Item no. 857-304
DC load limit curve
Item no. 857-304
Relay module
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On request
Item no. 857-304
Relay module
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List price per piece*
On request
Price and availability after
Your price per piece*
On request
Prefiltered products
Miniature Switching Relay / Solid-State Relay (857 Series)
Relay modules serve as interface devices that enable the transfer of signals and information between different devices or systems. They act as a bridge, allowing low-powered digital electronics, such as microcontrollers like Arduino or Raspberry Pi, to control high-powered devices like motors or lighting circuits.
What is a relay control module? ›The Relay Control Module interfaces with the Engine/Powertrain Control Module to provide control of the cooling fan(s), A/C clutch and fuel pump, and Main Power Relay.
What voltage does a relay module control? ›A relay module is available in an array of input voltage ratings: It can be a 3.2V or 5V relay module for low power switching, or it can be a 12 or 24V relay module for heavy-duty systems.
What is relay Module 1 channel? ›What is a relay module? The Single Channel Relay Module is a convenient board which can be used to control high voltage, high current load such as motor, solenoid valves, lamps and AC load. It is designed to interface with microcontroller such as Arduino, NodeMCU, etc.
What is the difference between a relay and a relay module? ›Firstly, we need to distinguish between relay and relay modules. A relay module is an array of one or more relays. While it is possible to purchase individual relays separate from the module, we recommend that you purchase them in a module format. This is because it comes with a few advantages.
How can you tell if a control relay is bad? ›To test this, leave your multimeter on the ohms setting and measure the resistance between the switch pins. On a four-pin relay, these are typically labeled 87 and 30. You should see no resistance at all between these pins. If you do, that means that the pins are stuck closed and the relay is bad.
What happens if the ECU relay is bad? ›The Vehicle Won't Stay Running
A bad main relay will sometimes lead to your vehicle not running for very long. If you're able to start the vehicle, it might stop running in a matter of seconds or minutes. The engine will stop running, and your vehicle won't move or start.
12V DC relay switches are the best solution for full voltage applications, as they allow a low current flow circuit to control a high current flow circuit, like a vehicle's horn, headlights, auxiliary lamps, fan motors, blower motors and countless pieces of equipment existing on vehicles today.
Is a relay module input or output? ›Input relay modules connect loads or sensors with microprocessor- or computer-based logic-level systems. Output relay modules convert signals from logic-level control systems to control external loads such as motors, valves, and solenoids.
What kind of device is the Relay Module? Explanation: The Relay Module is a switching device since it's primary function is to switch or change the direction of flow of current or stop it altogether. This way it controls the working of any given circuit.
Why do we need a relay module? ›The primary function of a relay module is to switch electrical devices or systems on and off. It also serves to isolate control circuits, ensuring that low-power devices, such as microcontrollers, can safely control higher voltages and currents.
Where is relay module used? ›Relay modules are widely used in automation systems, industrial machinery, automotive electronics, and home automation. They provide a convenient and efficient way to control devices like motors, lights, and appliances from low-power control signals generated by microcontrollers or other digital systems.
What is the alternative to a relay module? ›SSRs are a nice alternative to mechanical relays but have higher path resistances and are not fully isolated between the contacts. FET switches provide a fast, low-cost solution but have the limitation of only working with low voltages.
What is the basic purpose of a relay? ›The primary purpose of a relay is to protect the electrical system from too high of a voltage or current, allowing the safe operation of any equipment it connects to. They're commonly found in a variety of applications, from commercial and industrial uses to home and consumer products.
What does a relay output module do? ›– A relay module can operate AC or DC loads, or both. – Relays provide electrical isolation between the load and the PLC. – Relays are slow-acting with typical response times of 10 milliseconds or greater. Closed relay contacts are almost zero ohms thus ensuring no voltage loss.
What is a relay responsible for? ›Relays are used wherever it is necessary to control a high power or high voltage circuit with a low power circuit, especially when galvanic isolation is desirable.
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