Minebea Intec PR1625/60 User manual

Minebea Intec GmbH, Meiendorfer Str. 205 A, 22145 Hamburg, Germany
Phone: [phone] Fax: [phone]
Instrument Manual
Gerätehandbuch
Manuel d’appareil
Intrinsically Safe Input/Output Interface
PR1625/60
Instrument Manual
Gerätehandbuch
Manuel d’appareil
9499 050 62513 Edition 5 01/08/2018

Please note
In any correspondence concerning this instrument, please always quote the type number and serial
number as given on the type plate.
Important
As the instrument is an electrical apparatus, it may be operated only by trained personnel.
Maintenance and repairs may only be carried out by qualified personnel.
Bitte beachten
Bei Schriftwechsel über dieses Gerät wird gebeten, die Typennummer und die Seriennummer
anzugeben. Diese befinden sich auf dem Typenschild.
Wichtig
Da das Gerät ein elektrisches Betriebsmittel ist, darf die Bedienung nur durch eingewiesenes Personal
erfolgen. Wartung und Reparatur dürfen nur von geschultem, fach- und sachkundigem Personal
durchgeführt werden.
Noter s.v.p.
Dans votre correspondance et dans vos réclamations se rapportant à cet appareil, veuillez toujours
indiquer le numéro de type et le numéro de série inscrits sur l’étiquette de l’appareil.
Important
Comme il s’agit d’un équipement électrique, la maintenance doit être effectuée par du personnel
qualifié. De même, l’entretien et les réparations sont à confier au personnel qualifié.

Minebea Intec GmbH, Meiendorfer Str. 205 A, 22145 Hamburg, Germany
Phone: [phone] Fax: [phone]
Instrument Manual
Intrinsically Safe Input/Output Interface
PR1625/60
Instrument Manual
9499 050 626513
Edition 5
01/08/2018

Please note
In any correspondence concerning this instrument, please always quote the type number and serial
number as given on the type plate.
Important
As the instrument is an electrical apparatus, it may be operated only by trained personnel.
Maintenance and repairs may only be carried out by qualified personnel.
Bitte beachten
Bei Schriftwechsel über dieses Gerät wird gebeten, die Typennummer und die Seriennummer
anzugeben. Diese befinden sich auf dem Typenschild.
Wichtig
Da das Gerät ein elektrisches Betriebsmittel ist, darf die Bedienung nur durch eingewiesenes Personal
erfolgen. Wartung und Reparatur dürfen nur von geschultem, fach- und sachkundigem Personal
durchgeführt werden.
Noter s.v.p.
Dans votre correspondance et dans vos réclamations se rapportant à cet appareil, veuillez toujours
indiquer le numéro de type et le numéro de série inscrits sur l’étiquette de l’appareil.
Important
Comme il s’agit d’un équipement électrique, la maintenance doit être effectuée par du personnel
qualifié. De même, l’entretien et les réparations sont à confier au personnel qualifié.

Instrument Manual PR1625/60
Minebea Intec EN-3
List of Contents
1Description...................................................................................................................................................5
2Safety Instructions.....................................................................................................................................7
2.1 Intended Use...........................................................................................................................................................7
2.2 Explosion Protection............................................................................................................................................7
2.3 Initial Inspection....................................................................................................................................................7
2.4 Before Commissioning ........................................................................................................................................8
2.5 Maintenance and Repair ....................................................................................................................................8
2.5.1 Failure and Excessive Stress..........................................................................................................................................8
2.5.2 Static Sensitive Components........................................................................................................................................8
2.5.3 Fuses ....................................................................................................................................................................................8
3Technical Data.............................................................................................................................................9
3.1 Performance Characteristics and Specifications........................................................................................9
3.2 General Data...........................................................................................................................................................9
3.3 Supply .......................................................................................................................................................................9
3.4 Interface to the Hazardous (Ex) Area.......................................................................................................... 10
3.4.1 Supply voltage output .................................................................................................................................................10
3.4.2 Bidirectional serial interface (RX/TX) .......................................................................................................................10
3.4.3 Digital input TXE (transmit enable)..........................................................................................................................10
3.4.4 Digital inputs (IN1/IN2)................................................................................................................................................10
3.5 Interface to the Safe Area .............................................................................................................................. 11
3.5.1 Bidirectional serial interface (RX/TX) .......................................................................................................................11
3.5.2 Digital Outputs (OUT1/OUT2).....................................................................................................................................11
3.6 Enviromental Conditions................................................................................................................................. 12
3.7 Electromagentic Compatibility...................................................................................................................... 13
3.8 Dimensions and Weights................................................................................................................................. 13
3.9 Approvals .............................................................................................................................................................. 13
3.10 Accessories (included in delivery)................................................................................................................. 13
4Mounting and Connections...................................................................................................................14
4.1 Mounting.............................................................................................................................................................. 14
4.2 Connections ......................................................................................................................................................... 15
4.2.1 Potential Equalization..................................................................................................................................................16
4.2.2 Terminal Allocation.......................................................................................................................................................17

