KURAG ELECTRONICS PLC-24V10AL Manuel utilisateur
PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
TEC (Peltier) Controller
PLC-24V10AL
Reference Manual
(Rev.1.00)
Kurag Electronics LLC
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This reference manual explains detailed functions and advanced usage of the TEC (Peltier)
Controller PLC-24V10AL.
For basic usage, please refer to the quic start manual.
Than you for purchasing the TEC (Peltier) Controller PLC-24V10AL.
Read these operating instructions carefully to ensure effective use of all the performance
this product as to offer, and then use the product properly.
In particular, please be sure to read "Cautions on use" before use.
After reading these operating instructions, be sure to store them in a place where they can
be readily consulted whenever necessary.
Technical support and after-sales service
About support, such as an inquiry about this product, a request for repair, and download of
application software, and after-sale service, it is accepted at the Kurag Electronics website.
Please contact the address listed below.
K RAG ELECTRONICS WEB site: http://kurag.o.oo7.jp/kurag-el/
E-mail (Peltier Controller Support): k[email protected]
PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
Table of content
1. Cautions on use Page 3
2. General Page 4
3. Contents Page 5
4. Names of parts and functions (Main board) Page 6
5. Names of parts and functions (Display board) Page 7
6. Setting and connection Page 8
6-1. Setting of power supply voltage Page 8
6-2. Setting of alarm / protection functions Page 10
6-3. Setting of temperature sensor type Page 11
6-4. Setting of PID control parameters Page 12
6-5. Connection Page 13
6-6. Connection diagram (Single power supply) Page 16
6-7. Connection diagram (Dual power supply) Page 16
7. Operation Page 17
7-1. Basic operation by ey operation Page 17
7-2. Temperature indication of sub temperature sensor Page 17
7-3. Operation procedure of continuous mode Page 17
7-4. Operation procedure of timer mode Page 18
7-5. Operation procedure of loc mode Page 19
8. Alarm / Protect / Indicator functions Page 20
8-1. Alarm functions Page 20
8-2. Reverse protection Page 21
8-3. Indicator function Page 22
9. Specifications Page 23
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PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
1. Caution on u e
✔The use of Kurag Electronics (KE) products with production equipment for the manufacture of
weapons of mass destruction (WMD) or any other weapon is strictly prohibited.
✔The exports of KE products or technology from one country to another are governed by the relevant
security laws and regulation of the countries involved in the transaction. Prior to shipment of KE
product to another country, assure that all local rules governing that export are nown and followed.
✔You agree to comply with all applicable international and national laws that apply to the Product,
including Japanese Export Trade Control Order, as well as end-user, end-use, and destination
restrictions issued by Japanese and other governments.
✔We can bear absolutely no responsibility whatsoever for any direct or indirect damage that may
occur due to the use of this product in your applications.
✔This product is to be used with general industrial product. This product is not designed or
manufactured to be used under such special conditions and environments as nuclear energy control,
aerospace, transportation, medical equipment, various safety equipment or equipment which require
high level reliability related human life. We assume no liability for any direct or indirect damages
that may occur due to applying this product to such equipment or apparatus.
✔If you notice smo e, strange smells or noise coming from the product, cut off the power supply.
Continued use of the product in these conditions will result in fire or electric shoc .
✔If a liquid li e water or foreign objects li e pins and clips which have conductivity adhere to the
product, cut off the power supply immediately. Continued use of the product in these conditions will
result in fire or electric shoc .
✔If the product is dropped or strongly shoc ed or excess power added, cut off the power supply
immediately. Continued use of the product in these conditions will result in fire or electric shoc .
✔When electric power is connected to the product, be careful to apply the proper voltage specified in
the product specification. Improper voltage may cause malfunction or destroy the circuit. Moreover,
please do not use it with the power supply voltage exceeding the rated voltage/current of the Peltier
device to be connected. (A same voltage is supplied to the Peltier device.) Please confirm the
polarity of connections. If a mista e made, regarding polarity, it may result in fire or electric shoc ,
and it may cause malfunction of the product or Peltier device.
✔When you install this product into equipment or wiring the circuit, don’t turn on the power until
wor is completed. A large current flows into wiring of a power supply or a Peltier device. So please
select the wiring material with suitable diameters.
✔Do not operate at temperatures or humidity, etc. beyond the range of specifications.
✔Please do not use it in a dusty place, the place where direct sun beam hit and the environment where
corrosive gases exist. If a dew condensation is generated, you should not use the product until it dries
completely.
✔Never attempt to perform dismantle or modification. And when the product brea s down, do not
repair it by yourself. If the product bro e down, please consult to our support dept.
✔Failure to heed this instruction may cause in fire, electric shoc , personal injury or malfunction.
