FX32EV - 00 :
FX32EV - R4 :
FX32EV - R2 :
FX32EV - A1 :
1 2
4
3
5 6
8
7
9 10 11
AC100 - 240 V ~
pressure
50/60Hz
FX32EV
OP
TIO
N
MO
DU
LE
RS-485 COMM.
OPTION MODULE
1
2
3
4
TRX
TRX
SG
1
2
3
4
RXD
TXD
GND
1
2
3
4
4~20mA
4~20mA
SG
RS-232 COMM.
OPTION MODULE
4~20mA Output
OPTION MODULE
FX32EV
%
1
0
100
50
bar
1
-1
99
bar
1
-1
99
-1
bar
0.1
-9.9
9.9
0.0
‘C
0.1
-19.9
19.9
0.0
sec
0.1
O F F
9.9
O F F
9
48
: 4800BPS,
96
: 9600BPS,
I92
: 19200BPS,
384
: 38400BPS
96
M O T
B D R
L O C
R T Y
2 2
: R22
I 3 4
: R134A
4 0 4
4 I 0
: R410A
7 I 7
: R717
: R404A
2 3
: R23
4 0 7
: R407C
0:Rotation, 1:Superheat, 2:Temperature, 3:Suction pressure
0:Always operation, 1:Remote operation, 2:Communication operation
0:Pressure transmission output, 1:Control output (for 4~20mA type valve control)
S H
S L
P O F
T O F
REV. 2010. 5. 3
FX32EV
Ev
reset
SH
T
P
Ev
SH
T
1
2
300
301
302
303
304
307
308
319
temp
start
EVout
Alarm
mv
bar
bar
rst
rst
mv
EV
2 2
B I R
ID1 Pt1k COM 4~20mA +V
28
35
70
78
8
FX32EV
Ev
SH
T
P
reset
mv
Connection Diagram
Dimensions and Panel Cut-Out Form
Constitution
Operation Button
Order Information
Basic model
RS-485 communication function model (MODBUS RTU MODE)
(※ communication cable is included)
RS-232 communication function model (MODBUS RTU MODE)
(※ communication cable is included)
Pressure transmission output function model or
For 4~20mA type electronic expansion valve
Lighting when expansion valve is on
The degree of superheat
Temperature
P
Pressure
℃ : Temperature, bar : Pressure
Lighting when trip, flickering when alarm
Program setup
Push twice successively and
quickly when clearing alarm
of manual return type
Execution of options or
input of setup value
Move between menus &
Increase of setup value
Confirmation of valve control
output (during pushing button)
Menu movement or
decrease of setup value
Basic Specification
Power
AC100 - 240V ~ , 50/60Hz (MAX 4VA)
Control Mode
Electronic expansion valve control unit using PID control algorithm
SSR output 1 point (expansion valve on/off), Relay output 1 point (alarm port)
Pt1000Ω temp. sensor 1 point, 4~20mA
pressure sensor input 1 point (built-in sensor loop power)
Temp. -10~50℃ (when no dew condensation)
Temp. -20~60℃, Humidity Under 90%RH
Temp. sensor (DPR-PT1K-P6D50L,-100~100’C)
Pressure sensor (-1~9bar or 0~30bar)
Indication is possible in 0.1℃ unit between -19.9 and 99.9.
outside of that range, in 1℃
screw bolt terminal block (1.5mm wire available)
2
PreCaution for Use
Accessory
Sensor type : Pt1000Ω
Measurement range : -100 ~ 100℃
Accuracy : ±0.3℃
Probe : Dia.6, 50mm,SUS304
Protection level : IP67
Cable : 2C X 0.5mm, Stainless mesh shield teflon cable
Suction Pressure Sensor : DP506
Pressure measure range : -1~9bar, 0~30bar, 0~16bar
Operating temperature : -40 ~ 125℃
Accuracy : ±0.5% FS
Protection level : IP67
Signal output : 4~20mA (2 Wire)
Indicator Lamp
Option
Set-up of the degree of superheat
Outline
Error Messages
How to change setting 1 group and 2 group
* Minimum Valve ON Time : It makes compulsorily valve ON during setup time if it needs control for period which is shorter than setup time when controlling valve ON/OFF.
This function do not work when setup is OFF.
* Expansion Valve Control Cycle : Setup control cycle of ON/OFF type expansion valve. Setup 6 sec. for AKV series of Danfoss.
* Output when Sensor Error : Setup output ratio of expansion valve to output compulsorily when temperature or pressure sensor error occurs.