PR1625/60 Instrument Manual
EN-4 Minebea Intec
5Settings.......................................................................................................................................................18
5.1 Opening the instrument ..................................................................................................................................18
5.2 Settings at the Side of the Instrument to the Save Area....................................................................19
5.2.1 Interface Cards PR1601/00, PR1602/00 and PR1604/00...................................................................................19
5.2.2 Active/Passive Mode of the Digital Outputs (OUT1/OUT2)................................................................................21
5.3 Settings at the Side of the Instrument to the Ex Area......................................................................... 21
5.3.1 Active/Passive Mode of the Serial Interface (RX/TX) and Digital Inputs (IN1/IN2/TXE)............................21
6Maintenance..............................................................................................................................................23
6.1 General...................................................................................................................................................................23
7Figures/Interconnection example ........................................................................................................23
7.1 Schematic Diagram ...........................................................................................................................................23
7.2 Connection Example 1......................................................................................................................................24
7.3Connection Example 2......................................................................................................................................25
7.4 Connection Example of Interfaces PR1601/10, PR1602/10 and PR1604/10 ................................26
8Certificates.................................................................................................................................................27

Instrument Manual PR1625/60
Minebea Intec EN-5
1Description
The PR1625/60 is a unit to intrinsically safe interface electrical equipment situated in a hazardous (Ex) area
with electrical equipment situated in a safe area.
It is classified to be an associated apparatus (with intrinsically safe circuits) and complies with class
[EEx ib] IIB or [EEx ib] IIC. The Certificate of Conformity is to be found under chapter 8.
The instrument can be used for weighing applications as well as for all other applications which require this
kind of intrinsically safe interfacing.
The instrument safeguards, that even in the event of a defective circuit, there is no electrical energy
transfered to the hazardous (Ex) area which exceeds the permissible limits.
This is realized by the use of
-special optocouplers for serial and digital in- outputs, and
-special circuits with zener diodes and transistors for voltage and current limiting in the power supply
section.
The unit provides the intrinsically safe interfacing of:
-Supply voltage output 12 V DC/≤120 mA for the supply of peripheral equipment in the Ex-area.
-Bidirectional serial interface with current loop interface to the Ex area and alternatively RS-232 or
RS-422/485 or 20 mA current loop in the save area.
-One digital control signal TXE (transmit enable) for the serial interface from the Ex area, if the serial
interface at the side to the safe area is connected to a bus system.
-Two digital control signals from the Ex area to the safe area.
At the side to the safe area the serial interface and the digital inputs can be supplied
-either by the intrinsically safe power supply 12 V DC of the PR 1625/60,
-or by an external intrinsically safe power supply unit.
When using an external intrinsically safe power supply unit, all interfaces at the side to the Ex area have to
be supplied externally.
Caution!
Mixing of internal and external supply is strictly forbidden.
Please observe, when supplying all interfaces to the Ex area by the PR 1625/60 internal power
supply 12 V DC, only approx. 50 mA will remain for the supply voltage output itself.
The housing of the PR1625/60 contains provisions for wall or rail mounting according to DIN EN 50022.
The interface can be supplied by either 24 V DC or AC power supply.
Connections are to be made via screw terminals up to 4mm2.
Terminal PE must be connected to the potential equalization system, which has to be installed and earthed
according to VDE 0100 and its part 540, or/and acc. to respective local regulations.

