APG MDI User Manual

APG

MDI

User Manual

Intrinsically Safe

Modbus Network Display and Controller

Doc #9005617

R

Part #200333

Rev A, 12/2019

Table of Contents

Introduction ................................................................................................................ iii

Warranty and Warranty Restrictions .................................................................... iv

Chapter 1: Specications and Options.....................................................................1

Dimensions ........................................................................................................................................1

Specications ...................................................................................................................................2

Model Number Congurator .......................................................................................................... 3

Wiring Diagram For Slave Sensor Connection .......................................................................... 4

Wiring Diagram For Passive Control Connection ..................................................................... 4

Wiring Diagram For RST-6001 Programming ............................................................................4

IS Use Case Diagrams ..................................................................................................................... 5

Chapter 2: Installation and Removal Procedures and Notes ..............................6

Tools Needed .....................................................................................................................................6

Physical Installation Notes ...........................................................................................................6

Mounting Instructions ................................................................................................................... 6

Electrical Installation .....................................................................................................................7

Removal Instructions ..................................................................................................................... 7

Chapter 3: User Interface and Access Modes ........................................................8

User Interface ................................................................................................................................... 8

MDI Setup Menus ............................................................................................................................ 9

Accessing Mode Options .............................................................................................................. 10

Chapter 4: Modbus Programming Notes .............................................................. 11

Modbus Programming ...................................................................................................................11

Modbus Programming via Internet ............................................................................................11

Modbus Programming with RST-6001 and APG Modbus Software .....................................11

Chapter 5: Maintenance ...........................................................................................12

General Care .................................................................................................................................... 12

Replacing Lithium Batteries ........................................................................................................ 12

Troubleshooting ............................................................................................................................. 13

Resetting MDI to Factory Standard Defaults ........................................................................... 13

Repair and Returns ........................................................................................................................ 13

Chapter 6: Programming and Parameter Conguration ...................................14

MDI Programming Generalizations ........................................................................................... 14

UNITS (Volume Units Label) ....................................................................................................... 14

ENTR (Enter Button Function) .................................................................................................... 14

AdVEST (Advanced Settings) .................................................................................................15-16

OUTPUT (Output Congurations) ......................................................................................... 17-21

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Table of Contents

COMM (Communications) .....................................................................................................22-25

SENLAB (Sensor Labels)...............................................................................................................26

PCTFUL (Percent Full) .................................................................................................................. 27

bLIGHT (Backlight) ........................................................................................................................ 28

Chapter 7: Hazardous Drawing & Certicate ........................................................29

Hazardous Installation Drawing .................................................................................................29

CSA Certicate of Compliance .............................................................................................. 30-32

IECEx Certicate of Conformity ........................................................................................... 33-36

EU Declaration of Conformity ..................................................................................................... 37

Appendices ..................................................................................................................38

Appendix A: MDI Factory Default Settings ..............................................................................38

Appendix B: MNU IS Modbus Registers ...................................................................................39

Appendix C: MPI Modbus Registers ..........................................................................................40

Appendix D: MDI Modbus Registers .................................................................................... 41-42

Introduction

Thank you for purchasing an MDI Intrinsically Safe Modbus Network Display and Controller from APG. We
appreciate your business! Please take a few minutes to familiarize yourself with your MDI and this manual.

The MDI Intrinsically Safe Modbus Network Display and Controller provides a local display in a Class I, Zone
1 area that can monitor and control a sensor within a Class I, Zone 0 or Class I , Zone 1 hazardous area. The
MDI can supply power to the sensor it controls, creating a complete monitoring-and-control system within
the hazardous area. The MDI can also be connected to monitoring equipment outside the hazardous area
through an IS barrier, allowing readings from the sensor to be seen across a montioring or control network.

The MDI features a large 5-digit display, IP66-rated housing options, and user selectable units of measure.

Reading your label

Every APG instrument comes with a label that includes the instrument’s model number, part number, serial
number, and a wiring/pinout table. Please ensure that the part number and pinout table on your label
match your order. The following electrical ratings and approvals are also listed on the label. Please refer to

the Certicate of Compliance at the back of this manual for further details.

 IMPORTANT: Your MDI MUST be installed according to drawing 9005447 (Intrinsi-

cally Safe Installation Drawing For Hazardous Locations) to meet listed approvals. Faulty
installation will invalidate all safety approvals and ratings.

