relay module pin diagram

9. 2. How to Use a Relay? I have an inverter that doesn’t charge batteries, so I built an external 40A battery charger for my batteries.. The other two pins are on the opposite side of the structure. 1. I have connected the receiving Lora module with Arduino Nano as per the receiving Lora circuit diagram. Thank you very much. connect the Vcc and GND pins of the relay module to the Arduino's 5 volt pin and gnd pin. thank you. **Since there is only 1 NO pin, there will be only 1 NC pin in the connected pins.Thus, the other 2 remaining pins in the connected pins must be common pins. Description. Relays that normally used in electronic circuits are SPDT and DPDT types due to their flexibility in controlling circuit switching. I’m gonna to connect 6 pcs of 4-channel to Arduino Mega 2560 R3. **The relay (SRC-05VDC-SH) is a double pole double throw (DPDT) type relay. So, connect the NodeMCU’s Vin pin to 5V and one of the GNDs to ground of the input side power supply. Next, increase the output voltage by slowly turning the voltage adjusting coarse knob only in clockwise direction until a “click” sound emitted by the relay is heard (means that the relay is activated). Figure 1: Various normal designations of relay. After going through above demonstrations, users must have became familiar with the ways or steps to determine the terminal pins of a relay even though there is no datasheet for reference. 1. A 5-pins type relay,… However young electronic enthusiasts often become confused while assessing the pin outs of the relay and configuring them with a drive circuit inside the intended electronic circuit. Honestly, we also have been noticed that relay 4 pin wiring diagram is being one of the most popular field right now. Figure 19: The part of product code indicates relay activation voltage. If a relay is 10a / 250 . The following simulation shows how a typical relay may be wired with a DC voltage source across its coils and a mains AC load across its N/O and N/C contacts. Three pins are at one side of the structure. Weather Display on e-Paper Using Raspberry Pi, Interfacing e-Paper Display Using Raspberry Pi, Digital Maker Marketplace @ Malaysia, Singapore​, Communicate in between BBFuino and SK28A by using RF-TRX-2.4G, Getting Started? Even in 2016 this is still usefull. In this case, although the activation voltage stated is DC 12V, the activation voltage recorded is about 3.4V which is lower. Careful for misplaced connections. Figure 23: The distribution of terminal pins of relay (SRC-05VDC-SH) as determined. It has 6 pins: IN1, IN2, IN3, IN4, Vcc and GND. The polarity of the voltage does not matter. The following diagram shows how the above relay may be wired with a load, such that when the coil is energized, the load gets triggered or switched ON through its N/O contacts, and through the attached supply voltage. **In this part, the coil pins of the relay (TRB-12VDC-SB-CL) have no polarity marked on them since internal suppressing diode is not available. Let’s set up our relay module to switch on a lamp. And when the relay coil is switched OFF, the pole disconnects itself from the N/O (Normally Open) terminal and joins itself with a second terminal called the N/C contact. Pin Name. This part name is SRDVDC-SL-C. Generally speaking, a relay contains an induction part which can reflect input variable like current, voltage, power, resistance, frequency, temperature, pressure, speed and light etc. The following diagram shows how the above relay may be wired with a load, such that when the coil is energized, the load gets triggered or switched ON through its N/O contacts, and through the attached supply voltage. Connect the digital pin #6 to the IN1 input pin for controlling the first relay. Here voltage divider is not required as Arduino can receive signal at 3.3v logic level from the receiving Lora module … 3. A relay is an electrically operated device. Then, connect the output terminal of DC power supply across the coil pins of the relay using crocodile clips. Now, all the pins of relay have been determined as in Figure 9 below. The central pole is hinged or pivoted in such a way that when the relay coil is powered with voltage, the central pole joins with one of the side terminals of the device called the N/O contact (Normally Closed). Since the coil pin pair is found. Since the common pin is determined, thus another one remaining pin in the connected pins detected in step 3 must be the normally closed (NC) pin. found via a google search and exactly what I was looking for! We would greatly appreciate your expertise on this. Figure 17: Overview of the relay (SRC-05VDC-SH), Figure 18: Coil pins of the relay is determined (in this case, the coil resistance is 127 ohm). Relay Terminals Relay Wiring Diagrams SPDT Relay Wiring Diagram. Without seeing the schematic or the pin diagram of the relay it may be difficult to judge its operational details, https://www.youtube.com/watch?v=EnhSJ-Nq14Q&t=8s, Previous: 4 Simple Motion Detector Circuits using PIR, Next: 7 Simple Inverter Circuits you can Build at Home. Bosch 5 Pin Relay Wiring Diagram– wiring diagram is a simplified satisfactory pictorial representation of an electrical circuit.It shows the components of the circuit as simplified shapes, and the power and signal connections amid the devices. **In this case, 3 pins are found connected. The two additional pinouts are terminated with the coil of the relay. There are two important parameters of relay, first is the Trigger Voltage, this is the voltage required to turn on the relay that is to change the contact from Common → NC to Common → NO. first download the relay.ino file then open with your Arduino. COM- Common pin NC- Normally Closed, in which case NC is connected with COM when INT1 is set low and disconnected when INT1 is high An electrical relay consists of a electromagnet and a spring loaded changeover contacts. ... All you need to do is to control the GPIO pins connected to the