PR1625/60 Instrument Manual
EN-6 Minebea Intec
Depending on the chosen interface card, one of the following enclosed stickers has to be placed on the lid
with terminal descriptions above the black coloured block.
Stickers
for PR1625/60 with PR1601
for PR1625/60 with PR1602
for PR1625/60 with PR1604
Schematic Diagram

Instrument Manual PR1625/60
Minebea Intec EN-7
2Safety Instructions
2.1 Intended Use
The PR1625/60 is an instrument to intrinsically safe interface electrical equipment situated in a
hazardous (Ex) area with electrical equipment situated in a safe area.
The instrument reflects the state of the art. The manufacturer does not accept any liability for damage
caused by other system components or due to incorrect use of the product.
Commissioning and maintenance may be done only by qualified or trained personnel who know the related
risks and avoid them, or take measures to protect themselves.
2.2 Explosion Protection
The instrument fulfils the basic requirements of EN 50014 and EN 50020.
It complies with the requirements for ignition protection class II (2) G [EEx ib] II B or II (2) G [EEx ib] II C
and has the type approval certificate number PTB 02 ATEX 2056.
This approval number is printed on one side of the instrument. A copy of the approval can be looked up in
chapter 8 of this manual.
This instrument has been supplied in a safe condition.
The following important information and warnings must be followed by the user in order to ensure a safe
operation and to maintain the instrument in a safe condition.
2.3 Initial Inspection
Check the contents of the shipment for completeness and note whether any damage has occurred during
transport. If the contents are incomplete, or there is damage, a claim should be filed with the carrier
immediately, and the local organisation of Minebea Intec should be notified in order to facilitate the repair
or replacement of the instrument.

PR1625/60 Instrument Manual
EN-8 Minebea Intec
2.4 Before Commissioning
Before putting the instrument into operation after storage or transport, visually check it for physical
damage.
Mounting, installation, and earthing
Mounting, installation, earthing and interconnection of the instrument must always comply with the
requirements stated in the Certificate of Conformity.
Over and above this, it has to comply with the local national rules for the installation of electrical systems
in hazardous areas (in Germany e.g. acc. to VDE 0165).
For installation and connection refer to chapter 4, to the application drawings of this manual, and observe
the required environmental conditions as stated in the technical data, chapter 3.
Caution!
Terminal PE must be connected to the potential equalization system.
Before actual commissioning, the system has to be tested by a person who is authorized by the local
authority to perform such a test.
2.5 Maintenance and Repair
Repairs can only be carried out by Minebea Intec and are subject to checking. In case of defect or
functional trouble, please, contact your local Minebea Intec organization for repair. When returning the
instrument for repair, an exact and complete fault description must be supplied with the defective
instrument.
Maintenance work must be carried out only by a trained technician aware of the involved hazards, whereby
the relevant precautions must be taken in account.
2.5.1 Failure and Excessive Stress
If the instrument is suspected of being unsafe, take it out of operation permanently and make sure, that it
cannot be used.
This is the case when the instrument
-shows physical damage
-does not function anymore
-is stressed beyond the tolerable limits (e.g. during storage and transportation)
2.5.2 Static Sensitive Components
This instrument contains electro-statically sensitive components. Therefore, potential equalization must be
provided when working at the instrument (antistatic protection).
2.5.3 Fuses
The replacing of fuses is not allowed!

Instrument Manual PR1625/60
Minebea Intec EN-9
3Technical Data
3.1 Performance Characteristics and Specifications
The following characteristics are valid after a warm-up time of at least 30 minutes
(reference temperature: 23°C).
3.2 General Data
Type PR1625/60
Order number 9405 316 25601
Connection save area (black) via 4mm
2
screw terminals
Connection for the Ex area (blue) via 4mm
2
screw terminals
3.3 Supply
Earth connection via 4mm
2
screw terminal PE
(see also chapter 2.4 and 4.2.1)
Nominal voltage by either 24 V DC, or 24 V AC
Tolerance range DC = 18…33 V, AC = 18…28 V
Power consumption 6.7 W; 11 VA at 24 V
Frequency 50/60 Hz, ±2 Hz
Electrical safety Class I, acc. to IEC 348, and/or VDE 100 part 410 and VDE 804