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PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
1. Caution on u e (continued)
✔Do not touch directly the electrical components which are mounted on the printed wiring board. And
please ta e care not to charge the static electricity to the electrical components.
✔To transport this product, it should be put in the shipping carton, or please put a printed circuit board
into an anti-static bag or a conductive bag, and pac up using suitable shoc absorbing material so
that vibration and a shoc are not added.
✔Dispose of the product according to all national laws and regulations.
2. General
✔PLC-24V10AL-PT and PLC-24V10AL-TH are TEC (Peltier) temperature controller.
✔The differences of the specification from the base model PLC-24V10A are as follows.
Item PLC-24V10A PLC-24V10AL-PT PLC-24V10AL-TH
Main temperature sensor Pt100 / NTC thermistor Pt100 NTC thermistor (*1)
Peltier driving voltage 3V to 24V 7V to 24V(*2)
Temperature range Pt100: -50℃ to 150℃
NTC thermistor: -40℃ to 100℃
-40℃ to 100℃
DC Fan output Direct / 5V fixed / 12V fixed Direct
(*1) NTC thermistor R25 =10 ohm. It is selectable the type of NTC thermistor by using the dedicated setting software.
(*2) Driving voltage depends on supply voltage. It can be driven from 0.5 V for dual power supply operation.
✔High driving current up to 10A by the PWM drive
✔The digital PID control
✔Sub temperature sensor for monitoring (NTC thermistor R25 =10 ohm)
✔Temperature monitoring function (indicator function)
✔DC fan connection terminal with rotational pulse input
✔Continuous operation and timer operation by stand-alone operation
✔Stac able display board for stand-alone operation
✔When an alarm occurs, the cause code of the alarm is displayed on the display board.
✔External control input (Start / Timer) / Parallel output (Indicator / Alarm)
✔Operation loc function to prevent mis-operation
✔Same form factor (same dimension) as previous model of PLC series (PLC-24V6A, etc.)
✔RS-232 serial communication port
✔It is possible to control from the personal computer by using RS-232 serial command.
✔Free control software and setting software are available from Kurag Electronics website.
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PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
3. Content
Listed items are included in this product pac age.
Please chec that these items are included.
Name Main board Display board Main with display
PLC-24V10AL Main Board ✔ ✔
PLC-24V10A Display Board ✔ ✔
RS-232 Cable ✔ ✔
Quic Start Manual ✔ ✔ ✔
Main board Display board
RS-232 cable
* JST XHP-3 to Dsub 9 pin Cable length = 100mm
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PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
4. Name of part and function (Main board)
1. Power supply terminal
The range of supply voltage is DC 7V to 24V (single power supply).
2. TEC (Peltier) element terminal
3. Sub temperature sensor terminal
4. Main temperature sensor terminal
5. / 6. Connectors to Display Board
7. DC fan terminal
DC fan terminal for heat sin ing. (up to 500 mA)
The same voltage as power supply voltage can be outputted for a standard product.
The fixed voltage of 5V or 12V can be outputted for a customized product.
8. A connector for a RS-232 communication cable
Connector to connect an attached RS-232 cable for external control.
9. The connector for factory use (no part is mounted)
10. / 11. A terminal for external control (START / TIMER)
A start/stop of temperature control operation and timer operation are controllable by
connecting and switching on and off for these terminals.
12. / 13. Parallel output (INDICATOR / ALARM)
Open collector outputs to notify the indicator and alarm status.
14. / 15. Status LED lamps (R N / ALARM)
LED lamps to display the product operation status.
14. RUN: Turn-on during control operation. Blin ing during reverse protection
15. ALM; Blin ing when alarm occur. Turn-on during temperature indicator wor s.
* When the display board is connected, these LED lamps are turned-off.
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PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
5. Name of part and function (Di play board)
1. / 2. Connectors to Main Board
The connectors combine a display board with a main board.
3. / 4. / 5. Operation status LED lamps
These LED lamps display the product operation status.
3. The temperature control is at wor : Lights up “RUN” (GREEN)
4. The heater mode is at wor : Lights up “HEAT” (RED)
5. The cooler mode is at wor : Lights up “COOL” (GREEN)
6. Alarm LED lamp
When alarm occurred, blin s “ALARM” (RED) and the operation is stopped.
7. / 8. / 9. Display status LED lamps
These LED lamps display the content of 7 segments LED displays. It blin s during
a setting and lights up continuously after decision or during display.
7. Display the temperature: Lights up “TEMP.” (YELLOW)
8. Display the time (unit: minute): Lights up “MIN.” (YELLOW)
9. Display the time (unit: hour): Lights up “HOUR.” (YELLOW)
10. 7 segment LED (4 digit)
This LED displays the temperature or time.
11. MODE key 12. DOWN key 13. P key 14. SET key
These eys are for setting of temperature or timer operation.
