Omega Products DP21 Installation Manual
DP21 SERIES
MICROPROCESSOR-BASED
DIGITAL INDICATOR
INSTRUCTION MANUAL
Thank you for purchasing the Omega DP21 Series.
Please check that the delivered product is the correct item you orderd.
Please do not begin operating this product until you have read
this instruction manual thoroughly and understand its contents.
"Notice"
Please ensure that this instruction manual is given to the final user of
the instrument.
Preface
This instruction manual is meant for those who will be involved in the
wiring, installation, operation and routine maintenance of the DP21
series.
This manual describes the care, installation, wiring, function, and
proper procedures for the operation of DP21 series. Keep this manual
at the work site during operation of the DP21 series. While using this
instrument, you should always follow the guidance provided herein.
For matters regarding safety, potential damage to equipment and/or
facilities, additional instructions are indicated by the following
headings:
WARNING
Exercise extreme caution as indicated. This heading indicates
hazardous conditions that could cause injury or death of personnel.
CAUTION
Exercise extreme caution as indicated. This heading indicates
hazardous conditions that could cause damage to equipment and/or
facilities.
NOTE
This heading indicates additional instructions and/or notes.
The mark designates a protective conductor terminal.
Make sure to properly ground it.
DP21 series indicator is designed for indicating temperature,
humidity and other physical subjects. It must not be used in any
way that may adversely affect the safety, health or working
conditions of those who come into contact with the effect of its
usage. When used, adequate and effective safety countermeasures
must be provided at all times. No warranty, express or implied, is
valid in case of using this product without the use of proper
safety countermeasures correspondingly.
WARNING
To avoid damage to the connected equipment, facilities or the
product itself due to a fault of the product, safety
countermeasures must be taken before usage, such as proper
installation of the fuse and the overheating protection device. No
warranty, expressed or implied, is valid in case of usage without
having implemented proper safety countermeasures.
• The mark on the plate affixced to the instrument:
On the terminal nameplate affixed to the case of your instrument,
the mark is printed. This is to warn you of the risk of electrical
shock which may result if the charger is touched while it is
energized.
•A means to allow the power to be turned off, such as a switch or a
breaker, should be installed in the external power circuit to be
connected to the power terminal of the instrument.
Fix the switch or the breaker adjacently to the instrument in a
position which allows it to be operated with ease, and with an
indication that it is a means of turning the power off. The switch
or the breaker should meet the requirements of IEC947, UL489,
UL1066 or CSA C22.2 No.5.1.
•Fuse: Since the instrument does not have a built-in fuse, do not
forget to install a fuse in the power circuit to be connected to the
power terminal.
The fuse should be positioned between the switch or the breaker
and the instrument and be attached to the L side of the power
terminal.
Fuse Rating: 250V AC1.0A/lagged type
Use a fuse which meets the requirements of IEC127, UL248-1~2
48-16 or CSA C22.2 No.926.
•A voltage/current different from that of the input specification
should not be added on the input terminal. It may reduce the life
of the product and/or result in problems with the product.
For the rated voltage/current, see Specifications.
For the rated voltage (mV or V) or current (4-20mA) input, the
input terminal should be connected with a device which meets the
requirements of IEC1010 as input terminals.
•Voltage/current of a load to be connected to the output terminal
and the alarm terminal should be within a reted range. Otherwise,
the temperature will rise and reduce the life of the product and/or
result in problems with the product.
For the rated voltage/current, see Specifications.
The output terminal should be connected with a device which
meets the requirements of IEC1010.
•The DP21 series indicator is provided with a draft hole for heat
discharge. Take care to prevent metal or other foreign matter from
obstructing it. Failure to do so may result in problems with the
product any may even result in fire.
• Do not block the draft hole or allow dust or the like to adhere to
it. Any rise in temperature or insulation failure may result in a
shortening of the life of product and/or problems with the
product.
For spaces between installed instruments, refer to 1. External
Dimensions and Panel Cutout on page 1.
• It should be noted that repeated tolerance tests against voltage,
noise, surge, etc., may lead to deterioration of the instrument.
•User must not modify the instrument or operate it anomalously.