* Expansion Valve Control Slope : Input control various value of expansion valve to increase or decrease per second. It is used when rapid control is needed.
* Display Mode : Display in order Superheat --> Temperature --> suction pressure when rotation mode.
Setting 1 Group Table
Setting 2 Group Table
UNIT
STEP
MIN.
MAX.
DEFAULT
USER SETUP
DESCRIPTION
CODE
NO.
Bias
002
003
004
005
006
007
008
009
013
014
015
016
019
‘C
0.1
0.5
99.9
5.0
D F R
Proportional Band
SEC
1
0
999
30
I R T
Integral Time
SEC
1
0
999
0
D R T
Derivative Time
K
0.1
-9.9
99.9
0.0
L S H
Low Superheat Alarm
K
0.1
-9.9
99.9
19.0
H S H
High Superheat Alarm
bar
0.1
-1.0
99.9
0.5
L O P
Pressure Lower Limit Alarm (LOP)
bar
0.1
-1.0
99.9
8.0
H O P
Pressure Upper Limit Alarm (MOP)
%
1
0
100
100
H I 0
Expansion Valve Control Upper Limit
%
1
0
0
0
L O 0
Expansion Valve Control Lower Limit
K
0.1
0
5.0
0.1
D B N
No Response Control Range
SEC
1
0
300
5
R D T
Operation Delay Time
%
1
0
100
oFF
M A 0
Expansion Valve Compulsory Control
Lock Selection
Refrigerant
Upper Limit Input Range of Pressure Sensor
Lower Limit Input Range of Pressure Sensor
Pressure Sensor Compensation
Temperature Sensor Compensation
Minimum Valve ON Time
sec
1
O F F
60
6
P R T
309
Expansion Valve Control Cycle
%
1
0
100
0
S F O
310
Output when Sensor Error
%
1
O F F
100
5
0
1
0
J E K
311
Expansion Valve Control Slope
D
I S
312
Display Mode
R M T
313
Remote Operation Function
A O M
315
Analogue Output Function (-A1 model)
1 ~ 32
1
I D
318
Communication ID (-R4 model)
Communication Speed (-R4 model)
:
:
Setting 1 group Lock
Setting 1,2 group and superheat setup Lock
:
:
Setting 1, 2 group Lock
Lock clear
Model
Input/
Output
Operation
Storage
Sensor
Display
Connection
Terminal
Initialization of Setup Values
If pushing for 10 sec. at the same time, setup values are initialized
* Bias : Initial control output value of expansion valve (expansion valve open ratio at point which setting superheat value is equal to current superheat value).
* Proportional Band : Initial control range value of expansion valve (when setting superheat is 6.0K and proportional band is 5.0K, it can be controlled within range of
3.5K(0%) ~ 8.5K(100%)) - Please increase proportional band if width of vibration of superheat value is large.
* Integral Time : It controls open ratio of expansion valve by accumulating error each integral time - increase integral time if cycle of vibration of superheat value is short.
* Derivative Time : It is used in circumstance where It needs instant response. Generally setting value is '0'.
* Low Superheat Alarm : Input low superheat alarm value. It closes valve until become control lower limit value of expansion valve if superheat is lower than low superheat alarm value.
* High Superheat Alarm : Input high superheat alarm value. It opens valve until become control upper limit value of expansion valve if superheat is higher than high superheat alarm value.
* Pressure Lower Limit Alarm : It opens expansion valve to 100% if suction pressure is lower than pressure lower limit alarm.
* Pressure Higher Limit Alarm : It closes expansion valve to 0% if suction pressure is higher than pressure upper limit alarm.
* Expansion Valve Control Upper Limit : Setup maximum open ratio of expansion valve (but, It opens valve to 100% regardless of upper limit value if pressure lower limit alarm occurs.)
* Expansion Valve Control Lower Limit : Setup minimum open ratio of expansion valve (but, It closes valve to 0% regardless of lower limit value if pressure upper limit alarm occurs.)
* No Response Control Range : Keep open ratio of expansion valve if superheat is controlled within setting sup/- (no response control range).
* Operation Delay Time : Start to control after setup delay time if there is operation start input.
* Expansion Valve Manual Control : It is used when user compulsorily controls expansion valve at open ratio which is set by user. compulsory control function is not used if setup is OFF.
Operation
Mode
Set-up by using ▲ ▼ button
● If push SEL button for 3 sec. then setup is completed and returns
to operation mode.