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iii

Electrical ratings

237484

Rated for Modbus Outputs and Battery Power only
Class I Zone 1
AEx ib [ia Ga] IIB 142°C (T3) Gb
Ex ib [ia Ga] IIB 142°C (T3) Gb, Ta: -30°C to 85°C

C

Vmax Ui= 12VDC, Imax Ii = 30mA, Pmax Pi = 100mW, Ci = 0.33μF, Li = 0mH
Uo= 12VDC, Io = 136mA, Po = 809mW, Co = 0.65μF, Lo = 7.7mH
Install in accordance with drawing 9005447

ATEX Certicate Number: Sira 18ATEX2289X

II 2G
Ex ib [ia Ga] IIB 142°C (T3) Gb
Ta = -30°C to 85°C
IP66

IECEx SIR 18.0076X
Ex ib [ia Ga] IIB 142°C (T3) Gb
Ta = -30°C to 85°C
IP66

US

Intrinsically Safe Wiring Requirements:

DANGER: OPEN CIRCUIT BEFORE REMOVING COVER or KEEP COVER TIGHT WHILE CIRCUIT IS ALIVE;

AVERTISSEMENT -- COUPER LE COURANT AVANT D’ENLEVER LE COUVERCLE, OU GARDER LE COUVERCLE
FERME TANT QUE LE CIRCUIT EST SOUS TENSION.

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.

Warranty and Warranty Restrictions

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.

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Chapter 1: Specications and Options

• Dimensions

4.92”

125 mm

External

Decrease/Power

Button

105.5 mm

4.09”

104 mm

4.15”

Position 1

4.25”

108 mm

3” Aluminum Housing

Grounding Screw

Position 2

7 mm hole

External

Decrease/Power

Button

4.94”

125.5 mm

4.53”

115 mm

Position 1

4.96”

126 mm

4” Aluminum Housing

5.71”

145 mm

Grounding Screw

Position 2

7 mm hole

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• Specications

Performance

Digital Communication RS-485 (Modbus RTU)

RS-485 Baud Rate 2400, 9600, 19200, 38400

Environmental

Operating Temperature -30 to 85°C (-22 to 185°F)
Storage Temperature -45 to 90°C (-49 to 194°F)
Enclosure Protection IP66 - 3” Ø or 4” Ø Aluminum Housing

Electrical

Battery Voltage (3) AA 3.6V Lithium

Masterials of Construction

Aluminum Housing Pressure die casting, 0.5% Mg
Chemically resistant paint

Mounting

Standard No mounting hardware provided

Compatible Intrinsically Safe APG Modbus Senors

Ultrasonic MNU IS
Magnetostrictive MPI-E, MPI-R, MPI-E Chemical, MPI-F, MPI-T

IMPORTANT: USE ONLY THREE (3) SAFT MODEL LS14500 OR THREE (3) XENO MODEL XL-060F BAT-

TERIES. FAILURE TO USE ONLY APPROVED BATTERIES WILL VOID INTRINSIC SAFETY RATING;
IMPORTANT -- UTILISEZ SEULEMENT TROIS (3) BATTERIES SAFT MODÈLE LS14500 OU TROIS (3) BATTERIES
XENO MODÈLE XL-060F. LA NON UTILISATION DE PILES APPROUVÉES ANNULERA LA CERTIFICATION DE
SÉCURITÉ INTRINSEQUE.

DANGER: DO NOT REPLACE BATTERIES WHEN EXPLOSIVE ATMOSPHERE IS PRESENT;

AVERTISSEMENT -- NE PAS REMPLACER LES PILES EN PRESENCE D’UNE ATMOSPHÈRE EXPLOSIVE.

