HM226-L Hendon Semiconductors, HM226-L Datasheet
HM226-L
Specifications of HM226-L
Related parts for HM226-L
HM226-L Summary of contents
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... Engineering Sample Information MODULE ASSEMBLY REVISION 5.0 2007 Dec 11 Relay Switching Module with H S ENDON EMICONDUCTORS 1B D UTLER RIVE H SA 5014 ENDON A USTRALIA HM226 - Contact Protection ...
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... QUICK REFERENCE DATA 4 CONNECTIONS AND LAYOUT 5 CIRCUIT DIAGRAMS 6 FUNCTIONAL OVERVIEW 7 CIRCUIT DESCRIPTION 8 HM226 MODULE LOGIC CONTROL 9 HM226 MODULE THERMOSTAT 10 IMPORTANT ELECTRICAL SAFETY WARNING 11 REFERENCES 12 DOCUMENT HISTORY 13 DEFINITIONS 14 COMPANY INFORMATION 15 DISCLAIMER 2007 Dec 11, Revision 5.0 HM226 - Protected Relay Switching Module 2 Engineering Sample Information ...
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... Until now this has prevented their use in thermostats, which require regular switching to maintain the desired temperature. The HM226 uses a triac to conduct the initial and final load current of each relay switching cycle, minimizing relay contact arcing. ...
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... CONNECTIONS AND LAYOUT TOP VIEW 61mm BOTTOM VIEW 2007 Dec 11, Revision 5.0 Protected Relay Switching Module 70mm Fig.1 HM226 PCB connections and layout 4 HM226 - Load Neutral Active Load 0V +5V NTC / Logic Input Load Active Neutral Load Engineering Sample Information ...
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... CIRCUIT DIAGRAMS 2007 Dec 11, Revision 5.0 HM226 - Protected Relay Switching Module 5 Engineering Sample Information ...
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... HM226 - L / Logic Control Schematic 2007 Dec 11, Revision 5.0 HM226 - Protected Relay Switching Module 6 Engineering Sample Information ...
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... This leads to burning, pitting and increased resistance, eventually leading to failure of the contacts. The HM226 all but eliminates arcing of the relay contacts. The IES5541A provides a means for protecting the relay contacts during switching using a small inexpensive triac. ...
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... CIRCUIT DESCRIPTION This section describes the circuit design approach used in application of the IES5541A relay driver IC. In the HM226 there are options to satisfy different application needs and temperature ranges. 7.1 Mains Supply Voltage The HM226 circuit using the IES5541A have been designed for Australian standards, where the normal supply voltage is 230 Volts ...
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... Thermistor/Potentiometer Failure Table As the thermistor is remote from the HM226, there is a possibility that these wires may either short, or may become open circuit. Table 1 below shows the result with such a failure. It also shows what occurs if the wiper on the potentiometer becomes open circuit through contamination from dust etc ...
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... Figure 4. The circuit accepts a 5V logic level input to turn the relay ON and OFF. In Table 2 the parts list of the HM226 Digital Control Module is given. This unit is normally supplied as a fully assembled kit for evaluation purposes. The digital logic control signal is input to the module through the NTC connector. ...
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... In this basic variant of the HM226, a simple thermostat application is described. The application circuit is as shown in Figure 3. The control range with the supplied 100k NTC is 80°C to 180°C. In Table 3 the parts list of the HM226 Temperature Sense is given. This unit is normally supplied as a fully assembled module for evaluation purposes. ...
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... HM226 - T / Thermostat Schematic 2007 Dec 11, Revision 5.0 HM226 - Protected Relay Switching Module 12 Engineering Sample Information ...
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... IMPORTANT ELECTRICAL SAFETY WARNING The HM226 circuit is connected to the mains electrical supply and operates at voltages which need to be protected by proper enclosure and protective covering. While it has been designed to conform to relevant Australian and overseas Standards (such as IEC60335), it should only be used in a manner that ensures the appliance in which they are used complies with all relevant safety and other requirements ...
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... PO Box 2226 Port Adelaide SA 5015 AUSTRALIA Telephone: +61 8 8348 5200 Facsimile: +61 8 8243 1048 World Wide Web: www.hendonsemiconductors.com www.bus-buffer.com Email: hendon.info@hendonsemiconductors.com 2007 Dec 11, Revision 5.0 HM226 - Protected Relay Switching Module Street Address: Hendon Semiconductors 1 Butler Drive Hendon SA 5014 AUSTRALIA 14 Engineering Sample Information ...
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... Customers using or selling Hendon products for use in such applications their own risk and agree to fully indemnify Hendon for any damages resulting from such improper use or sale. 2007 Dec 11, Revision 5.0 HM226 - Protected Relay Switching Module 15 ...