Contents
page
1External Dimensions and Panel Cutout............................................ 1
2 Installation and Matters to be Attended to....................................... 1
2-1 Installation............................................................................... 1
2-2 Matters to be Attended to........................................................ 1
3Connection of Terminals.................................................................. 2
4Wiring.............................................................................................. 3
5Front Panel Information................................................................... 6
6Selection of Measuring Range and Functions.................................. 7
6-1 How to Detach Inner Body...................................................... 7
6-2 Selection of Functions (SW2).................................................. 7
6-3 Selection of Measuring Range................................................ 8
7Parameters....................................................................................... 10
7-1 Display Block......................................................................... 11
7-2 Parameter Setting Block......................................................... 11
7-2-1 Range Block........................................................................ 11
7-2-2 Alarm Block (Additional/Optional function)...................... 11
7-2-3 Communication Block (Additional/Optional function)...... 11
page
8Operating Procedure........................................................................12
8-1 Display when power is applied.............................................. 12
8-2 Display Block (Common to all input types)........................... 12
8-3 Holding PV Value.................................................................. 13
8-4 Release (Reset) of Display of
Maximum/Minimum PV Value.............................................. 13
8-5 Range Block........................................................................... 13
8-5-1 Sensor Compensation Function (Input shift) for Sensor
(thermocouple or R.T.D) Input Type..................................13
8-5-2 Voltage/Current Input Type................................................14
8-5-3 Analog Output Scaling Function........................................15
8-6 Alarm Block........................................................................... 17
8-6-1 Latching alarm (to be designated at the time of ordering)..18
9 Codes for Instrument Selection...................................................... 20
10 Troubleshooting............................................................................. 21
10-1 Identifying cause of trouble............................................... 21
10-2 Display in case of input problems..................................... 21
CAUTION
CAUTION
Check before use
This product has been fully checked for quality assurance prior to shipment. Nevertheless, you are requested to make
sure that there is no error, damage or shortage of delivered items by confirming the model codes and checking the
external view of the product and the number of accessories.
Checking accessories:
Instruction manual 1 set
Unit decal 1 sheet
Communication Interface Instruction manual 1 set (Included with the Communication function option)
Connecter (DDK 225M-21421-188) 1 piece (Included with the BCD option)
NOTE: Contact our representative or out local office concerning any problems with the product, accessories or related items.
Caution for use
1) Avoid operating keys of the front panel with hand or sharp objects or motions. Lightly touch the operating keys
with finger tip for operation.
2) Avoid using solvents such as thinner; wipe gently with a dry colth.
2-1 Installation
The installation panel should have a thickness of 1~3.5mm.
The instrument is of a press-and-fit type. Press it from the front so as to fit firmly into the panel hole.
NOTE: The DP21 indicator is of a panel fit-in type. It must be fitted in the panel for use.
2-2 Matters to be Attended to
There is inflammable or corrosive gas, soot or dust to impair insulation.
The ambient temperature is below −10˚C and above +50˚C.
The ambient humidity is above 90% RH and there is dew condensation.
The instrument is subjected to strong vibrations and shocks.
There is a strong electric circuit or a source of inductive interference.
There is exposure to water drops or direct sunlight.
Where the elevation is in excess of 2,000m.
NOTE: The environmental conditions belong to the installation category II of IEC664 and the degree of pollution is 2.
1
1 External Dimensions and Panel Cutout
2 Installation and Matters to be Attended to
In case where there is an intention to operate this product at one of the following sites, be aware that the occurrence
of life and/or other dangerous situations is considerable.
Exercise caution and avoid these places when selecting an operational site.
Unit: mm
Panel cutout
+08
92
0
10
110
100
45
+06
0
110mm or longer
48 × 96
60mm or
longer
44.6 × 91.6
CAUTION
Alarm type such as lower limit alarm or higher limit alarm of alarm 1 and alarm 2 is selected by key
operation.
For both higher limit alarm and lower limit alarm, the C1-NO1 (C2-NO2 in the case of alarm 2) contacts are
closed when the set point of the alarm is reached.
2
3 Connection of Terminals
24V DC 5W/24V AC
50/60Hz 8VA
+ −
11
100−240V AC ~
50/60Hz 14VA
L N
11
12
12
13
ALARM1
2.5A 240V AC
14 15 16 17 18 19
NO1
22
∗
1
21
BCD OUTPUT
12345678910
RESET
HOLD
∗
1 Wiring Codes/Terminal Numbers for Each Function
Function
121222324
Analog output
−
C1
ALARM2
2.5A 240V AC
NC1
NO2
Terminal Numbers
+
C2
BBA
DC
NC2
−+
−+
20
24
23
∗
1
Communication
RS-232C
RS-422A
RS-485
SG
SG
SG
SD
SD −
−
DC output (24V DC 50mA)
RD
SD +
+
RD − RD +
− +
For thermocouple input, use the designated compensating conductor and limit the external resistance to 100Ω or
below.
For R.T.D. input, the lead wire resistance should be 5Ω or less per line, and three lines should have the same
ohmic value.
Use of shielded cable for static induction and twist cable for electromagnetic induction is effective.
Connect the instrument to terminals according to the terminal diagram on page 2 and the wiring diagram attached
onto the instrument case.
Use a suitable press-fit terminal for the M3.5 terminal screw in the wiring for the instrument.
When wiring, use wire (1mm2minimum in sectional area) of 600V grade polyvinyl chloride insulated wire or
equivalent wire which has the same ratings.
NOTE: When the instrument is installed in a place subject to vibrations or shocks, use round press-fit terminals to
prevent disconnection from terminals.
NOTE: For wiring for power supply, etc., use wire as provided in the Electric Supplies Control Act.
Use wire 2mm2or larger for grounding. Grounding resistance should be 100Ω or less. The instrument
should be grounded at one point contact with the GND terminal.
Crossover wiring is not allowed.
•
Example for the types with alarm and analog output functions
3
4 Wiring
•
Always disconnect this product from any power source during wiring operation to prevent electrical shock.
