Datcon DT4240 Series User manual
DT4240 xx xx xx xx
AC Voltage Meter
Operating Instructions
DT4240 xx xx xx xx
2 20230503-V0
Contents
1. About this document .....................................................4
1.1. Function ................................................................................... 4
1.2. Target group............................................................................. 4
1.3. Symbolism used....................................................................... 4
2. For your safety ...............................................................5
2.1. Authorized personnel ............................................................... 5
2.2. Appropriate use........................................................................ 5
2.3. Warning about misuse ............................................................. 5
2.4. General safety instructions....................................................... 5
2.5. CE conformity........................................................................... 5
2.6. Environmental instructions ....................................................... 5
3. Product description .......................................................6
3.1. Delivery configuration............................................................... 6
3.2. Type designation...................................................................... 6
3.3. Principle of operation ............................................................... 7
3.4. Adjustment ............................................................................... 8
3.5. Display, indicators .................................................................... 9
3.6. Storage and transport .............................................................. 9
4. Mounting.......................................................................10
4.1. General instructions ............................................................... 10
4.2. Main dimensions of the instrument ........................................ 10
4.3. Mounting ................................................................................ 11
5. Connecting ...................................................................13
5.1. Preparing the connection ....................................................... 13
5.2. Connecting the mains ............................................................ 14
5.3. Connecting the input .............................................................. 15
5.4. Connecting the limit relay outputs (option)............................. 16
5.5. Connecting the analogue output (option)............................... 17
5.6. Connecting the RS232 Modbus communication output
(option). ......................................................................................... 18
5.7. Connecting the RS485 Modbus communication output
(option). ......................................................................................... 19
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6. Display and manual controls ......................................21
6.1. The first start-up ..................................................................... 21
6.2. Characters and mnemonics appearing on the display ........... 22
6.3. Manual controls, display, indicators ....................................... 25
7. Setting-up .....................................................................28
7.1. Typing the code (password) in ............................................... 28
7.2. The menu structure ................................................................ 30
7.3. Display brightness (01. menu item)........................................ 31
7.4. Voltage transformer ratio (IX) (03. menu item)....................... 32
7.5. Leading zero(s) enable / disable (06. menu item).................. 33
7.6. The number of averaged measurements (08. menu item)..... 34
7.7. Display refresh time (09. menu item) ..................................... 36
7.8. Setting limit outputs (10., 11. menu item)............................... 37
7.9. Limit output state display mode (12. menu item) ................... 43
7.10. Clear minimum and maximum values (13. menu item)........ 45
7.11. Analoge output signal setting (14. menu item)..................... 46
7.12. Assignment analog output low value to display value
(scaling) (15. menu item) .............................................................. 47
7.13. Assignment analog output high value to display value
(scaling) (16. menu item) .............................................................. 49
7.14. MODBUS communication settings (17. menu item)............. 51
7.15. Tests (18. menu item) .......................................................... 54
7.16. Changing the user code (19. menu item)............................. 57
7.17. Changing the supervisor code (20. menu item) ................... 59
7.18. Resetting the default settings (21. menu item)..................... 61
8. Fault rectification .........................................................62
8.1. Fault finding............................................................................ 62
8.2. Repairing................................................................................ 62
9. Dismounting .................................................................63
9.1. Dismounting procedure .......................................................... 63
9.2. Disposal ................................................................................. 63
10. Appendix.....................................................................64
10.1. Technical specifications ....................................................... 64
10.2. Application example ............................................................. 68
10.3. Setting up the instrument (example) .................................... 72
10.4. MODBUS settings ................................................................ 73
DT4240 xx xx xx xx
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1. About this document
1.1. Function
This operating instructions manual has all the information
you need for quick set-up and safe operation of
DT4240 xx xx xx xx.
Please read this manual before you start setup.
1.2. Target group
This operating instructions manual is directed to trained
personnel. The contents of this manual should be made
available to these personnel and put into practice by them.
1.3. Symbolism used
Information, tip, note
This symbol indicates helpful additional information.
Caution, warning, danger
This symbol informs you of a dangerous situation that could
occur. Ignoring this cautionary note can impair the person
and/or the instrument.
•List
The dot set in front indicates a list with no implied sequence.
1
Sequence
Numbers set in front indicate successive steps in a
procedure.
/
Parting
Parting set in between the elements of a list.
It’s meaning: only one element can be choosen from the list.
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2. For your safety
2.1. Authorized personnel
All operations described in this operating instructions
manual must be carried out only by trained and authorized
specialist personnel. For safety and warranty reasons, any
internal work on the instruments must be carried out only by
DATCON personnel.
