Minebea Intec PR 1626/60 User manual

Intrinsically safe load Cell interfaces PR 1626/60, ../61
Instrument Manual
Translation of the original instrument manual 9499 050 62600 Edition 4.2.0 08/23/2019
Minebea Intec GmbH, Meiendorfer Str. 205 A, 22145 Hamburg, Germany
Phone: [phone] Fax: [phone]

Foreword
Must be followed!
Any information in this document is subject to change without notice and does not represent a commitment on
the part of Minebea Intec unless legally prescribed. This product should be operated/installed only by trained
and qualied personnel. In correspondence concerning this product, the type, name, and release number/serial
number as well as all license numbers relating to the product have to be cited.
Note
This document is partially protected by copyright. It may not be changed or copied, and it may not be used
without purchasing or written permission from the copyright owner (Minebea Intec). The use of this product
constitutes acceptance by you of the above-mentioned provisions.

Table of contents
1 Introduction......................................................................................................................................... 3
1.1 Read the manual.........................................................................................................................................................3
1.2 This is what operating instructions look like..........................................................................................................3
1.3 This is what lists look like...........................................................................................................................................3
1.4 This is what menu items and softkeys look like.....................................................................................................3
1.5 This is what the safety instructions look like.......................................................................................................... 3
1.6 Hotline..........................................................................................................................................................................4
2 Safety instructions...............................................................................................................................5
2.1 General notes..............................................................................................................................................................5
2.2 Intended use................................................................................................................................................................5
2.3 Initial inspection..........................................................................................................................................................5
2.4 Before operational startup........................................................................................................................................5
2.5 Repairs and maintenance..........................................................................................................................................6
2.5.1 General information ........................................................................................................................................6
2.5.2 Failure and excessive stress...........................................................................................................................6
2.5.3 Electrostatically sensitive parts .....................................................................................................................6
2.5.4 Replacing fuses................................................................................................................................................6
3 Device Description ...............................................................................................................................7
4 Equipment supplied.............................................................................................................................9
5 Installation......................................................................................................................................... 10
5.1 Mounting ................................................................................................................................................................... 10
5.2 Connections................................................................................................................................................................ 11
5.2.1 Potential equalization....................................................................................................................................13
6 Maintenance/repairs ..........................................................................................................................15
6.1 Maintenance...............................................................................................................................................................15
6.2 Repairs.........................................................................................................................................................................15
7 Disposal ............................................................................................................................................. 16
8 Technical data.....................................................................................................................................17
8.1 General data...............................................................................................................................................................17
8.2 Supply voltage ...........................................................................................................................................................17
8.3 Interface to Ex area ...................................................................................................................................................17
8.3.1 Load Cell Supply (Excitation).........................................................................................................................17
8.3.2 Measuring voltage input (from the Load Cells)......................................................................................... 18
8.3.3 Sense voltage input (from the Load Cells) ................................................................................................. 18
8.4 Interface to secure area........................................................................................................................................... 18
8.4.1 Measuring Voltage Output (to the Instrument)........................................................................................ 18
Intrinsically safe load Cell interfaces PR 1626/60, ../61 Table of contents
Minebea Intec EN-1

8.4.2 Sense Voltage Output (to the Instrument)................................................................................................. 18
8.5 Ambient conditions.................................................................................................................................................. 18
8.6 Electromagnetic Compatibility (EMC) ................................................................................................................... 19
8.7 Dimensions and Weights.........................................................................................................................................20
8.8 Possible marking for the Ex area............................................................................................................................20
8.9 Documentation on the CD included ......................................................................................................................20
9 Appendix ............................................................................................................................................21
9.1 Certicates..................................................................................................................................................................21
Intrinsically safe load Cell interfaces PR 1626/60, ../61 Table of contents
EN-2 Minebea Intec

