DOTECH DPX200 User manual

-1- DPX200 R20140806
Digital Pressure Switch
CAUTIONS
1. This product may cause an electric shock in handling. Please do not attempt to open it with power turned on.
2. This product should be installed in a place fixed secured by a rack or panel.
3.This product can be used under the following environmental condition.
① Indoor ②Pollution Degree 2 ③At an altitude of 2000m or below
4. Power input must be within the designated ranges.
5. To turn on or turn off power supply for this product, please the circuit breaker or switch of a standard product of IEC
60947-1 or IEC 60947-3 product and install it within a close distance allowing convenient operation by user.
6. Please be understood that if this product is dismantled or modified discretionary, after sales service will not
be able to be provided.
7. An output wire to be used for this product should be inflammable grade FV1 (V-1 grade or above), the thickness
of the wire should be AWG No. 20 or above(0.50mm
2
).
8. In order to prevent it from an inductive noise, please maintain the high-voltage wire and power wire separated.
9. Please avoid installing the product in a place where a strong magnetism, noise, severe vibration and impact exist.
10. When extending the sensor wire, use a shield wire and do not extend it unnecessary long.
11. The sensor wire and signal wire should be away from the power and load wires using conduits separately installed.
12. Please avoid using the product near a device generating strong high frequency noise (high-frequency welding machine, high-
frequency sewing machine, high-frequency radiotelegraph, high capacity SCR controller)
13. Product’s damages other than those decribed in the guarantee conditions provided by the manufacturer shall not be
respoinsible by us.
14. If this unit is used to control machineries (Medical equipment, vehicle, train, airplane, combustion apparatus, entertainment,
processing and transportation equipment, elevator and various safety device etc.) enabling to effect
on human or property, it is required to install fail-safe device.
※ The Aforementioned precautions must be observed, and if you fail to do so, it may cause a product’s breakdown
.
※ The specifications, dimensions, and etc. are subject to change for enhancement without a prior notice.
DPX200
User Manual
DOTECH INC.
6F, JOONGANG-ILBO B/D, 30, Dongsan-ro, Danwon-gu, Ansan-si, Gyeonggi-do,
KOREA
TEL: [phone] FAX: [phone]
www.dotech21.com
1. OVERVIEW
※ FEATURES
DPX200 integrates the functions of high and low pressure switches and gauges. It
measures the low pressure of suction and the high pressure of discharge of compressor
and outputs the warning signals when the high or low pressure is out of range.
: SPECIFICATIONS(STANDARD MODEL)
Description
Power 100 – 240 Vac, 50/60 Hz
Power Consumption MAX 10 VA
Output 3P Relay Outputs / 250Vac, 30Vdc, 5 A / HPS, LPS, HPC
Pressure
Sensors
Measurement
Range -0.10 ~ 5.00 MPa
Accuracy ±1.0 %
Overpressure 200 %
Stability ±0.5 %FS/year
Shock 20 g sinusoidal, 11 msec
Vibration x-y-z directions of 5 -2000Hz / 10g
Working Temp. -40 ~ 120 °C
Connection 7/16UNF” / MALE
PressureType Gauge
Dimensions 159(W)mm X 128(H)mm X 58(D)mm
Operation Temperature -10~50 °C / Humidity 90%RH or less
Storage Temperature -20~60 °C / Humidity 90%RH or less
: SELECTION GUIDE
Model Description
DPX200-HL-00-MPA
Digital Pressure Switch Standard(Pressure Unit::MPa )
DPX200-HL-R4-MPA
Digital Pressure Switch for Communication(RS485 Modbus )
DPX200-HL-00-KGF
Digital Pressure Switch Standard(Pressure Unit:: kgf/cm2)
DPX200-HL-R4-KGF
Digital Pressure Switch for Communication(RS485 Modbus )
DPX200-HL-00-BAR
Digital Pressure Switch Standard(Pressure Unit::bar )
DPX200-HL-R4-BAR
Digital Pressure Switch for Communication(RS485 Modbus )
※Communication is not supported in standard models.
