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WHY56ND TEMPERATURE CONTROLLER

CERTIFICATION AND WARRANTY

CERTIFICATION

Wavelength  Electronics,  Inc.  (Wavelength)  certifies  that  this 

product met its published specifications at the time of shipment. 

Wavelength further certifies that its calibration measurements are 

traceable to the United States National Institute of Standards and 

Technology, to the extent allowed by that organization’s calibration 

facilities, and to the calibration facilities of other International 

Standards Organization members.

WARRANTY

This Wavelength product is warranted against defects in materials 

and workmanship for a period of one (1) year from date of shipment. 

During the warranty period, Wavelength will, at its option, either 

repair or replace products which prove to be defective. 

WARRANTY SERVICE

For warranty service or repair, this product must be returned to the 

factory. An RMA is required for products returned to Wavelength 

for warranty service. The Buyer shall prepay shipping charges to 

Wavelength and Wavelength shall pay shipping charges to return 

the product to the Buyer upon determination of defective materials 

or  workmanship.  However,  the  Buyer  shall  pay  all  shipping 

charges, duties, and taxes for products returned to Wavelength 

from another country.

LIMITATIONS OF WARRANTY

The  warranty  shall  not  apply  to  defects  resulting  from  improper 

use or misuse of the product or operation outside published 

specifications.  No  other  warranty  is  expressed  or  implied. 

Wavelength  specifically  disclaims  the  implied  warranties  of 

merchantability and fitness for a particular purpose. 

EXCLUSIVE REMEDIES

The remedies provided herein are the Buyer’s sole and exclusive 

remedies. Wavelength shall not be liable for any direct, indirect, 

special, incidental, or consequential damages, whether based on 

contract, tort, or any other legal theory.

REVERSE ENGINEERING PROHIBITED

Buyer, End‑User, or Third‑Party Reseller are expressly prohibited 

from  reverse  engineering,  decompiling,  or  disassembling  this 

product.

NOTICE

The information contained in this document is subject to change 

without notice. Wavelength will not be liable for errors contained 

herein or for incidental or consequential damages in connection 

with the furnishing, performance, or use of this material. No part of 

this document may be translated to another language without the 

prior written consent of Wavelength.

SAFETY

There are no user‑serviceable parts inside this product. Return the 

product to Wavelength Electronics for service and repair to ensure 

that safety features are maintained.

LIFE SUPPORT POLICY

This  important  safety  information  applies  to  all  Wavelength 

electrical and electronic products and accessories:

As  a  general  policy,  Wavelength  Electronics,  Inc.  does  not 

recommend the use of any of its products in life support applications 

where  the  failure  or  malfunction  of  the  Wavelength  product  can 

be reasonably expected to cause failure of the life support device 

or  to  significantly  affect  its  safety  or  effectiveness.  Wavelength 

will  not  knowingly  sell  its  products  for  use  in  such  applications 

unless it receives written assurances satisfactory to Wavelength 

that  the  risks  of  injury  or  damage  have  been  minimized,  the 

customer assumes all such risks, and there is no product liability 

for Wavelength. Examples of devices considered to be life support 

devices  are  neonatal  oxygen  analyzers,  nerve  stimulators  (for 

any  use),  auto‑transfusion  devices,  blood  pumps,  defibrillators, 

arrhythmia detectors and alarms, pacemakers, hemodialysis 

systems, peritoneal dialysis systems, ventilators of all types, and 

infusion pumps as well as other devices designated as “critical” 

by the FDA. The above are representative examples only and are 

not intended to be conclusive or exclusive of any other life support 

device.

REVISION HISTORY

DOCUMENT NUMBER: WHY56ND‑00400

REV.

DATE

CHANGE

A

January 

2022

Initial Release

WAVELE

n

GTH

 

E L E C T R O N I C S

51 Evergreen Drive

Bozeman, Montana 59715

406‑587‑4910  (tel)

406‑587‑4911  (fax)

Sales & Tech Support

[email protected]

[email protected]

Summary of Contents for WHY56ND

Page 1: ...upply Low Cost 0 005 C Stability typical Linear PI Temperature Control High 2 2 A Output Current Control Above and Below Ambient Master Booster Operation Temperature Setpoint Heat and Cool Current Lim...

Page 2: ...sit the Wavelength Electronics website for the most accurate up to date and easy to use SOA calculator www teamwavelength com support design tools soa tc calculator Figure 1 shows the pin layout and d...

Page 3: ...electric Cooler TEC or resistive heater connected directly to Pin 9 and Pin 13 on the controller as shown in Figure 3 NOTE Use a max of 5 V power supply with the test load shown Values shown can simul...

Page 4: ...on for the sensor RT and setpoint RS resistors 8 VDD Control Electronics Supply Input Power supply input for the WHY56ND s internal control electronics Supply range input for this pin is 5 to 26 VDC 9...

Page 5: ...Negative Temperature Coefficient thermistors OUTPUTA provides the heating current to the TEC for NTC sensors Connect OUTPUTA to the positive thermoelectric terminal when using Positive Temperature Co...

Page 6: ...o Pin 13 Full Temp Range IS 100 mA VS 0 7 VS 0 5 V Compliance Voltage Pin 9 to Pin 13 Full Temp Range IS 1 A VS 1 2 VS 1 0 V Compliance Voltage Pin 9 to Pin 13 Full Temp Range IS 2 A VS 1 6 VS 1 4 V P...

