2967947

Series:	PLC-OSC
Packaging:	Bulk
Part Status:	Active
Mounting Type:	DIN Rail
Circuit:	SPST-NO (1 Form A)
Output Type:	AC
Voltage - Input:	24VDC
Voltage - Load:	24V ~ 253V
Load Current:	750mA
Termination Style:	Screw Terminal
Package / Case:	Module
Supplier Device Package:	--

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Solid State Relays – the 2967947 Application Field and Working Principle

Solid State Relays, like many other types of relays, are switches that use a control signal to open or close an electrical contact, which then breaks or creates a connection between two points in an electrical circuit. Although Solid State Relays (SSRs) differ in construction and usage to electromechanical relays (EMRs), their functionality is much the same and they are considered to be reliable and cost effective. The particular type of SSR identified by 2967947 is a single-phase optically coupled Solid State Relay. This uses an optical component (usually a light emitting diode or LED) to provide electrical isolation between the switching (input) circuit and the output circuit. Optocouplers are often used to safely control high voltage circuits and eliminate electrical noise.In the case of the 2967947 Solid State Relay, the input circuit is activated when a small voltage (logic level) is applied to the control terminal. This in turn causes a small current to flow through the LED, activating it. The optical energy (light) created is detected by a phototransistor on the opposite side of the optically coupled device. The phototransistor then responds to the light energy of the LED by allowing current to flow between the input and output circuits, thus completing the circuit and switching on the load.The 2967947 Solid State Relay offers a number of advantages over its electromechanical counterparts. Firstly, it has an increased insulation voltage which means that the optically coupled device is capable of switching higher voltages than EMRs. This also eliminates the need for an external power supply for the secondary circuit. Solid State Relays also operate with no contact bounce (no arcing), are less prone to mechanical failure, and have a longer expected life since there are no mechanical components which wear out over time.The 2967947 Solid State Relay is particularly suited for switching small loads (up to 5A) including Home Appliances, Electric Motor Controls, HVAC Systems, Lighting and other consumer electronic applications.Overall, Solid State Relays offer a number of benefits over traditional electromechanical relays and make them a more cost effective and reliable choice. The 2967947 Solid State Relay is no exception, and is a good option for switching low power electronic loads.

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