eld causing the metal to
temporarily deform or elongate very slightly. Inside the oat(s) are permanent
magnets. When a quick pulse of current is sent through the wire waveguide,
the magnec eld generated by the current pulse interacts with the magnec
eld of the oat(s) to realign the atoms in the waveguide. This results in a
rapid torsion that sends vibraons through the waveguide at near the speed
of sound. The sensor picks up the vibraon pulse, and through precisely
measuring the me elapsed between the current pulse and the torsion
vibraon, determines with precision the locaon of the oat. The MP has the
capability to simultaneously monitor two oats on a single stem, giving it the
ability to measure an oil/water interface level in addion to the total tank level.

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Rev. B, 4/13 MPX Series Magnetostrictive Level Sensors

• Installaon

The MPX should be installed in an area, indoors or outdoors, which meets the

following condions:

• The ambient temperature does not exceed -40oC to 85oC (-40oF to

+185oF)

• Relave humidity up to 100%

• Polluon Degree 2

• Measurement Category II

• Altude 2000 meters or less.

• Locate the Probe away from strong magnec elds, such as those pro­duced by motors, transformers, solenoid valves, etc.

• The medium is free from metallic substances and other foreign maer.

• No corrosive gases such as NH3, SO2, Cl2, etc.

• No excessive vibraon

• Ample space for maintenance and inspecon.

NOTE: Assure proper orientaon when installing the oat(s) on the stem
(refer to drawing below). Installing the oat(s) upsidedown can result in

unstable readings.

Taper Markings

XXXX

NC

UP

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Modbus Daisy-Chain Wiring

MPX Series Magnetostrictive Level Sensors Rev. B, 4/13

• Sensor Wiring

All MPX models will operate on 10-24 Vdc. Always use a high quality power
source that will deliver clean, stable voltage.

Modbus RS-485 Wiring (MPX-E1 and MPX-R1 models)

Always use shielded cable. APG recommends using twisted-pair cable for all

Modbus network wiring.

+12-24 Vdc

Power
Supply

Master
Device

GND

RS-485 A

RS-485 B

120 Ω
terminating
resistor

Use Shielded Cable

B

V+

Sensor 1

120 Ω
terminating
resistor at last

A

GND

V+

Sensor 2

B

A

GND

B

V+

Sensor 3

sensor

A

GND

MPX-E1 and MPX-R1 wiring terminal

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Rev. B, 4/13 MPX Series Magnetostrictive Level Sensors

4-20 mA Loop Wiring (MPX-E2, MPX-R2 and MPX-E3, MPX-R3 models)

4-20 mA Loop Wiring

(MPX-E2 and MPX-R2 Series)

+

−

Sensor

12-24 Vdc

Out

Dual 4-20 mA Loop Wiring

(MPX-E3 and MPX-R3 Series)

Sensor

12-24 Vdc

Out 1

Out 2

Power Source

(12-24 Vdc)

Receiver

Input Com

−

+

Power Source

(12-24 Vdc)

Receiver

Input 1 Input 2 Com

OR

−

+

Sensor

12-24 Vdc

Out 1

Out 2

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Receiver 1

Input Com

Power Source

(12-24 Vdc)

Receiver 2

Input Com

7

MPX Series Magnetostrictive Level Sensors Rev. B, 4/13

Hazardous Locaon Wiring

C

0

Earth Ground

Connection

Hazardous Area

Non-Hazardous Area

Non-Incendive Wiring for Installation in

Class I Division 2 Groups C and D, Max. Tep. 85

C

0

Non-Hazardous Area

CSA/UL Listed Conduit

Certied Associated

Vmax = 28VDC,

Imax = 200ma,

Non-Incendive

Field Wiring Apparatus

Ci = 0nF, Li = 0

CSA/UL Listed Hazardous Location Cable

Vmax ≥ Voc,

Ca ≥ Ccable + Ci

La ≥ Lcable + Li

B

Hazardous Area

Earth Ground

A

Connection

A

Earth Ground

Connection

Install in accordance with Section 18 of the CEC or Article 500 of the NEC.

CSA listed or NRTL/UL listed conduit seal at location A & B.

