DOTECH DPX100 User manual

-1-
DPX100 R20141014
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.
DPX100
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
DPX100 is a digital pressure switch with functions of several pressure switch and
gauges. It measures the low pressure of suction or the high pressure of discharge
of compressor and controls the pressure within predetermined ranges.
: SPECIFICATIONS(STANDARD MODEL)
Description
Power 100 – 240 Vac, 50/60 Hz
Power Consumption MAX 10 VA
Output 3P Relay Outputs / 250Vac, 30Vdc, 5 A
Pressure
Sensors
Measurement
Range
DPX100-115 : -0.10 ~ 1.50 MPa
DPX100-150 : -0.10 ~ 5.00 MPa
Accuracy ±1.0 %FS
Overpressure 150 %FS
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
Pressure Type 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
DPX100-115 / Low Pressure Sensor = -0.10 ~ 1.50 MPa
DPX100-115-00-MPA Digital Pressure Switch Standard(Pressure Unit:: MPa )
DPX100-115-R4-MPA Digital Pressure Switch for Communication(RS485 Modbus )
DPX100-115-00-KGF Digital Pressure Switch Standard(Pressure Unit:: kgf/cm2)
DPX100-115-R4-KGF Digital Pressure Switch for Communication(RS485 Modbus )
DPX100-115-00-BAR Digital Pressure Switch Standard(Pressure Unit:: bar )
DPX100-115-R4-BAR Digital Pressure Switch for Communication(RS485 Modbus )
DPX100-115-00-PSI Digital Pressure Switch Standard(Pressure Unit:: psi )
DPX100-115-R4-PSI Digital Pressure Switch for Communication(RS485 Modbus )
DPX100-150 / High Pressure Sensor = -0.10 ~ 5.00 MPa
DPX100-150-00-MPA Digital Pressure Switch Standard(Pressure Unit:: MPa )
DPX100-150-R4-MPA Digital Pressure Switch for Communication(RS485 Modbus )
DPX100-150-00-KGF Digital Pressure Switch Standard(Pressure Unit:: kgf/cm2)
DPX100-150-R4-KGF Digital Pressure Switch for Communication(RS485 Modbus )
DPX100-150-00-BAR Digital Pressure Switch Standard(Pressure Unit:: bar )
DPX100-150-R4-BAR Digital Pressure Switch for Communication(RS485 Modbus )
DPX100-150-00-PSI Digital Pressure Switch Standard(Pressure Unit:: psi )
DPX100-150-R4-PSI Digital Pressure Switch for Communication(RS485 Modbus )
※Communication is not supported in standard models.
※Specify the pressure unit when ordering.
: Supplied Contents
※This item is provided for securing the bracket tightening all bolts please.
Bracket 1ea User Manual

-2-
DPX100 R20141014
2. INSTALLATION
： DIMENSIONS AND MOUNTING(unit: mm)
※ Please install a siphon tube to protect from pulsating pressure and high temperature contact.
: WIRING DIAGRAM
No Connection Description
1 L1 100–240Vac, 50/60Hz Power Input
2 L2
3
n1
Step 1 Normal open signal
4 common signal
5 Step 1 Normal close signal
6
n2
Step 2 Normal open signal
7 common signal
8 Step 2 Normal close signal
9 n3 Step 3 Normal open signal
10 common signal
11 RS485 TRX + signal
12 TRX - signal
3. USER INTERFACES
: DISPLAY AND CONTROLS
Description
LED
n1
Step1 ON/OFF of Output
n2
Step2 ON/OFF of Output
n3
Step3 ON/OFF of Output
Button
Parameter Settings /
Manual Reset(if pressed twice quickly)
Increase or Move Up
Decrease or Move Down
Select & Save / Display of Saturated Temperature
Setup values will be initialized
if pushing PRG button and ▼button for 10 seconds.
: TRIP / ALARM MESSAGE
No Menu Code Description / Instructions Response at Detection Reset Type
1 Internal Parameter Error 5 Y 5
Change any parameters and turn off.Then restart. Immediate Stop Automatic Reset
2 Pressure Sensor Open O PN Please check apressure sensorbecause it is open
Immediate Stop Automatic Reset
3 Pressure Sensor Short 5 HT Please check apressure sensor because 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.