1 Introduction
1.1 Read the manual
-Please read this manual carefully and completely before using the product.
-This manual is part of the product. Keep it in a safe and easily accessible location.
1.2 This is what operating instructions look like
1. - n. are placed before steps that must be done in sequence.
1.3 This is what lists look like
-indicates an item in a list.
1.4 This is what menu items and softkeys look like
[ ] frame menu items and softkeys.
Example:
[Start]- [Applications]- [Excel]
1.5 This is what the safety instructions look like
Signal words indicate the severity of the danger involved when measures for preventing
hazards are not followed.
DANGER
Warning of personal injury
DANGER indicates death or severe, irreversible personal injury which will occur if the
corresponding safety measures are not observed.
Take the corresponding safety precautions.
WARNING
Warning of hazardous area and/or personal injury
WARNING indicates that death or severe, irreversible injury may occur if appropriate
safety measures are not observed.
Take the corresponding safety precautions.
CAUTION
Warning of personal injury.
CAUTION indicates that minor, reversible injury may occur if appropriate safety
measures are not observed.
Take the corresponding safety precautions.
is placed before a step.
describes the result of a step.
1 Introduction Intrinsically safe load Cell interfaces PR 1626/60, ../61
Minebea Intec EN-3

NOTICE
Warning of damage to property and/or the environment.
NOTICE indicates that damage to property and/or the environment may occur if
appropriate safety measures are not observed.
Take the corresponding safety precautions.
Note:
User tips, useful information, and notes.
1.6 Hotline
Phone: [phone]
Fax: [phone]
eMail: [email protected]
Intrinsically safe load Cell interfaces PR 1626/60, ../61 1 Introduction
EN-4 Minebea Intec

2 Safety instructions
2.1 General notes
NOTICE
Warning of damage to property and/or the environment.
The product was in perfect condition with regard to safety features when it left the
factory.
To maintain this condition and to ensure safe operation, the user must follow the
instructions and observe the warnings in this manual.
2.2 Intended use
The device PR 1626/60, ../61 is intended for the intrinsically safe separation of electrical
devices which are located in an area prone to explosions and electrical devices located in
a secure area.
Product operation, commissioning and maintenance must be performed by trained and
qualied personnel who are aware of and able to deal with the related hazards and take
suitable measures for self-protection.
The device reects the state of the art.
No warranty is given that the product is free of faults, especially not in conjunction with
third-party software and hardware components required for operation.
The manufacturer does not accept any liability for damage caused by third-party system
components or due to incorrect use of the product. The use of this product signies
recognition of the stipulations listed above.
2.3 Initial inspection
Check the contents of the consignment for completeness, see Chapter 4. Check the
contents visually to determine whether any damage has occurred during transport. If
there are grounds for rejection of the goods, a claim must be led with the carrier
immediately. The Minebea Intec sales or service organization must also be notied.
2.4 Before operational startup
NOTICE
Perform visual inspection.
Before operational startup as well as after storage or transport, inspect the device
visually for signs of mechanical damage.
Before operational startup, acceptance of the installation by an authorized expert is
compulsory.
Mounting, installation, and earthing
When installing and assembling the device, the information in the EU type examination
certicate and the respective national regulations for the installation of electrical systems
in potentially explosive atmospheres must always be observed (in Germany in accordance
with VDE 0165, for example).
2 Safety instructions Intrinsically safe load Cell interfaces PR 1626/60, ../61
Minebea Intec EN-5