2.2. Appropriate use
A DT4240 xx xx xx xx AC Voltage Meter measure AC
voltage in 0-125 V / 0-250 V / 0-450 V ranges.
Detailed information on the application range of the
instrument is available in chapter „Product description”.
2.3. Warning about misuse
Inappropriate or incorrect use of the instrument can give rise
to application-specific hazards, or damage to system
components through incorrect mounting or adjustment.
2.4. General safety instructions
The DT4240 xx xx xx xx is a high-tech instrument requiring
the strict observance of standard regulations and
guidelines. The user must take note of the safety
instructions in this operating instructions manual, the
country-specific installation standard as well as all prevailing
safety regulations and accident prevention rules.
2.5. CE conformity
A DT4240 xx xx xx xx is in conformity with the provisions of
the following standards:
MSZ EN 61326-1 (EMC)
2.6. Environmental instructions
Protection of the environment is one of our most important
duties.
Please take note of the instructions written in the following
chapters:
•Chapter 3.4. Storage and transport
•Chapter 9.2. Disposal
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3. Product description
3.1. Delivery configuration
The scope of delivery encompasses:
•DT4240 xx xx xx xx
•1 pc panel sealing (1)
•2 pc mounting clamps (enclosed in a nylon bag)
•1 pc 4 element plug in terminal (analogue or
communication option) (2)
•documentation:
this operating instructions manual
certification
warranty
Delivered items
3.2. Type designation
DT4240 xx xx xx xx
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3.3. Principle of operation
Area of application The DT4240 xx xx xx xx AC Voltage Meter enable
0-125 VAC / 0-250 VAC / 0-450 VAC voltage ranges to be
displayed on the control panel. Large 14.2 mm height LED
display make process value easily visible at a distance. The
displayed value is proportional to the True RMS value of the
input voltage.
Easy on-site configuration through the front panel
membrane keypad is a major advantage of the
microcontroller-based technology. The configuration
parameters: input range, signal filtering, output scaling,
display refresh rate, limit modes, limit values, etc. are stored
in EEPROM. The settings are protected by a two-level
password against unauthorized manipulation.
Options:
•Two normally open relay contacts (SPST) for limit
switching or for simple control tasks.
•4-20 mA / 0-20 mA galvanic isolated scalable analogue
output. The output can be active (A) or passive (P).
•RS232 galvanic isolated communication output with
MODBUS RTU slave protocol. Only one instrument can be
connected to the PLC or to the computer.
•RS485 galvanic isolated communication output with
MODBUS RTU slave protocol. 32 instrument can be
connected to the PLC or to the computer.
Note: either analogue or communication option can be
implemented at the same time.
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Operating principle
The input voltage is lead to the signal conditioner and
TRMS / DC converter stage. The DC voltage output of this
stage is converted by a 21 bit A/D converter into digital
value. The digital value is processed by a microcontroller.
The microcontroller drives the 5 digit LED display,
processes the front panel membrane keypad, drives the
limit relays, the analogue output and the communication
output.
Power supply The instrument has two power supply version:
DT4240 xx xx xx: 24 VDC, 3.5 W
DT4240 xx xx xx PS: 230 V AC/DC, 3VA / 3.5 W
3.4. Adjustment
The DT4240 xx xx xx xxcan be adjusted through the 3
button front panel keypad. All configuration parameters are
stored in the instrument EEPROM for unlimited period of
time, even when the supply voltage beeng switched off.
The instrument doesn’t need any internal adjustment.
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3.5. Display, indicators
The following figure shows the front panel of the instrument:
1. 5 digit LED display displaying the measured value and
the mnemonic messages.
2. „Rel1” yellow indicator for indicating that limit output 1 is
in “on-state” (LIMIT1).
3. „Rel2” yellow indicator for indicating that limit output 2 is
in “on-state” (LIMIT2).
4. „Status” yellow indicator for indicating that a succesfull
data exchange has granted through the communication
output.
3.6. Storage and transport
This instrument should be stored and transport in places
whose climatic conditions are in accordance with Chapter
10.1. Technical specifications, as described under the
title: Environmental conditions.
The packaging of DT4240 xx xx xx xx consist of enviroment-
friendly, recyclable cardboard is used to protect the
instrument against the impacts of normal stresses occurring
during transportation. The corrugated cardboard box is
made from environment-friendly, recyclable paper. The
inner protective material is nylon, which should be disposed
of via specialised recycling companies.
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4. Mounting
4.1. General instructions
Use the enclosed seal between the instrument and the
panel when mounting the instrument to assure IP 65 from
the front.
Mounting positions
Select a mounting position you can easily read the display
reach for mounting and connecting the instrument and that
minimises the hazard of water, dust or dump getting into the
instrument.
4.2. Main dimensions of the instrument
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