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• Model Number Congurator

Model Number: MDI - __9__ __4__ __0__ _____ __0__ - _____ _____ - _____ _____ - _____ - __B0__
A B C D E F G H I J K

A. Power

▲

□ 9

Batteries (3) AA 3.6V Lithium Parallel

B. Output

□ 4▲ Modbus RTU, IS Rated

C. Relays

▲

□ 0

No Relays

D. Enclosure

□ 2▲ 3” Aluminum (1/2” NPT cable entry)

□ 3 4” Aluminum (3/4” NPT cable entry)

E. Mounting/Cover

▲

□ 0

Standard Mounting

F. Main Connection Location†

▲

□ 1

Position 1

□ 2 Position 2

H. Auxiliary Connection Location†

▲

□ 0

No Auxiliary Connection

□ 1 Position 1
□ 2 Position 2

I. Auxiliary Cable or Connector

▲

□ 0

No Auxiliary Connection

□ C_ Cable, in feet, with ying leads

(ex. C100 = 100 feet, 5 ft increments only)

□ M_ Cable, in feet, with connector

(ex. M5C5 = 4 pin M12 Female connector with
5 feet of cable, avail. in 5 ft increments only)
□ __ Connector only
(select from Connector Table below)

Connector Table

□ 2 4 pin M12 Male
□ 5 4 pin M12 Female

J. Backlight

▲

□ 0

No Backlight

□ 1 Backlight (decreases battery life)

G. Main Cable or Connector

□ C_ Cable, in feet, with ying leads

(ex. C100 = 100 feet, 5 ft increments only)

□ M_ Cable, in feet, with connector

(ex. M5C5 = 4 pin M12 Female connector with
5 feet of cable, avail. in 5 ft increments only)
□ __ Connector only
(select from Connector Table below)

Connector Table

□ 2 4 pin M12 Male
□ 5 4 pin M12 Female

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K. Factory Use Only

▲

□ B0

▲

This option is standard.

†Note: Auxiliary Connection Location (when used) cannot

be the same as the Main Connection Location.

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• Wiring Diagram For Slave Sensor Connection

MDI - Slave Sensor Connection

TX A

TX B

Slave

Sensor

+VDC

DC Gnd

M12

4 Pin

1 BRN

2 WHT

3 BLU

4 BLK

4/C

Red

White

Black

Green

Slave Pwr

TX A

DC Gnd

TX B

• Wiring Diagram For Passive Control Connection

MDI - Passive Control Connection

Auxilliary

Connection

M12

4 Pin

1 BRN

2 WHT

3 BLU

4 BLK

4/C

Red

White

Black

Green

SW+

TX A

SW-

TX B

IS

ControllerBarrier

TX A

TX B

SW+

SW-

Normally Open
Momentary Switch
For Remote Waking
of MDI.

• Wiring Diagram For RST-6001 Programming

Use Shielded Cable

-5V

+5V

A
B

MDI

4-Pin / Cable

Slave Out

A+

DC GND

B-

RST-6001

Modbus

Controller

USB to computer
with APG Modbus
software

Note: MDI must be removed from Hazardous
Location prior to connection to RST-6001,
and disconnected from RST-6001 prior to
installation in Hazardous Location.

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• IS Use Case Diagrams

MDI controlling single IS sensor

Hazardous Area

Zone 1

MDI
Modbus Address: Master
Controling: Sensor 1

Single MDI controlling a single IS sensor

• MDI is located in Zone 1 area. Sensor can be in Zone 0 or Zone 1 without additional barriers.

• MDI is battery powered; allows for software-based switchable power for sensor.

• No external controller.

• Any changes to sensor settings done via MDI buttons.

Zone 0 or Zone 1

Single IS Sensor
Modbus Address: 1

MDI controlling single IS sensor with Passive Control Equipment

Hazardous AreaNon-hazardous Area

Zone 1

MDI
Modbus Address: Master
Controling: Sensor 1

Passive Control Equipment

Modbus: Sniffer
Sniffing: MDI

Single MDI controlling a single IS sensor with Passive Control Equipment

• MDI is located in Zone 1 area. Sensor can be in Zone 0 or Zone 1 without additional barriers.

• MDI is battery powered; allows for software-based switchable power for sensor.

• External controller passively reads (Snis) readings from MDI.

• External controller can activate MDI.

• Approved IS Barrier required between Passive Control Equipment and MDI.

• Auxiliary connection required for MDI.

• Any changes to sensor settings done via MDI buttons.

Approved
IS Barrier

Zone 0 or Zone 1

Single IS Sensor
Modbus Address: 1

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Chapter 2: Installation and Removal Procedures and Notes

• Tools Needed

Installing the MDI requires tools appropriate to the fasteners being used (screw driver, socket driver, etc.).