For installation and connection refer to chapter 5, to the application information of this
manual, and observe the required environmental conditions as stated in the technical
data, chapter 8.
Note:
The PR 1626/60, ../61 terminal must be connected to the potential equalization
system.
2.5 Repairs and maintenance
2.5.1 General information
Repairs are subject to inspection and must be carried out at Minebea Intec.
In case of defect or malfunction, please contact your local Minebea Intec dealer or service
center for repair.
When returning the device for repair, please include a precise and complete description of
the problem.
Maintenance work may only be carried out by a trained technician with expert knowledge
of the hazards involved and the required precautions.
National laws and directives must be observed, in particular EN 60079-14/-17/-25.
2.5.2 Failure and excessive stress
If there is any reason to assume that safe operation of the device is no longer ensured,
shut it down and make sure it cannot be used.
Safe operation is no longer ensured if any of the following is true:
-The device is physically damaged.
-The device does not function.
-The device has been subjected to stresses beyond the tolerance limits (e.g.,during
storage or transport).
2.5.3 Electrostatically sensitive parts
This device contains electro-statically sensitive components. Therefore, potential
equalization must be provided when working on the device (antistatic protection).
2.5.4 Replacing fuses
The replacement of fuses is not permitted!
Intrinsically safe load Cell interfaces PR 1626/60, ../61 2 Safety instructions
EN-6 Minebea Intec

3 Device Description
The device is used for intrinsically safe interface electrical equipment situated in a hazardous (Ex) area with
electrical equipment situated in a safe area.
The device is designed for weighing applications requiring intrinsically safe interfacing.
This is achieved by use of double provided current and voltage limiters in the supply
circuit and barriers in the measuring and sense circuits of the device.
Schematic diagram
①Ex area
②non Ex area (safe area)
③UDC = 24 V*
④Measuring signal*
⑤Sense signal*
⑥Load cell supply
* These signals may only be operated with a SELV power supply unit or an evaluation
unit with SELV supply.
The unit provides the intrinsically safe interfacing of:
-1 voltage output for the supply of e.g. load cells situated in a hazardous (Ex) area,
-1 measuring voltage input from the hazardous (Ex) area,
-1 sense voltage input from the hazardous (Ex) area.
This is achieved by use of double provided current and voltage limiters in the supply
circuit and barriers in the measuring and sense circuits of the device.
The device is available in 2 versions:
-PR 1626/60: UDC = 12 V (nominal)/80 mA
e.g. for the connection of 4 load cells of 650 Ω, connected in parallel (162.5 Ω)
3 Device Description Intrinsically safe load Cell interfaces PR 1626/60, ../61
Minebea Intec EN-7

-PR 1626/61: UDC = 7,5 V (nominal)/92 mA
e.g. for the connection of 8 load cells of 650 Ω, connected in parallel (81.3 Ω) or for
the connection of 4 load cells of 350 Ω, connected in parallel (87.5 Ω).
The housing of the PR 1626/60, ../61 contains provisions for wall or rail mounting
according to EN 60715.
It is supplied with UDC = 24 V.
Connections are to be made via terminal contacts up to 4 mm2.
The terminal must be connected to the potential equalization system, see
Chapter 5.2.1.
The ground connection is designed for lines of at least 4 mm2.
Intrinsically safe load Cell interfaces PR 1626/60, ../61 3 Device Description
EN-8 Minebea Intec

4 Equipment supplied
Ser. no. Description
1 Intrinsically Safe Load Cell Interface PR 1626/6x
2 Safety information for Ex instruments 9499 059 60091
3 Product CD (see Chapter 8.9)
4 Equipment supplied Intrinsically safe load Cell interfaces PR 1626/60, ../61
Minebea Intec EN-9

5 Installation
5.1 Mounting
Note:
The device is supplied already congured. It is not necessary to open the device.
Before mounting, the instructions in chapter 2.4 have to be observed. The instrument is
suitable for mounting in any position. It can
-either be mounted by means of two screws (acc. to DIN 46121 and 43660),
-or be xed to a 35 mm rail (acc. to EN 60715).
Dimensions
dimensions in mm (see also Chapter 8.7)
Intrinsically safe load Cell interfaces PR 1626/60, ../61 5 Installation
EN-10 Minebea Intec