Do NOT disconnect while circuit is live unless area is known to be non-hazardous

Installation in: Class I Division 1 & 2 Groups C and D, Max. Temp. 85

Ex d IIB : Ex nA IIB

Class I, Zone 1; AEx d IIB : Class I, Zone 2; AEx nA IIB

Tapering or replacement with non-factory components may adversely aect the safe use of the system.

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RST-4100

Rev. B, 4/13 MPX Series Magnetostrictive Level Sensors

• Sensor Communicaons

Modbus

(RS-485)

The MPX-E1 and MPX-R1 series ulizes standard Modbus RTU protocol (RS-

485). The sensor can only operate as a slave device. For more informaon
about Modbus RTU, please visit www.modbus.org.

The sensor will transmit at: 9600 baud, 8 bits, 1 Stop Bit, No parity (allow a
minimum delay of 300 ms between transacons).

4-20 mA (requires RST-4100 module)

MPX-E2, MPX-R2, MPX-E3, and MPX-R3 sensor versions require the RST-4100
module and the APG Modbus soware for programming.

A load resistance is required at the DC Common (GND) end of the current
loop in order to establish communicaons. The RST-4100 is wired in parallel

between the power source and the sensor, with the load resistance between

the “Out” leg connecon and the power source ground (as shown below).

To USB

Programming Module

(MPX-E2, MPX-R2, MPX-E3, and MPX-R3)

Wiring

RST-4100

Out 24V

Note: a minimum of
14 Vdc is required to

Sensor

12-24 Vdc

Out

Load Resistor

(100 Ω to 700 Ω)

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establish communications

+

Power Source

(14- 24 Vdc)

−

9

MPX Series Magnetostrictive Level Sensors Rev. B, 4/13

Conguring Soware Communicaons

All MPX versions use the same APG Modbus soware for sensor programming.
Use the following steps to congure the soware communicaons.

Step 1: select “Communicaon” from the “Congure” menu.

Step 2: select the appropriate Sensor Type, as shown below, then click the

“Save Cong” buon at the boom of the screen.

Modbus: select “MP*-*1”

(MPX-E1 and MPX-R1)

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4-20 mA: select “MP*-*2”

(MPX-E2, MPX-R2, MPX-E3, MPX-R3)

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Rev. B, 4/13 MPX Series Magnetostrictive Level Sensors

Step 3: select the mode of communicaon as shown below.

Modbus (RS-485):

(MPX-E1 and MPX-R1)

OR

Select the appropriate Comm Port
when using direct serial communica-

ons.

Check the “USB Communicaons
(RST-6001)” box when using the RST-

6001 communicaons module.

4-20 mA: check the box labeled “USB Communicaon (RST-4100)”

(MPX-E2, MPX-R2, MPX-E3, MPX-R3)

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MPX Series Magnetostrictive Level Sensors Rev. B, 4/13

Conguring Soware Communicaons for Mulple Sensors

Step 1: select the total number

of sensors you wish to read.

Step 2: change the “Sensor #”
boxes to match the address’ of

the target sensors.

Step 3: Change the Descripon labels as desired. The Descripon is
used to dierenate between sensors in other areas of the soware.

12

Step 4: Click “Save
Cong” then “Close”.

(connued)

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Rev. B, 4/13 MPX Series Magnetostrictive Level Sensors

Step 5: Click on “Start”. The sensor readings should
populate as the soware cycles through each sensor.

START

Step 6: Click on a sensor descripon to access that sensor’s parameters.

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MPX Series Magnetostrictive Level Sensors Rev. B, 4/13

Using the Soware Programming Window

Click on the desired sensor descripon to
open that sensor’s programming window.

Sensor readings are displayed
in the Input Registers table.

14

The register values should automacally populate. If not, click
“Receive All” to retrieve the register values from the sensor.

(connued on next page)

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Rev. B, 4/13 MPX Series Magnetostrictive Level Sensors

To change an individual parameter, click on the value
you wish to change, enter the desired value, then click
the adjacent “Send” buon to implement the change.

To send all the register values as
currently listed, click “Send All”

To retrieve the register values saved
in a sensor, click “Receive All”

A red window indi-

A green window

indicates successful

communicaon.

1500

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Send

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A yellow window

indicates a communi-

caon failure.

1500

Send

cates a value outside

the allowable limits

for the parameter.

150000

Send

15