DKS PD72S User manual

USER MANUAL for
meter with U/I input
type: PD72S
firmware version: 5.14 or higher
Read the user's manual carefully before starting to use the unit.
Producer reserves the right to implement changes without prior notice.
13.01.2009 V.2.02
Radeberger Straße 21 –D-01900 Großröhrsdorf
E-Mail: [e-mail]
Tel.: [phone]
WEB: https://www.dks-engineering.com

User manual for meter with U/I input PD72S
CONTENTS
1. BASIC REQUIREMENTS AND USER SAFETY....................................................................................... 3
2. GENERAL CHARACTERISTICS ............................................................................................................. 4
3. TECHNICAL DATA.................................................................................................................................. 4
4. DEVICE INSTALLATION ......................................................................................................................... 6
4.1. UNPACKING ................................................................................................................................. 6
4.2. ASSEMBLY ................................................................................................................................... 6
4.3. CONNECTION METHOD............................................................................................................... 8
4.4. MAINTENANCE........................................................................................................................... 14
5. FRONT PANEL DESCRIPTION............................................................................................................. 14
6. PRINCIPLE OF OPERATION..................................................................................................................15
6.1. MEASUREMENT MODE.............................................................................................................. 15
6.2. DETECTION OF THE PEAK VALUES..........................................................................................16
6.3. CONTROL OF THE RELAY OUTPUTS........................................................................................17
6.3.1. One threshold mode ........................................................................................................... 18
6.3.2. Two thresholds mode.......................................................................................................... 19
7. DEVICE PROGRAMMING...................................................................................................................... 20
7.1. PROGRAMMING MENU.............................................................................................................. 20
7.2. PARAMETERS EDITION.............................................................................................................21
7.2.1. Numeric parameters (digit change mode)........................................................................... 21
7.2.2. Numeric parameters (slide change mode) .......................................................................... 21
7.2.3. Switch parameters (“LIST” type) ......................................................................................... 22
7.3. MENU DESCRIPTION................................................................................................................. 22
7.3.1. “rEL1” menu........................................................................................................................ 23
7.3.2. “inPt” menu......................................................................................................................... 25
7.3.3. “bri” parameter.....................................................................................................................27
7.3.4. “CoL” menu..........................................................................................................................27
7.3.5. “HOLd” menu...................................................................................................................... 29
7.3.6. “SECu” menu...................................................................................................................... 29
7.3.7. “rS” menu ........................................................................................................................... 30
7.3.8. “Edit” parameter.................................................................................................................. 31
7.3.9. “dEFS” parameter...............................................................................................................31
7.3.10. “SErv” menu .....................................................................................................................31
7.4. MENU STRUCTURE ................................................................................................................... 32
8. THE ALARM LED .................................................................................................................................. 34
9. OVER-CURRENT PROTECTION........................................................................................................... 34
10. DISPLAYED VALUES CALCULATION................................................................................................ 34
10.1. ADDITIONAL CALCULATIONS (USED CONVERSION CHARACTERISTIC)............................ 34
10.1.1. Linear characteristic.......................................................................................................... 35
10.1.2. Square characteristic........................................................................................................ 35
10.1.3. Square root characteristic..................................................................................................36
10.1.4. User defined characteristic.................................................................................................36
10.2. EXAMPLES OF CALCULATIONS...............................................................................................37
11. THE MODBUS PROTOCOL HANDLING ............................................................................................. 39
11.1. LIST OF REGISTERS................................................................................................................ 40
11.2. TRANSMISSION ERRORS DESCRIPTION............................................................................... 43
11.3. EXAMPLES OF QUERY/ANSWER FRAMES............................................................................ 43
12. DEFAULT AND USER'S SETTINGS LIST............................................................................................46
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User manual for meter with U/I input PD72S
- In order to minimize fire or electric shock hazard, the unit must be protected
against atmospheric precipitation and excessive humidity.
- Do not use the unit in areas threatened with excessive shocks, vibrations, dust,
humidity, corrosive gasses and oils.
Explanation of symbols used in the manual:
- This symbol denotes especially important guidelines concerning the installation and
operation of the device. Not complying with the guidelines denoted by this symbol
may cause an accident, damage or equipment destruction.
IF THE DEVICE IS NOT USED ACCORDING TO THE MANUAL THE USER IS
RESPONSIBLE FOR POSSIBLE DAMAGES.
- This symbol denotes especially important characteristics of the
unit.
Read any information regarding this symbol carefully
1. BASIC REQUIREMENTS AND USER SAFETY
- The manufacturer is not responsible for any damages caused by
inappropriate installation, not maintaining the proper technical condition and
using the unit against its destination.
- Installation should be conducted by qualified personnel. During installation all
available safety requirements should be considered. The fitter is responsible for
executing the installation according to this manual, local safety and EMC
regulations.
- The unit must be properly set-up, according to the application. Incorrect
configuration can cause defective operation, which can lead to unit damage or an
accident.
- If in the case of a defect of unit operation there is a risk of a serious threat to
the safety of people or property additional, independent systems and
solutions to prevent such a threat must be used.
- The unit uses dangerous voltage that can cause a lethal accident. The unit
must be switched off and disconnected from the power supply prior to
starting installation of troubleshooting (in the case of malfunction).
- Neighbouring and mating equipment must meet the requirements of appropriate
standards and regulations concerning safety and be equipped with adequate anti-
overvoltage and anti-interference filters.
- Do not attempt to disassemble, repair or modify the unit yourself. The unit
has no user serviceable parts. Units, in which a defect was stated must be
disconnected and submitted for repairs at an authorized service centre.
3