•
Be certain that the protective conductor terminal is properly grounded. Otherwise, a serious electric shock
may result.
•
Avoid touching the wired terminal and charged devices while supplying power.
Example of Wiring
WARNING
7.2mm
7.0mm max
Alarm 1 Alarm 2
Power
Analog output signal
0 ~ 10mV or
4 ~ 20mA
SR106
12
HOLD
13
RESET
NO1
C1
BCD OUTPUT
NC1
NO2
NC2
C2
BBA
DC
11
22
−
21
12345678910
14 15 16 17 18 19
20
24
23
−+
−+
If there is significant noise from the power line, the installation of an insulating transformer and the use of a noise
filter are recommended.
In case such a load (inductive) as relay, electromagnetic switch or electromagnetic valve is driven via an alarm
relay contact, in order to get rid of sparks. A spark killer, CR (for AC) or diode (for DC) should be connected in
parallel with an exciter coil as shown below.
4
~
Insulating transformer
100/100V
200/200V
Noise filter
ground ground
Wire as short as possible
Indicator
100-240V AC
100-240V AC
50/60Hz
Recommended noise filter: TDK's ZMB2203-13
Alarm output
contact
Auxiliary relay
exciting coil
Spark killer
CR circuit
NO
RY RY
C
AC power supply
When AC supply is used
for auxiliary relay
DC power supply
When DC supply is used
for auxiliary relay
+ −
Diode
Typical Spark Killers (CR Filters)
Manufacturer
Shizuki Denki
Nittsuko
Matsushita Electric
SK25B473MA
CR2E333C121
ECQJ0187X
SK25B104MA
CR2E104C121
ECQJ0186X
Use
Small relay Electromagnetic switch
•
DC power supply for sensor
For this instrument, DC power supply (24V DC 50mA) for sensor can be selected to use an H71 or TH71 series
humidity sensor combinedly. (This can not be used in case of an 24V AC or DC supply.)
• H71 or TH71 series humidity sensor
5
8910
23
24
BBA
−
−
−
−
+
+
+
+
−+
DC
DP21
24V DC 50mA
POWER
H71/TH71
OUT
CH
6
5 Front Panel Information
3 4 5 6 7
Display screen
1
2
Max value lamp
(MAX)
2
1
Max value
lamp
Display key Alarm key
Min value
lamp
Communication key
Hold
lamp
Communication
lamp
Range key Setting key
12131415
Name Function
Displays PVs.
Displays parameters and figures when various functions
are set.
Remains lit while a max value is shown on display
screen by means of display key.
Alarm 1
lamp
Alarm 2
lamp
Range
lamp
9
1011
8
3
Min value lamp (MIN)
4
Hold lamp (HOLD)
5
Communication lamp
(COM)
Alarm 1 lamp (AL1)
6
7
Alarm 2 lamp (AL2)
8
Range lamp (RNG)
9
Up key
Shift key
10
11
Setting (SET) key
Range key
12
Alarm (ALM) key
13
Communication key
14
Remains lit while a min value is shown.
Remains lit while a processing value is held by means of
an external signal.
Remains lit while in the communication mode.
Lights when the alarm 1 function is put to work.
Lights when the alarm 2 function is put to work.
Remains lit while the range block is operated.
Increases a PV.
Takes a figure up or down.
Registers a set value.
Moves to the range block.
Moves to the alarm block.
Moves to the communication block.
Option
Option
Option
Option
Option
15
Display key
Moves to the display block.
6-1 How to Detach Inner Body
When the instrument is removed/replaced in the case, make sure the power is off. If it is done while the power is
on, it may lead to problems with the product and/or other problems.
To set a function or to select a measuring range, the inner body has to be drawn out.
Insert a minus screwdriver of 6mm~9mm into the opening (where packing is exposed) of the front case and rotate
the screwdriver while pushing up the lock lever behind the packing. Once the instrument comes out by a few
millimeters, you can remove it by hand.
6-2 Selection of Function (SW2)
Select a function from the table and set it by means of a dip switch (SW2). Unless otherwise designated, all the
switch knobs, codes 1 ~ 5, are pressed down (OFF) in the initial setting.
7
6 Selection of Measuring Range and Functions
NOTE: The switch is set to ON or OFF easily when the switch knob is pressed by means of a thin tool such as a
pincette or a small screwdriver. The switch tends to break if an unnecessarily high force is applied.
CAUTION
How to detach inner body Position of switches (on the right side)
Cut-out portion
Front
panel
SW2
SW1
SW1
8
A
6
4
C
E
2
0
SW2
1
2
3
4
Table for Function Selection
Switch Knob Position
Function/Feature Switch code
Down (OFF) UP (ON)
Display renewal cycle
RTD input standard
Alarm
1
2
3
0.25 sec
JPt (Former JIS)
Non-standby
2.0 sec
Pt (JIS/IEC)
Standby
ON
5
OFF
Key lock
Unit
4
5
Unlocking
˚C
Lock setting
˚F
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