PR1625/60 Instrument Manual
EN-10 Minebea Intec
3.4 Interface to the Hazardous (Ex) Area
A blue coloured block with 15 screw terminals is provided for all connections to the Ex area.
3.4.1 Supply voltage output
Voltage 12 V DC stabilized
RLmin 100 ¥
Max. current
≤
150 mA
3.4.2 Bidirectional serial interface (RX/TX)
Type 20 mA current loop
Current level Logic „0“ = 18…22 mA
Logic „1“ = 0…1 mA
Max. voltage drop 5 V
Supply See chapter 5.3.1
Baud rate 300…9600 Baud
3.4.3 Digital input TXE (transmit enable)
Type Logic input, galvanically separated
Voltage level
Logic „0“ = 0…6.0 V
Logic „1“ = 9…12.6 V
Max. current 16 mA at 12.0 V
Supply See chapter 5.3.1
3.4.4 Digital inputs (IN1/IN2)
Art Logic input, galvanically separated
Voltage level
Logic „0“ = 0…6.0 V
Logic „1“ = 9…12.6 V
Max. current 16 mA at 12.0 V
Supply See chapter 5.3.1

Instrument Manual PR1625/60
Minebea Intec EN-11
3.5 Interface to the Safe Area
A black coloured block with 15 screw terminals is provided for all connections in the safe area.
3.5.1 Bidirectional serial interface (RX/TX)
Type Depends on the inserted interface card:
PR1601/00 Interface TTY
PR1602/00 Interface RS-232
PR1604/00 Interface RS-422/485
Supply For PR1601 optionally used:
-Active: PR1625/60 internal supply
-Passive: interface of the connecting instrument is
active.
Baud rate
PR1601/00 = 300…4800 Baud
PR1602/00 = 300…9600 Baud
PR1604/00 = 300…9600 Baud
3.5.2 Digital Outputs (OUT1/OUT2)
Type Logic input, galvanically separated
Nominal value of the current limitation 20 mA
Current level LOW Logic „0“ = 0…1 mA
HIGH Logic „1“ = 18…22 mA
Max. voltage drop 5 V
Supply selectable:
-Active: PR1625/60 internal supply approx. 10 V DC
-Passive: interface of the connecting instrument is
active (U = 12…31 V DC).

PR1625/60 Instrument Manual
EN-12 Minebea Intec
3.6 Enviromental Conditions
The following environmental data are valid only if the instrument is checked in accordance with the official
checking procedure. Details of these procedures and failure criteria are supplied on request from the local
organization of Minebea Intec.
Ambient temperature
Reference value +23 °C
Nominal operating temperature range -10 °C…+55 °C
0 °C…+40 °C (for 3000 e)
Limit range for storage and transport
-40 °C…+70 °C
Relative humidity no condensation
Reference range
45...75 %
Nominal operational range 20...80 %
Operational limits 10...90 %
Limit range for storage and transport 5...95 %
Warming-up time approx. 30 min
Mounting position Any. The instrument is designed for either wall or rail
mounting (35 mm, acc. DIN 46277 and 50022).
Electrical safety
Class I, acc. to IEC 348, and/or VDE 100 part 410,
and VDE 804
Protection class
acc. to IP 20 (DIN 40050)
Housing Lower part Makrolon 8020,
upper (connection) part Makrolon 2800.
Interference voltage acc. VfG 1064; Amtsblatt Nr. 163/1984 (VDE 0871, limit
value class B)