-3- DPX100 R20141014
4. PARAMETER
: PARAMETER CHANGE
● If there was no input for 3 minutes during setup, it will be returned to operation mode
● If PRG button is pressed at any step, it returns 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 SETTINGS OF GROUP 1 (PRG Button Press for 3 seconds)
No Menu Code Unit Step Min Max Default CustomSetup
DPX100-115 DPX100-150
4 0031 Step 1 ON Pressure 1ON MPa 0.01 -0.10 5.00 0.30 1.40
4 0033 Step 1 OFF Pressure 1OF MPa 0.01 -0.10 1ON - 0.01 0.20 1.30
4 0041 Step 2 ON Pressure 2ON MPa 0.01 -0.10 5.00 0.45 1.50
4 0043 Step 2 OFF Pressure 2OF MPa 0.01 -0.10 2ON - 0.01 0.35 1.40
4 0051 Step 3 ON Pressure 3ON MPa 0.01 -0.10 5.00 0.50 1.60
4 0053 Step 3 OFF Pressure 3OF MPa 0.01 -0.10 3ON - 0.01 0.40 1.50
※ STEP CONTROL OF PRESSURE
Depressurization Control : After comparing the ON pressure of each step, it outputs a signal from the lowest pressure.
Ex.) If ON steps are set(Step 1: 14.0, Step 2: 1.50, and Step 3: 1.60), it begins from the lowest(Step 1) and moves to the next steps in order(→ Step 2 → Step 3).
Pressurization Control : After comparing the ON pressure of each step, it outputs a signal from the highest pressure..
Ex.) If ON steps are set(Step 1: 16.0, Step 2: 1.50, and Step 3: 1.40), it begins from the highest(Step 1) and moves to the next steps in order(→ Step 2 → Step 3).
※ The pressure range depends on a model.
Model Min Max
DPX100-115 -0.10 1.50
DPX100-050 -0.10 5.00
※ The OFF pressure range depends on a control type.
Control Type Min Max
DN(Depressurization Control) -0.10 1on- 0.01
Step OFF pressure must be set under ON pressure.
UP(Pressurization Control) 1on+0.01 5.00
Step OFF pressure must be set over ON pressure.

-4-
DPX100 R20141014
: PARAMETER SETTINGS OF GROUP 2 (PRG Button Press for 5 seconds)
No Menu Code Unit Step Min Max Default Custom
Setup
4 0068 Number of Steps SNO - 1 0 3 3
4 0074 Step ON Delay Time (※1) DT sec 1 0 999 0
4 0075 Minimum Step ON Time (※2) NT sec 1 0 999 0
4 0076 Minimum Step OFF Time (※3) FT sec 1 0 999 0
4 0067 Delay Time between Steps (※4) ST sec 1 0 999 5
4 0069 Rotation (※5) ROT OFF(0)= No Use, ON(1) = ON Rotation when On, ONF(2)= ON/OFF Rotation ONF (2)
4 0070 Control Type CTR DN (0)= Depressurization Control UP (1)= Pressurization Control DN (0)
4 0061 Refrigerant selection
(Saturated Temperature) (※6) 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 0072 Pressure Sensor Offset (※7) OFS MPa 0.01 -1.99 1.99 0.00
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)
(※1) ON Delay Time: Although it is ON condition, it is turned on after ON Delay Time.
(※2) Minimum ON Time: Once the output is on, it is not turned off during the minimum ON time even if it is under the OFF condition.
(※3) Minimum OFF Time: Once the output is off, it is not turned on during the minimum OFF time even if it is under the ON condition.
(※4) Delay Time between Steps: Under the condition that multiple steps are turned on simultaneously, the lead step is turned on first and then the next step is on after Delay Time between Steps.
(※5) Rotation: It controls all the units evenly according to the predetermined ON/OFF and step parameters.
※ ON Rotation: ON - It turns on from the step which is being off the longest. OFF - The step which was on by step ON pressure turns off if it reaches its step OFF pressure.
※ ON/ OFF Rotation: ON - It turns on from the step which was off the longest. OFF - It turns off from the step which is being ON the longest.
(※6) Refrigerant selection: Display saturation temperature in accordance with selected refrigerant.
(※7) 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.
5. COMMUNICATIONS SPECIFICATIONS
: Communication Model ( -R4 )
Description ※ 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
Transmission line connection Multiple line
Communications method RS485 (2-wire, half-duplex)
BPS BPS default 9600 BPS
Parity, Data, Stop bit None, 8 Data, 1 Stop
Protocol Type 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
Address Menu Unit Type Size (Word) DPX200 MMI Scale
4 0011 Output status code - Digital INT 16 Refer to bit status below -
Bit0 n1 Output status - Digital Bit 0 : OFF 1 : ON -
Bit1 n2 Output status - Digital Bit 0 : OFF 1 : ON -
Bit2 n3 Output status Digital Bit 0 : OFF 1 : ON -
4 0013 Alarm status code - Digital INT 16 Refer to bit status below -
Bit0 Pressure sensor faulty -
Digital Bit 0 : Normal 1 : Alarm -
4 0024 Display of pressure value MPa
Analog INT 16 -0.10 ~ 1.50 -10 ~ 150 1/100
4 0027 Display of saturation temperature
for low pressure ℃ Analog INT 16 -150.0 ~ 200.0 -1500 ~ 2000 1/10