15. Operation switch
Position of switch is upper side ON: Start
Position of switch is lower side OFF: Stop
SW1: Start/Stop the continuous operation.
SW2: Start/Stop the timer operation.
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PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
6. Setting and connection
6-1. Setting of power upply voltage
This product uses PWM drive. The drive circuit is configured as shown below.
This figure shows the state when driving in the cooling direction. A switching element of a full
bridge configuration (actually a semiconductor switch element) by switching on / off the
polarity of the Peltier drive output and performing PWM modulation, temperature control is
carried out. Since the voltage drop of the switching element and current detection circuit is very
small, the driving voltage “VPD” of the Peltier element is almost equal to the power supply
voltage “VP”.
* In this product, the filter circuit is not included in the Peltier drive output, so during PWM
drive a pulse whose voltage is almost equal to the power supply voltage VP is applied to the
Peltier device.
The equivalent circuit when voltage is applied to the Peltier element is as shown below.
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VPD: Peltier driving voltage
IPD: Peltier driving current
RP: Internal resistance of Peltier
VSB: Thermo-electromotive force due to Seebec effect
* VSB increases as the temperature difference between
the heat absorption surface and the heat radiation
surface of the Peltier element increases.
PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
Peltier driving current IPD is calculated by the following formula.
IPD=(VPD-VSB)/RP
The voltage of the Peltier drive power supply (VP) is needed to set to satisfy the following
conditions (1) to (3).
(1) VP ≈ VPD ≤ Vmax (Vmax: maximum voltage of the Peltier element)
(2) IPD = (VPD - VSB) / RP ≤ Imax (Imax: maximum current of the Peltier element)
In case that temperature control is always performed at a constant temperature, when VSB = 0
in equation (2), IPD is the maximum. When there is no temperature difference between both
surface (for example at the start of temperature control), VSB will be “0”.
(2-1) IPD = VPD / RP ≤ Imax -> VPD = IPD x RP ≤ Imax x RP
When repeating cooling / heating, at the moment the driving polarity reverses, the polarity of
VSB becomes reverse polarity as the polarity of VPD, IPD will be increased.
(2-2) IPD = (VPD + VSB) / RP ≤ Imax -> VPD = IPD x RP - VSB ≤ Imax x RP - VSB
* By using the drive reversal protection function, excessive current flows in the Peltier element
when the drive polarity reverses It can prevent flowing.
For details, please refer to "8-2. Drive reversal protection function" in this document
In addition, the power supply voltage range restricted by the specifications of this product is as
follows.
(3-1) 7V ≤ VP ≤ 24V (Single power supply)
(3-2) 0.5V ≤ VP ≤ 24V (Dual power supply)
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PLC-24V10AL Reference Manual (Rev.1.00) Kurag Electronics LLC
6-2. Setting of alarm / protection function
For alarm / protection function, use the dedicated setting software "PLC-24V10A Manager"
You can enable / disable and set alarm detection judgment value by using.
* For the display of the cause code of the alarm, please refer to "8-1. Alarm function"
The following table shows the guidelines for describing and setting each alarm / protection
function.
Name Description Guideline
Temperature sensor
(Main sensor)
An alarm occurs when the main temperature
sensor is not connected or disconnected.
It is recommended to set it to “ON” (Enable).
Temperature sensor
(Sub sensor)
An alarm occurs when the sub temperature sensor
is not connected or disconnected.
When the sub temperature sensor is used, it is
recommended to set it to “ON” (Enable).
Power supply An alarm occurs when the power supply voltage is
out of the preset reference range.
It is normally “OFF” (Disable) and it is no
problem. When the power supply voltage is
changed dynamically, set it to “ON” (Enable).
Peltier current An alarm occurs when the Peltier current is out of
the preset reference value range.
It is recommended to set it to ON (Enable).
Please set the lower limit to 1/10 to 1/5 of the
normal current of the Peltier element.
Please set the upper limit to less than the
maximum current (Imax) of the Peltier element.
Fan stop When using DC fan with pulse sensor (3 wire
type), rotation pulse from fan is not detected about
5 seconds or more, an alarm occurs.
If you do not connect a DC fan with a pulse
sensor, set it to OFF (Disable).
Peltier polarity An alarm occurs when the temperature control
operation is continued with the polarity of the
Peltier element reversely connected
If the Peltier element is connected to the correct
polarity, it is normally OFF (Disable) and there is
no problem.
Reverse protection When the drive polarity is reversed, the
temperature control operation is temporarily
stopped, and the Peltier element is protected from
over current. (It restarts automatically)
In case of repeating cooling / heating, turn ON
(Enable) when power supply voltage VP can not
satisfy the condition of (2-2) of “6-1. Setting of
power supply voltage”.
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