Instrument Manual PR1625/60
Minebea Intec EN-13
3.7 Electromagentic Compatibility
Static discharges acc. IEC 801-2, level 3 (8 kV with 5 mJ)
Magnetic fields 60 A/m at 50 Hz
Mains voltage sags 100 % with 10 ms
50 % with 20 ms
20 % with 50 ms
Resistance to irradiation
Electrical fields 100 kHz...500 MHz at 10 V/m,
500 MHz...1 GHz at 1 V/m.
High energy interference on mains supply:
Amplitude
±
2000 V
Rise time 100 ns
Duration 10 µs
Transients to power inputs, acc. to IEC 801-4:
Amplitude
±
2000 V
Rise time 5 ns
Duration 50 ns
Transients to data lines, acc. to IEC 801-4:
Amplitude
±
1000 V
Rise time 5 ns
Duration
50 ns
3.8 Dimensions and Weights
Dimensions
H =
L =
B =
see chapter 4.1
75 mm
110 mm
100 mm
Weights
net =
gross =
approx. 500 g
approx. 550 g
3.9 Approvals
Ex approval Zone 1 II (2) G [EEx ib] IIB bzw. II (2) G [EEx ib] IIC
PTB 02 ATEX 2055
Note: See chapter 8 too.
3.10 Accessories (included in delivery)
Stickers
The inscriptions of the terminals for the interfaces see chapter 1 and 4.2.2.

PR1625/60 Instrument Manual
EN-14 Minebea Intec
4Mounting and Connections
4.1 Mounting
The instrument is suitable for mounting in any position. Before mounting, the instructions in chapter 2.4
have to be observed. It can
-either be mounted by means of two screws (acc. to DIN 46121 and 43660),
-or be fixed to a 35 mm rail (acc. to DIN 46277 and 50022).

Instrument Manual PR1625/60
Minebea Intec EN-15
4.2 Connections
-Screw terminals of the blue coloured block are provided for the connections to the Ex area.
-Screw terminals of the black coloured block are provided for the connections in the safe area.
-Screw terminals for interfacing and terminal PE are provided for 4mm2at maximum.
-The screens of the cables are to be connected on the shortest way to the respective screw terminals.
Caution!
In intrinsically safe lines with a cable length of ≥50 m, the screen of the cables
may only be connected at one end to the potential equalization line (see sketch
below).
To avoid any danger in the event of wires becoming loose and moving into the intrinsically safe connection
area of the module causing short circuiting, all wires of the safe side have to be secured together in a cable
harness.

PR1625/60 Instrument Manual
EN-16 Minebea Intec
4.2.1 Potential Equalization
According to VDE 0165/6.80, potential equalization is to be ensured within an intrinsically safe installation,
especially in hazardous areas of zone 0 and 1. Otherwise impermissible sparking can occur between the
particular conducting parts.
Therefore terminal PE of the PR1626/60 must be connected to the potential equalization system, which has
to be installed and earthed according to VDE 0100 and its part 540, or/and acc. to respective local
regulations.
Pos. Component Cross-section
(1) Conductor for additional potential equalization ≥4.0 mm² Cu
(2) Conductor for potential equalization ≥6.0 mm² Cu
(3) Conductor for potential equalization ≥10.0 mm² Cu
(4) Main conductor for potential equalization ≥10.0 mm² Cu
(5) Earthing conductor
≥
10.0 mm² Cu
(6) Load cell by-pass
≥
10.0 mm² Cu
(A) Sub potential equalization terminal
(B) Main potential equalization terminal
(E) To earth electrode

Instrument Manual PR1625/60
Minebea Intec EN-17
4.2.2 Terminal Allocation
The definition of the terminals for the serial interface to the safe area depends on the selected interface
card.
For this, corresponding stickers are provided in the delivery scope of the PR 1625/60, which have to be
placed accordingly above the intended terminal clamps (black coloured block).
for PR1625/60 with PR1601
for PR1625/60 with PR1602
for PR1625/60 with PR1604

PR1625/60 Instrument Manual
EN-18 Minebea Intec
5Settings
Danger!
Opening and setting of the instrument may only be done after having switched-off the
supply voltage, and by observing the instructions as given in chapter 2.
5.1 Opening the instrument
Note: Upon delivery from the factory the instrument is not completely closed. Sliding of the
electronic part (1) into the housing will be prevented by a small sponge.
Changes of the solder links can be done on the interface card (PCB 2)
(see chapter 5.3.1).
After setting the instrument the small sponge has to be removed.
The instrument must be opened carefully by spreading out slightly the side parts of the housing (2),
without breaking them. This can be done by using e.g. a small screwdriver. As soon as the little plastic noses
become released pull out the electronic part (1).
After opening, the power supply card (PCB 1), and the interface card (PCB 2) become visible.
Both cards are fixed to each other by means of 3 bolts and interconnected via flat cable connection.