※Specify the pressure unit when ordering.
: Supplied Contents
Bracket 1ea User Manual
※This item is provided for securing the bracket tightening all bolts please.

-2- DPX200 R20140806
2. INSTALLATION
：DIMENSIONS AND MOUNTING(unit: mm)
※ Please install a siphon tube to protect from pulsating pressure and high temperature contact.
LP : Low Pressure HP : High Pressure
(unit : mm)
: WIRING DIAGRAM
No Connection Description
1 L1
100–240Vac, 50/60Hz Power Input
2 L2
3
LPS
Open when the low pressure is below lower limit
4
Common signal
5
Closed when the low pressure is below the lower limit
6
HPS
Open when the high pressure is above the upper limit
7
Common signal
8
Closed when the high pressure is above the upper limit
9 HPC
Closed when the high pressure is above the upper limit
10
Common signal
11 RS485
RS-485 + signal
12
RS-485 – signal
3. USER INTERFACES
: DISPLAY AND CONTROLS
Description
LED
HPS
ON/OFF of Ouput / ON when Overpressure
HPC
ON/OFF of Ouput / ON when Fan is Running
LPS
ON/OFF of Output / ON when Underpressure
RST
ON when Manual Reset
Button
CONTROLS
Parameter Settings / Manual Reset(if pressed twice quickly)
Increase or Move Up
Decrease or Move Down
Select & Save / Display ofSaturatedTemperature

-3- DPX200 R20140806
4. PARAMETER
: PARAMETER CHANGE
●Press SEL button in operation mode to change set point
●Press SEL button for 3 seconds to change quick setup
●Press PRG button for 3 seconds to change parameters
●Movement to next menu and storage of set value during parameter setup are performed by SEL button.
●Set value will be flickering in every 0.5 seconds and change set value using ▲key or ▼key
●Present temperature value will be displayed if pressing SEL button for 3 seconds after finished setup
●If there was no input for 3 minutes during setup, it will be returned to operation mode
※This manual is based on the standard model for MPa and the displays and settings of pressure unit are subject to change depending on the models for other pressure units.
: PARAMETER TABLE
No Menu Code Unit Step Min Max Default CustomSetup
4 0031
High Pressure Switch SetValue
HPS MPa 0.01
-0.1 0 5.00 2.60
4 0032
High Pressure Switch Reset Mode (※1)
(Manual / Automatic Reset)
HPH A (0)= Automatic Reset H (1)= Manual Reset H(1)
4 0033
High Pressure Switch Releasing Value
HPF MPa 0.01
-0.1 0 HPS- 0.01 2.50
4 0041
Set Value for Switching ON a Fan
HPC MPa 0.01
-0.1 0 5.00 1.50
4 0043
Set Value for Switching OFF a Fan
HCF MPa 0.01
-0.1 0 HPC- 0.01 1.40
4 0051
Low Pressure Switch SetValue
LPS MPa 0.01 -0.10 5.00 0.25
4 0052
Low Pressure Switch ResetMode (※1)
(Manual / Automatic Reset)
LPH A (0)= Automatic Reset H (1)= Manual Reset A(0)
4 0053
Low Pressure Switch Releasing Value
LPF MPa 0.01
LPS+ 0.01 5.00 0.35
4 0055
Low Pressure Switch DelayTime (※2)
LPD sec 1 0 999 0
4 0061
Refrigerant Selection (※3)
RFY
R22 (0)= R22
R23 (1)= R23
123 (2)= R-123
124 (3)= R-124
134 (4)= R-134a
404 (5)= R-404a
407 (6)= R-407c
410 (7)= R-410a
507 (8)= R-507
R22 (0)
4 0063
Communication ID
ID - 1 1 255 1
4 0064
Communication BPS
BDR 48 (0)= 4800 96 (1)= 9600 192 (2)= 19200 384 (3)= 38400 96 (1)
4 0071
Low Pressure Offset(※4)
LOF MPa 0.01 -1.99 1.99 0.00
4 0072
High PressureOffset(※4)
HOF MPa 0.01 -1.99 1.99 0.00
(※1) Reset mode: Automatic Reset (A ):It will be rest automatically when reaching release pressure value.