User manual for meter with U/I input PD72S
The unit is designed for operation in an industrial environment and must not
be used in a household environment or similar.
2. GENERAL CHARACTERISTICS
The PD72S meter is equipped with one current input 0-20 / 4-20 mA and one voltage input 0-5
/ 1-5 / 0-10 / 2-10 V. Current input has additionally overcurrent protection circuit, which
protects standard resistor. The selection of active input is realised by software, and selected
input can be changed at any time. Additionally the PD72S allows user to select a conversion
characteristic of several kinds: linear, square, square root, and user defined (max.20 points
length). Result is showed on 4-digit LED display. Displayed values range can be selected by
user, from -999 to 9999, plus decimal point.
The device can be equipped with one or two relay (or OC type) outputs. Device PD72S is
equipped with RS-485 / Modbus RTU communication interface and sensor supply output. The
meter can be ordered in two power supply versions.
PD72S can be used for controlling and regulation of processes need proportional and
threshold control like: temperature processes (heating or cooling), valves controlling or other.
3. TECHNICAL DATA
Power supply voltage 85...230...260 VAC/DC; 50 ÷ 60 Hz
(depending on version) or 19...24...50 VDC; 16...24...35 VAC
External fuse (required) T - type, max. 2 A
Power consumption max. 4.5 VA @ 85 ÷ 260 VAC/DC
max. 4.5 VA @ 16 V ÷ 35 VAC
max. 4.5 W @ 19 V ÷ 50 VDC
Current input 0÷20 mA, 4÷20 mA overload protected,
maximum input current about 40 mA
Current measurement accuracy ± 0.25 % ± one digit (for 0 ÷ 20 mA range)
Current input resistance < 65 Ω(typical 55 Ω)
Voltage input 0 ÷ 5 V, 1 ÷ 5 V, 0÷10 V, 2 ÷ 10 V
Voltage measurement accuracy ± 0.25 % ± one digit (for 0 ÷ 10 V range)
Voltage input resistance > 50 kΩ
4
- Do not use the unit in explosion hazard areas.
- Do not use the unit in areas with significant temperature variations, exposed to
condensation or icing.
- Do not use the unit in areas exposed to direct sunlight.
- Make sure that the ambient temperature (e.g. inside the control box) does not
exceed the recommended values. In such cases forced cooling of the unit must be
considered (e.g. by using a ventilator).

User manual for meter with U/I input PD72S
Display range -999 ÷ 9999, plus decimal point
Accepted prolonged input overload: 20 %
Outputs relay: 0, 1 or 2 NO, 1 A/250 VAC (cos ϕ= 1)
or OC-type: 0, 1 or 2 30 mA / 30 VDC / 100 mW
sensor power supply: 24 V +5 %, -10 % / max. 100 mA, stabilized
Communication interface RS-485, 8N1 and 8N2, Modbus RTU, not separated
Baud rate 1200 bit/sec ÷ 115200 bit/sec
Display LED, 4 digit, 13 mm height, two-colour (red and green)
(depending on version) or (for IP 65 version) 5 digit, 9 mm height, red
Data memory non-volatile memory, EEPROM type
Protection level IP 65 (from front, after using waterproof cover)
IP 40 (from front)
IP 20 (housing and connection clips)
Housing type panel
Housing material NORYL - GFN2S E1
Housing dimensions 72 x 36 x 97 mm
Mounting hole 66.5 x 32.5 mm
Assembly depth min. 102 mm
Panel thickness max. 5 mm
Operating temperature
0 °C to+50 °C
Storage temperature -10 °C to +70 °C
Humidity 5 to 90 % no condensation
Altitude up to 2000 meters above sea level
Screws tightening max. torque 0.5 Nm
Max. connection leads diameter 2.5 mm2
Safety requirements according to: PN-EN 61010-1
installation category: II
pollution degree: 2
voltage in relation to ground: 300 VAC
insulation resistance: >20 MΩ
insulation strength between power supply and
input/output terminal: 1min. @ 2300 V
insulation strength between relays terminal:
1min. @ 1350 V
EMC according to: PN-EN 61326
5