• ATEX Stated Conditions of Use

• Install per Document #9005447.

• Use only three-SAFT model LS14500 or three-Xeno model XL-060F battery cells.

• Do not replace batteries when an explosive atmosphere is present.

• The enclosure is manufactured from aluminum. In rare cases, ignition sources due to impact and
friction could occur. This shall be considered during installtion.

• Physical Installation Notes

The MDI should be installed in an area--indoors or outdoors--which meets the following conditions:

• Ambient temperature between -30°C and 85°C (-22°F to +185°F)

• 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 chemicals corrosive to stainless steel (such as NH

• Ample space for maintenance and inspection



IMPORTANT: Your MDI MUST be installed according to drawing 9005447 (Intrinsical-

, SO2, Cl2 etc.) or aluminum

3

ly Safe Installation Drawing For Hazardous Locations) as indicated above to meet listed
approvals. Faulty installation will invalidate all safety approvals and ratings.

• Mounting Instructions

Specic mounting steps may vary based on mounting methods being used.

A general approach is as follows:

• Use fasteners through 7mm holes on either side of housing for surface mounting of MDI.

• For conduit mounting, make electrical connections (see Electrical Installation, below) prior to nal con­duit connections.

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• Electrical Installation

For MDI Controlling Single IS Sensor:

• For MDI with connector: Mate connector to sensor, or to connector attached to sensor.

• For MDI with ying leads: Connect the leads to terminal strip in junction box or on sensor.

• Ensure MDI enclosure is properly connected to Earth Ground.

For MDI Controlling Single IS Sensor with Passive Control Equipment:

• Connect MDI to sensor, using instructions above.

• Connect MDI to Approved IS Barrier using methods outlined above.

• Last, connect Passive Control Equipment to Approved IS Barrier.

• Ensure MDI enclosure is properly connected to Earth Ground.

Use care in selecting externally connected equipment to ensure that circuits are appropriately isolated from

hazardous live potentials (SELV or PELV), as specied in CAN/CSA C22.2 No. 61010-1.

• Software Installation

• Download the APG Modbus software ziple from http://apgsensors.com/support.

• Open the zip le.

• Choose “Install” from the options at the top of the zip le window.

• The installation process will prompt you as needed to complete the installation.

• The software will create APG_Modbus.exe which will run from a folder in your start menu titled “APG/

APG_Modbus”.

IMPORTANT: The MDI MUST be removed from hazardous location prior to program-



ming via APG Modbus. See Chapter 4 for programming instructions.

• Removal Instructions

• Ensure any external connections to or from the MDI are de-energized.

• Disconnect wires or connector on cable to MDI.

• Remove the MDI and store it in a dry place, at a temperature between -49° F and 194° F.

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Chapter 3: User Interface and Access Modes

• User Interface

External

Decrease/Power

Button

Battery Meter

Increase Button

Decrease/Power Button

Scalable Bar Graph

Units Label/Sensor Label

Enter Button

Figure 3.1

The operation of the MDI’s three buttons depends on whether the MDI is in normal operations or you are
navigating the MDI Setup Menus.

During MDI operation

Increase Button:

Cycles through sensor readings for multiple display conguration. (See Number of Sensors, page 24)

Decrease/Power Button:
Press to enter the Main Menu.

Press and hold for 1 second to power MDI on or o.

Enter Button:
Cycle between readings selected in ENTR menu. (See page 14)

Within MDI Menus

Increase Button:
Cycle upward through menu, or increase blinking value.
Decrease/Power Button:
Cycle downward through menu, or decrease blinking value.
Enter Button:
Press to enter selected menu, or accept blinking value.

DANGER: DO NOT OPEN ENCLOSURE WHEN EXPLOSIVE ATMOSPHERE IS PRESENT;

AVERTISSEMENT -- NE PAS OUVRIR LE BOÎTIER EN PRESENCE D’UNE ATMOSPHÈRE EXPLOSIVE.