Page 7: ...tes directly with thermistors or RTD temperature sensors The fundamental operating principle is that the controller adjusts the TEC drive current in order to change the temperature of the sensor that...

Page 8: ...TRUCTIONS STANDALONE NECESSARY EQUIPMENT The following equipment is required to configure the WHY56ND for basic operation WHY56ND Temperature Controller Thermistor or other temperature sensor Peltier...

Page 9: ...6 7 Use one of the sensors in the sections listed below SENSOR SELECTION Select a temperature sensor that is responsive around the desired operating temperature The temperature sensor should produce...

Page 10: ...th reference to Pin 1 AGND If the setpoint resistor RS is larger than the RTD resistance RRTD then the control loop will produce a heating current since the temperature sensed by the RTD is below cool...

Page 11: ...alues can be fine tuned experimentally Start with component values from Table 5 and operate the temperature controller system to determine if the load temperature settling time is satisfactory If it i...

Page 12: ...to Pin 1 AGND with a 1 5 k resistor when using RTDs LM335 type and AD590 type temperature sensors with a resistive heater Connect the resistive heater to Pins 9 and 13 to operate INCREASING OUTPUT CU...

Page 13: ...OLLERS 3 WHY56ND CONTROLLERS 4 WHY56ND CONTROLLERS 5 WHY56ND CONTROLLERS CURRENT LIMIT SET RESISTOR K RA RB 0 0 0 0 0 1 60 0 1 0 2 0 3 0 4 0 5 1 69 0 2 0 4 0 6 0 8 1 0 1 78 0 3 0 6 0 9 1 2 1 5 1 87 0...

Page 14: ...unit will be operating within the internalheat dissipation Safe Operating Area SOA STEP 1 INSTALL WHY56ND ON THE WHY56ND EV WITH HEATSINK AND FAN Match up the notch Figure 12 on the WHY56ND with the...

Page 15: ...Electronics to use the WHY56ND EV with other sensors or ranges STEP 5 ATTACHING THE VDD AND VS POWER SUPPLIES Ensure that the controller can be safely operated by checking the SOA Calculator website...

Page 16: ...board toggle switch The output is enabled when the green ON LED indicator is lit NOTE Before enabling the output make sure the RUN SET switch is set to the RUN position When enabled with this switch i...

Page 17: ...re configuration may be different than shown Fan can be rotated on the WHY so the location of the wires matches custom PCB WHY56ND and WHY56ND EV assembly instructions Figure 15 Match up the notch sho...

Page 18: ...perating thermistor resistance RT For example for a 10 k thermistor operating at 25 C choose R1 to be 20 k NOTE Pin 9 OUTA is the heating current sink and Pin 13 OUTB is the cooling current sink Figur...

Page 19: ...S given a desired operating temperature measured in Celsius Rs 2R3 0 5 273 15 TCelsius 1mV K 10 Resistor R3 is a fixed resistance value that can be used to scale or adjust the setpoint resistor RS Sel...

Page 20: ...W 3 Heatsink and 3 5CFM fan required 2 W PWHY 9 W 4 Unsafe Operating Area PWHY Power internally dissipated in the WHY56ND 1 2 3 4 5 10 15 20 25 0 0 0 5 1 0 1 5 2 0 Voltage Drop Across WHY VS VLOAD V...

Page 21: ...VDD VDD VDD VDD VS D1 GREEN VDD VS VDD VS S1 SPST LIM B LIM A SGL TURN SGL TURN CCW 0 AMPS CW 2 AMPS SGL TURN P GAIN I TERM OUT A OUT B SENSOR SENSOR VM1 VM2 VDD VS PGND COMMON OUTA OUTB LIMB LIMA VM2...

Page 22: ...e at 25 C a 10 k thermistor has a sensitivity of 43 mV C whereas an RTD sensor has a sensitivity of 4 mV C Proportional control term may be set too high Reduce the value of the proportional term For m...

Page 23: ...24 0 2 PLS 4 40 UNC Airflow Direction MECHANICAL SPECIFICATIONS 0 040 1 02mm Dia Thru Hole 0 060 1 5mm Dia Pad 4 Required All Tolerances are 5 unless noted WEIGHTS WHY56ND 0 6 oz WHS302 Heatsink 0 5...

Page 24: ...M A FAN COM VM2 VM1 CW 2 AMPS CCW 0 AMPS LIM B OUTPUT A SENSOR RUN RSET CW Incr CCW Decr sec I TERM PGND VS VDD OFF ENABLE ON WAVELENGTH ELECTRONICS For use with WHY56ND CW Decr CCW Incr P GAIN SET 2...

Page 25: ...UE PGND 2 ORANGE VS 3 RED VDD 4 BLACK COM 5 WHITE VM1 6 GREEN VM2 CABLING SPECIFICATIONS These cables are included with the WHY56ND EV Evaluation Board WTC3293 00101 INPUT CABLE MOLEX 43645 0400 MICRO...

Page 26: ...prohibited from reverse engineering decompiling or disassembling this product NOTICE The information contained in this document is subject to change without notice Wavelength will not be liable for e...

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