User manual for meter with U/I input PD72S
- Read the basic safety requirements on page 3 prior to starting the installation.
- Ensure that the power supply network voltage corresponds to the nominal voltage
stated on the unit’s identification label.
- The load must correspond to the requirements listed in the technical data. - All
installation works must be conducted with a disconnected power supply.
- All installation works must be conducted with a disconnected power supply.
- Protecting the power supply clamps against unauthorized persons must be taken
into consideration.
- The unit is designed for mounting indoor inside housings (control panel,
switchboard) assuring appropriate protection against electric impulse waves. Metal
housing must be connected to the grounding in a way complying with the governing
regulations.
- Disconnect the power supply prior to starting assembly.
- Check the correctness of the performed connections prior to switching the unit on.
4. DEVICE INSTALLATION
The unit has been designed and manufactured in a way assuring a high level of user safety and
resistance to interference occurring in a typical industrial environment. In order to take full
advantage of these characteristics installation of the unit must be conducted correctly and
according to the local regulations.
4.1. UNPACKING
After removing the unit from the protective packaging, check for transportation damage. Any
transportation damage must be immediately reported to the carrier. Also, write down the unit
serial number on the housing and report the damage to the manufacturer.
Attached with the unit please find:
- user’s manual,
- warranty,
- assembly brackets - 2 pieces.
4.2. ASSEMBLY
In order to assembly the unit, a 66.5 x 32.5 mm mounting hole (Figure 4.1) must be
prepared. The thickness of the material of which the panel is made must not exceed
5 mm. When preparing the mounting hole take the grooves for catches located on
both sides of the housing into consideration (Figure 4.1).
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This is a class A unit. In housing or a similar area it can cause radio frequency
interference. In such cases the user can be requested to use appropriate
preventive measures.

User manual for meter with U/I input PD72S
Place the unit in the mounting hole inserting it from the front side of the panel, and
then fix it using the brackets (Figure 4.2). The minimum distances between assembly
holes’ axes - due to the thermal and mechanical conditions of operation –are
91 mm x 57 mm (Figure 4.3).
Figure 4.1. Mounting hole dimensions
Figure 4.2. Installing of brackets, and dimensions of connectors.
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User manual for meter with U/I input PD72S
Figure 4.3. Minimum distances when assembly of a number of units
4.3. CONNECTION METHOD
Caution
- Installation should be conducted by qualified personnel. During installation all
available safety requirements should be considered. The fitter is responsible for
executing the installation according to this manual, local safety and EMC
regulations.
- The unit is not equipped with an internal fuse or power supply circuit breaker.
Because of this an external time-delay cut-out fuse with minimal possible nominal
current value must be used (recommended bipolar, max. 2 A) and a power supply
circuit-breaker located near the unit. In the case of using a monopolar fuse it must
be mounted on the phase cable (L).
- The power supply network cable diameter must be selected in such a way that in
the case of a short circuit of the cable from the side of the unit the cable shall be
protected against destruction with an electrical installation fuse.
- Wiring must meet appropriate standards and local regulations and laws.
- In order to secure against accidental short circuit the connection cables must be
terminated with appropriate insulated cable tips.
- Tighten the clamping screws. The recommended tightening torque is 0.5 Nm.
Loose screws can cause fire or defective operation. Over tightening can lead to
damaging the connections inside the units and breaking the thread.
- In the case of the unit being fitted with separable clamps they should be inserted
into appropriate connectors in the unit, even if they are not used for any
connections.
- Unused clamps (marked as n.c.) must not be used for connecting any
connecting cables (e.g. as bridges), because this can cause damage to the
equipment or electric shock.
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User manual for meter with U/I input PD72S
Due to possible significant interference in industrial installations appropriate measures
assuring correct operation of the unit must be applied. To avoid the unit of improper
indications keep recommendations listed below.
- Avoid common (parallel) leading of signal cables and transmission cables together
with power supply cables and cables controlling induction loads (e.g. contactors).
Such cables should cross at a right angle.
- Contactor coils and induction loads should be equipped with anti-interference
protection systems, e.g. RC-type.
- Use of screened signal cables is recommended. Signal cable screens should
be connected to the earthing only at one of the ends of the screened cable.
- In the case of magnetically induced interference the use of twisted couples of signal
cables (so-called “spirals”) is recommended. The spiral (best if shielded) must be
used with RS-485 serial transmission connections.
- In the case of interference from the power supply side the use of appropriate anti-
interference filters is recommended. Bear in mind that the connection between the
filter and the unit should be as short as possible and the metal housing of the filter
must be connected to the earthing with largest possible surface. The cables
connected to the filter output must not run in parallel with cables with interference
(e.g. circuits controlling relays or contactors).
Connections of power supply voltage and measurement signals are executed using the screw
connections on the back of the unit’s housing.
Figure 4.4. Method of cable insulation replacing and cable terminals
9
- If the unit is equipped with housing, covers and sealing packing, protecting against
water intrusion, pay special attention to their correct tightening or clamping. In the
case of any doubt consider using additional preventive measures (covers, roofing,
seals, etc.). Carelessly executed assembly can increase the risk of electric shock.
- After the installation is completed do not touch the unit’s connections when it is
switched on, because it carries the risk of electrical shock.

User manual for meter with U/I input PD72S
Figure 4.5. Terminals description (relay outputs)
Figure 4.6. Terminals description (OC-type outputs)
All connections must be made while power supply is disconnected!
Figure 4.7. Connection of 2-wire current converters
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