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• MDI Setup Menus

T1TYPE

T1REAd

T1 WIN

EXIT

dEC PL

MASK

SHIFT

MLTPLR

bAR 0

bAR100

OVR-Ld

bAT EN

bATFUL

bATLOW

EXIT

MAXMIN

TEMP C

TEMP F

2 REAd

2Rd 1C

2Rd 1F

CU FT

MCU FT

GALLON

CU M

LITERS

CU IN

bARREL

PCTFUL

CUSTOM

OUTPUT

AdVSETAUTO

DISPLAYED VALUE

Main Menu

ENTR

UNITS

Main Menu

54321

GALLON

COMM

SENLAb

Main Menu

PCTFUL

bLIGHT

bAUd R

PARITY

STOPbT

C TYPE

SENAdR

NUMSEN

REGNUM

FUNCTN

REGTYP

SCANRT

WRITE

AdRCHG

EXIT

SEN 1

SEN 2

SEN 3

SEN 4

SEN 5

SEN 6

SEN 7

SEN 8

SEN 9

SEN 10

LOERST

EXIT

SEN 1

SEN 2

SEN 3

SEN 4

SEN 5

SEN 6

SEN 7

SEN 8

SEN 9

SEN 10

LOERST

EXIT

MOdE

bRTNES

EXIT

EXIT

Main Menu

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• Accessing Mode Options

The MDI has several Operating Modes which will limit or lock access to the setup menus. To access the
Operating Mode setting, follow the steps below.

1. Simultaneously press and hold the Decrease button and the Enter button for approximately 5

seconds to bring up the 3-digit Mode Access Number.

2. Use the Increase/Decrease buttons to change the value of the ashing digit, and Enter button to

accept the value and advance to the next digit.

 NOTE: If a Mode Access Password has been set for your MDI, it must be entered be-

fore the Mode can be changed. To set the Mode Access Password, see “Sensor 10 Label”
on page 26.

The mode options are as follows:

Mode Description
000 Full Access. All menu options are accessible, including those that may not be applicable to

all MDI congurations.

001 Locks access to all setup menus. The Increase Button will scroll through sensor readings

when the MDI is congured for multiple sensors. The Decrease/Power Button will turn on/
o the display. The Enter button will scroll between the maximum, minimum and the current

reading.

002 Hides the Output menu. All other setup menus are accessible.

005 All menus are hidden and all buttons are locked, except the Decrease / Power button, which

will power on/o the MDI.

125 Reset to factory standard defaults

200 Test all segments of LCD

DANGER: DO NOT OPEN ENCLOSURE WHEN EXPLOSIVE ATMOSPHERE IS PRESENT;

AVERTISSEMENT -- NE PAS OUVRIR LE BOÎTIER EN PRESENCE D’UNE ATMOSPHÈRE EXPLOSIVE.

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Chapter 4: Modbus Programming Notes

• Modbus Programming

MDI Instrinsically Safe Modbus Network Display and Controllers use standard Modbus RTU protocol (RS-

485). MDIs operate as controllers of a single IS sensor when installed in a Hazardous Area. APG’s Modbus

devices’ default transmission settings are 9600 Baud, 8 Bits, 1 Stop Bit, No Parity. Since the MDI does not
actively poll the full register contents of slave sensors, transmission times are not controlled to the same
extent that transmission times for other sensors are.

See Appendix D for a full list of MDI Modbus Registers.

 NOTE: For more information about Modbus RTU, please visit www.modbus.org.

• Modbus Programming via Internet

Unlike several other APG Modbus devices, the MDI is not programmable via Internet or local Ethernet.

• Modbus Programming with RST-6001 and APG Modbus Software

The MDI cannot be connected to a PC running APG Modbus software while it is installed in a hazardous
area.

To use a PC running APG Modbus software to setup or program an MDI:

1. If the unit is installed in a hazardous location, remove it from service. (See Chapter 2 for removal in­structions.).

2. Remove enclosure lid.

3. Use buttons to navigate to the COMM menu and set the MDI C TYPE to Setup.

4. Connect MDI to RST-6001 (See Wiring Diagram For RST-6001 Programming on page 4).

5. Initiate APG Modbus software. Choose “MND” from the Sensor Type drop down menu on the Commu-

nication Conguration screen.

6. Use APG Modbus software to manage MDI settings as desired.

7. Disconnect MDI from RST-6001.

8. Use buttons to navigate to COMM menu and set the MDI C TYPE to Master.

9. Replace enclosure lid.

10. Install/reinstall MDI per instructions in Chapter 2.

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