5.2 Connections
-Terminal contacts located on the blue block are intended for connecting to the Ex
area.
-Terminal contacts located on the black block are intended for connecting to the
secure area.
-Terminal contacts, including the PE terminal, can be assigned wires up to a cross-
section of 4 mm2.
-The cable shielding must be connected to the appropriate terminals in the shortest
possible way.
Schematic Representation
12
3 4
5 6
PR1626/6x
①Ex area
②no ex area (secure area)
③Evaluation unit
④load cell/cable junction box
⑤Test voltage
between conductor + screen: UAC ≥2 kV
between screen + ground: UAC ≥500 V
⑥Test voltage for cable
For cable lengths ≥50 m between screen + ground: UAC ≥500 V
5 Installation Intrinsically safe load Cell interfaces PR 1626/60, ../61
Minebea Intec EN-11

Connection Example
* For a cable length of ≥50 m please refer to the schematic diagram.
①Ex area
②no ex area (secure area)
Intrinsically safe load Cell interfaces PR 1626/60, ../61 5 Installation
EN-12 Minebea Intec

③Screen
④Cable junction box
⑤External power supply SELV UDC = 24 V
⑥Indicator
⑦Potential equalization
5.2.1 Potential equalization
In order to avoid possible balancing currents between the individual conductive system
components, a potential equalization must be installed in potentially explosive areas.
The terminal must be connected to the potential equalization system and installed and
earthed in accordance with local regulations (see also schematic diagram).
Schematic diagram
(1)
(2) (1) (1) (2) (3)
(6) (6)
(A)
(4)
(4) (4)
(A) (A) (A) (A) (A) (A)
(E)
(5)
(B)
(1)(1)(1)(1)(1)
(A) (A) (A) (A)
1
2
4
3 3
①Ex area
②no ex area (secure area)
③Load cell
④Cable junction box
Pos. Component Cross-section
(1) Conductor for additional potential equalization ≥4.0 mm2Cu
(2) Potential equalization conductor ≥6.0 mm2Cu
(3) Potential equalization conductor ≥10.0 mm2Cu
(4) Main potential equalization conductor ≥10.0 mm2Cu
(5) Ground conductor ≥10.0 mm2Cu
(6) Load cell override ≥10.0 mm2Cu
5 Installation Intrinsically safe load Cell interfaces PR 1626/60, ../61
Minebea Intec EN-13

Pos. Component Cross-section
(A) Potential equalization terminal (rail)
(B) Main potential equalization rail
(E) Main earth (electrode)
Intrinsically safe load Cell interfaces PR 1626/60, ../61 5 Installation
EN-14 Minebea Intec

6 Maintenance/repairs
6.1 Maintenance
Maintenance work may only be carried out by a trained technician with expert knowledge
of the hazards involved and the required precautions.
National laws and directives must be observed, in particular EN 60079-14/-17/-25.
6.2 Repairs
Repairs are subject to inspection and must be carried out at Minebea Intec.
In case of defect or malfunction, please contact your local Minebea Intec dealer or service
center for repair.
When returning the device for repair, please include a precise and complete description of
the problem.
WARNING
Possible explosion due to improper replacement!
It is not permissible to change fuses in Ex devices!
6 Maintenance/repairs Intrinsically safe load Cell interfaces PR 1626/60, ../61
Minebea Intec EN-15

7 Disposal
If the packaging is no longer required, please take it to your local waste disposal facility
and/or a reputable disposal company or collection point. The packaging largely consists
of environmentally friendly materials which can be used as secondary raw materials.
It is not permitted—even for small businesses—to dispose of this product with the regular
household waste or at collection points run by local public waste disposal companies.
EU legislation requires its Member States to collect electrical and electronic equipment
and dispose of it separately from other unsorted municipal waste so that it can then be
recycled.
Before disposing of or scrapping the product, any batteries should be removed and taken
to a suitable collection point.
Please see our T&Cs for further information.
Service addresses for repairs are listed in the product information supplied with the
product and on our website (www.minebea-intec.com).
We reserve the right not to accept products that are contaminated with hazardous
substances (ABC contamination) for repair.
Should you have any further questions, please contact your local service representative or
our service center.
Minebea Intec GmbH
Repair center
Meiendorfer Strasse 205 A
22145 Hamburg, Germany
Phone: [phone]
[email protected]
Intrinsically safe load Cell interfaces PR 1626/60, ../61 7 Disposal
EN-16 Minebea Intec