● If there is no input for 180 sec. during setup, it returns to operation mode.
First setting parameter
Last setting parameter
Push for 3 sec. in case of setting 1 group
Push for 5 sec. in case of setting 2 group
Operation
Mode
Set-up by using ▲ ▼ button
Push for 3 seconds.
FX32EV is especially designed for control and management of electronic expansion valve
at refrigeration unit. It is a electronic expansion valve controller to control the degree of
superheat by using PID control and through measuring pressure and temperature.
This unit is composed of EX32EV main board, temperature sensor and pressure sensor
for gauging suction pressure.
- FX32E supports ON/OFF electronic expansion valve (AKV-danfoss).
- R22, R134a, R404a, R407c, R410a, R717, R23
(Currently supported refrigerant August 2009)
- R507c, R290, R600, R600a, R744, R728 (Planned)
FX32EV can control superheat of various refrigerant.
- PID superheat control through protection and safety compensation function.
- Electronic expansion valve control unit which is controlled by 4~20mA signal
Control method of electronic expansion valve
FX32EV is a control unit for ON/OFF type electronic expansion valve.
(It doesn't support step motor type expansion valve.)
- It can control in 0.1% unit from 0.0 to 100.0% through PWM (open ratio control)
control method
- Control cycle can be set from 1 sec. to 60 sec. (control in 10msec. unit)
D
O
T
E
C
H
A
3
0
F
1
0
0
.1
0
0
6
12
18
t(sec)
50%
25%
75%
On
Off
Control cycle : 6 seconds
Pressure sensor and Temperature sensor
FX32EV has adopted pressure sensor and temperature sensor which are especially designed for refrigerant gas to secure accuracy and safety.
- Pressure sensor : -1 ~ 9 bar (4~20mA) or 0 ~ 30 bar (4~20mA) It can be selected
- Temperature sensor : -100 ~ 100’C, Pt1000Ω
Electronic expansion valve control regulated by 4~20mA signal
FX32EV-A1 model can transmit pressure value measured by 4~20mA method and can be used for electronic expansion valve which is controlled by 4~20mA signal.
Built-in RS485 communication function
FX32EV-R4 with RS485 can interface with another device and supports MODBUS RTU/ASCII type protocol.
Compulsory parameter for operation
Second degree parameter for optimum operation
※ Panel Cut-Out Form : 71 X 29 mm
POP
Pressure sensor is disconnected.
Check pressure sensor.
PST
Pressure sensor is short-circuited.
Check pressure sensor.
TOP
Temperature sensor is disconnected.
Check temperature sensor.
TST
Temperature sensor is short-circuited.
Check temperature sensor.
Operation State Messages
MOP
Maximum operation pressure is detected.
LOP
Minimum operation pressure is detected.
HSH
Upper limit the degree of superheat is detected.
LSH
Lower limit the degree of superheat is detected.
Electronic expansion valve control unit
FX32EV
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 ④Installation CategoryⅡ
4. 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.
5. Please be understood that if this product is dismantled or modified discretionary, after sales service
will not be able to be provided.
6. 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. (0.50㎟)
7. In order to prevent it from an inductive noise, please maintain the high-voltage wire and power wire
separated.
8. Please avoid installing the product in a place where a strong magnetism, noise, severe vibration
and impact exist.
9. When extending the sensor wire, use a shield wire and do not extend it unnecessary long.
10. The sensor wire and signal wire should be away from the power and load wires using conduits
separately installed.
11. 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)
12. PRODUCT’S DAMAGES OTHER THAN THOSE DECRIBED IN THE GUARANTEE CONDITIONS PROVIDED
BY THE MANUFACTURER SHALL NOT BE RESPOINSIBLE BY US.
Please use this product after attaching double or more safety device without fail if you use this product for
control of equipment which have a big effect on human life or on property (e.g.:nuclear control, medical
instrument, vehicle, railroad, aviation, combustion apparatus, amusement equipment, safety device, etc.)
Temperature Sensor : DPR-PT1K-P6D50L*3m
(unit : mm)
UNIT
STEP
MIN.
MAX.
DEFAULT
USER SETUP
DESCRIPTION
CODE
NO.
DOTECH,INC l http://www.dotech21.com
business@dotech21.com
6F, JOONGANG-ILBO 778 Wonsi-Dong, Danwon-Gu, Ansan-Si,
Gyeonggi-Do, Korea TEL : +82-31-495-3767 / FAX : +82-31-495-3917
Summary of Contents for FX32EV
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