Solid State Relay Heater Control

For heater control these relays enable high precision high frequency temperature control for reflow ovens molding machines and sintering ovens.

Solid state relay heater control. For example if plc output pwm varies from range 0 to 100 then accordingly ssr will control the heater power supply so we can maintain the heater temperature. This can be 1 5 v or more. One problem with triacs and scrs is the voltage drop across them when on. Test results show that zero cross solid state relays in combination with the fast cycle card promote better temperature control and longer heater life than slow cycle relays.

It should tell you the voltage drop. Both low and high voltage solid state relays are available from 24 to 660vac. Ssrs consist of a sensor which responds to an appropriate input control signal a solid state electronic switching device which switches power to the load circuitry and a coupling mechanism to enable the control signal to activate. Through a time proportional cycle rate of 1 10 of a second heater life will be extended.

There are many circumstances in which we need to control a high current voltage load based on the operation of a low power circuit such as when using the 5v output of a microcontroller to turn on a 10a 240v load. With a small dc voltage it can switch high ac currents. For heater control list. For switching a small fridge or 60w heater the current is so low that a heat sink is usually not necessary.

Increased life time of relay and heater. A solid state relay ssr is a digital switch for ac current. Pid controller will generate pwm as per temperature input signal feedback. This article provides an introduction to the basic operation of solid state relays with a focus on the output devices in today s ssrs.

Advantages over electro mechanical relays. No sparking during. Check the datasheet of the scr you are using. Ssrs solid state relays are usually scrs or triacs that are activated via a opto coupler all built into a single package.

If several of these relays are mounted in a control panel ventilation or even cooling of the control panel may be necessary. Models are available with fault detection and cyclic control. Solid state relays are usually mounted on a heat sink to dissipate the heat they generate. Omega engineering created date.

Faster reaction time. Solid state relays for heater control.