8 Technical data
8.1 General data
The following characteristics are valid after a warm-up time of at least 30 minutes
(reference temperature: 23 °C).
Type PR 1626/60
PR 1626/61
Order number 9405 316 26601
9405 316 26611
Accuracy 3000 e according to OIML class III in conjuncti-
on with Minebea Intec weighing instruments of
type PR 5410/..
Connection save area (black) via 4 mm2terminal contacts
Connection for the Ex area (blue) via 4 mm2terminal contacts
8.2 Supply voltage
Connection to protective earth via the terminal (4 mm2)
(see also Chapter 2.4 and 5.2.1)
Rated voltage SELV UDC = 24 V
Tolerance range UDC = 18…30 V
Rated voltage Um_DC = 30 V
Power consumption 3.8 W; 6.6 VA at 24 V
8.3 Interface to Ex area
All connections to the Ex‑area are made via the 15‑pin blue terminal.
Connected loads for the Ex-area and standards can be found in the EU Type Examination
Certicate in chapter 9.1.
8.3.1 Load Cell Supply (Excitation)
PR 1626/60 PR 1626/61
Voltage UDC = ±6 V (nominal)/≤80 mA
symmetrically to ground UDC = ±3.75 V (nominal)/≤92 mA symmetrically to ground
Load cell input
impedance >150 Ω; this corresponds to e.g:
1× load cell with RLC = 350 Ω
4× load cell with RLC = 650 Ω
6× load cell with RLC = 1000 Ω
>80 Ω; this corresponds to e.g:
4× load cell with RLC = 350 Ω
6× load cell with RLC = 650 Ω
8× load cell with RLC = 1000 Ω
Symmetry ≤24 mV ≤24 mV
Tolerance range UDC = ±5.5 V… ±6.3 V UDC = ±3.25 V… ±3.95 V
8 Technical data Intrinsically safe load Cell interfaces PR 1626/60, ../61
Minebea Intec EN-17

PR 1626/60 PR 1626/61
Max. current ≤110 mA @ short circuit ≤110 mA @ short circuit
Tk +8 mV/K @ ±6 V +3 mV/K @ ±3.75 V
8.3.2 Measuring voltage input (from the Load Cells)
Vmeas. (max), max. voltage 37.2 mV (dierential)
8.3.3 Sense voltage input (from the Load Cells)
PR 1626/60 PR 1626/61
Vsense (max),
max. voltage ±6 V nominal
(with ref. to ground) ±3.75 V nominal (with ref. to ground)
8.4 Interface to secure area
All connections to the secure area are made via the 15‑pin black terminal.
8.4.1 Measuring Voltage Output (to the Instrument)
Vmeas. (max) 37.2 mV (dierential)
Tk0≤0.05 µV/K (@ 0 … +40 °C and 1 mV/V)
TKSpan ≤5 ppm/K (@ +23 °C, 30000 d and 1 mV/V)
8.4.2 Sense Voltage Output (to the Instrument)
PR 1626/60 PR 1626/61
Vsense (max),
max. voltage ±6 V nominal (with ref. to ground) ±3.75 V nominal (with ref. to
ground)
8.5 Ambient conditions
The following indicated data only apply if the device is inspected pursuant to the ocial
testing methods. Details regarding this method and the error limits can be requested
from the local Minebea Intec organization.
Ambient temperature
Reference value +23 °C
Rated operating range -10 °C … +50 °C
0 °C … +40 °C (for 3000 e)
Limits for storage and transport -40 °C … +70 °C
Relative humidity no condensation
Reference range 45 … 75 %
Rated operating range 20 … 80 %
Intrinsically safe load Cell interfaces PR 1626/60, ../61 8 Technical data
EN-18 Minebea Intec