Manual reset (H ):It will not be reset when reaching release pressure value unless users press RST button twice
consecutively.
(※2) Low pressure switch delay time : If output is activated, it maintenances ON status during minimum ON time even under the OFF condition.
(※3) Refrigerant selection : Display saturation temperature in accordance with selected refrigerant.
(※4) Offset : Offset the differential for pressure sensor.
e.g) If displayed pressure value: 0.20MPa and actual pressure value: 0.22MPa
It is offset by inputting +0.02MPa.

-4- DPX200 R20140806
: TRIP / ALARM MESSAGES
No Menu Code Description / Instructions Response at Detection ResetType
1 Internal Parameter Error 5 Y 5 Change any parameters and turn off.Then restart. Immediate Stop Automatic Reset
2 High Pressure Sensor Open HO P Please check a high pressure sensorbecause it is open. Immediate Stop Automatic Reset
3 High Pressure Sensor Short H5 H Please check a high pressure sensor because it is short. Immediate Stop Automatic Reset
4 Low Pressure Sensor Open LO P Please check alow pressure sensorbecause it is open. Immediate Stop Automatic Reset
5 Low Pressure Sensor Short L5 H Please check alow pressure sensorbecause it is short. Immediate Stop Automatic Reset
※When it alarms, it beeps and all the outputs are cut off.To stop the beep, press the reset.
5. COMMUNICATIONS SPECIFICATIONS
: Communication Model ( -R4 )
Description
Transmission line connection Multiple line
Communications method RS485 (2-wire, half-duplex)
Baud-rate BPS default 9600 BPS
Parity, Data, Stop bit None, 8Data, 1 Stop
ProtocolType Modbus RTU MODE
Function Code Read HOLD REGISTERS (0x03) , Preset Single Register (0x06)
Maximum Read Word 16 Word
Media Type BELDEN 9841 / 9842, LG LIREV-AMESB
Poll interval 100msec
: HOLD REGISTERS
※ Pressure Unit Conversion Table
MPa bar kgf/cmpsi
1MPa 1 1ⅹ10 1.0197162ⅹ10 1.450382ⅹ10
1bar 1ⅹ10 1 1.019716 1.4503824ⅹ10
1kgf/cm9.80665ⅹ10 9.80665ⅹ10 1 1.4223393ⅹ10
1psi 6.895ⅹ10 6.8947ⅹ10 7.0307ⅹ10 1
Address Menu Unit Type Size (Word) DPX200 MMI Scale
4 0011 Output status code - Digital INT 16 Refer to bit status below -
Bit0 High Pressure Switch SetValue - Digital Bit 0 : OFF 1 : ON -
Bit1 Set Value for Switching ON a
Fan - Digital Bit 0 : OFF 1 : ON -
Bit2 Low Pressure Switch SetValue Digital Bit 0 : OFF 1 : ON -
4 0013 Alarm status code - Digital INT 16 Refer to bit statusbelow -
Bit0 Low pressure sensor faulty - Digital Bit 0 : Normal 1 : Alarm -
Bit1 High pressure sensor faulty - Digital Bit 0 : Normal 1 : Alarm -
4 0023 Display of low pressure value MPa Analog INT 16 -0.10 ~ 1.50 -10 ~ 150 1/100
4 0024 Display of high pressure value MPa Analog INT 16 0.00 ~ 5.00 0 ~ 500 1/100
4 0026 Display of saturation
temperature for low pressure °C Analog INT 16 -150.0 ~ 200.0 -1500 ~ 2000 1/10
4 0027 Display of saturation
temperature for high pressure °C Analog INT 16 -150.0 ~ 200.0 -1500 ~ 2000 1/10