Relay Module. Thanks to this article, I think I now understand what a relay does, thank you! Connect the digital pin #6 to the IN1 input pin for controlling the first relay. Relays are used where it is necessary to control a circuit by a separate low-power signal, or where several circuits must be controlled by one signal. We know that most of the high end industrial application devices have relays for their effective working. Now I assume the jumpers allows the relay module to take power from the VCC of the main pin block. The main concept of Home Automation using Raspberry Pi (or any other platform like Arduino) is to control different electrical loads using Raspberry Pi. 2 Relay Module Output Pins. VCC pin is connected to the 5V power supply, GND pin is connected to the GND, and the input pin is connected to the digital I/O pin. Learn how to use relay with Arduino, how relay works, how to connect relay to Arduino, how to code for relay, how to program Arduino step by step. Hi, Swagatam. For demonstrating the working of this Relay Module, we have used an Arduino Uno board for controlling relays. This is the default position of the contacts, and happens due to the absence of an electromagnetic force, and also due to the spring tension of the pole metal which normally keeps the pole connected with the N/C contact. Your email address will not be published. In the receiver Lora circuit, I have used Arduino digital pin D8, D9, D10, D11, D12 to control the 12v relay module. This is the best explanation ever, thanks you. I have explained this smart relay module circuit in the tutorial video of this home automation project. However for greater safety you can use 1 watt diodes which will be more than enough. Just wanted to say thanks for a great tutorial on relays.The explanations,animations and pics helped this beginner grasp relay concept and uses.Keep up the good work. Relay module for Arduino is one of the most powerful application for Arduino as it can be used to control both A.C and D.C devices by simply controlling the relay by giving 5V. Find this and other Arduino tutorials on ArduinoGetStarted.com. 10. The above simple procedure could be applied for identifying any relay pinout which may be unknown to you, or unlabelled. The required activation voltage for the relay can be determined from its product code. When the coil is energized the generated electromagnetic field instantly pulls the nearby spring loaded pole metal implementing the above explained switching of the contacts. In most Arduinos the power will be 5V, in a Raspberry Pi it will be 3.3V - but these relay modules will work OK with 3.3V even though they are officially rated at 5V. ESP32 Schematic Diagram. Hence, the 3rd pin must be the normally open (NO) pin. Other pins approximately also at this values. These modules have the circuitry described above built-in so you don't need to add it - that's only needed if you are driving a stand-alone relay directly. Find this and other Arduino tutorials on ArduinoGetStarted.com. Aug 30, 2016 - In this tutorial we will learn how to control high voltage devices with Arduino and a relay module. Relay Pins. In this case, although the activation voltage stated is DC 12V, the activation voltage recorded is about 7.5V which is lower. **Some relays may have internal suppressing diode installed across its coils  for protection purpose. In summary, small currents and voltages provide greater current and voltage control. Solid State Relay Module, TRIAC, SCR . 2 relay module pin functions are listed in … This happens because the pole iron gets attracted by the relay coil electromagnetic pull. . This supply voltage in series with the load may be as per the load specifications. There are some designations normally used in describing a relay based on its internal structure and pins distribution as shown in the following: i) Single Pole Single Throw (SPST) – Such relay has 4 terminal pins which consists of a pair of coil pins and a pair of pins which can be made connected or disconnected by activating or deactivating the relay. Equivalent Relays. Normally, for this kind of relays, the location of the coil pins will be marked as well as their polarity to prevent any mistaken connection that could destroy the relays that have been made. **Since there is only 1 NO pin, there will be only 1 NC pin in the connected pair. Thus basically there are three contact pinouts for a relay, namely the central pole, the N/C and the N/O. Based on this finding, the remaining pins must be normally open (NO) pins. 2. These N/C and N/O contacts also have end terminations which move out of the relay box to form the relevant pinouts of the relay. I came to this page looking how to hook up the relay (just the component, so this post doesn’t help me much). Start by connecting VCC pin on the module to 5V on the Arduino and GND pin to ground. Based on this finding, the remaining pins must be normally open (NO) pins. Figure 15: Determine the common pin of the relay when the relay is activated. It is frequently used in automatic control circuit. 8. For Arduino boards. The other two contacts N/C and the N/O form the associated complementary pairs of relay terminals or the pin outs which alternately get connected and disconnected with the central relay pole in response to the coil activation. Since the common pins are determined, thus another one remaining pin in the connected pins detected in step 3 must be the normally closed (NC) pin. A positive and. Description: Relay Wiring regarding Relay 4 Pin Wiring Diagram, image size 609 X 457 px, and to view image details please click the image.. Both IN1 and IN2 comes from the micro-controller (Arduino UNO in this case). Arduino 2 Channel Relay: This instructable is for connecting your Arduino to a 2 Channel relay module and using your sketch to control the switches.I bought the 2 Relay Module on eBay (for $9.50) to drive a couple of 240V parts (a vacuum cleaner and a rotary engraving tool)… 5V Relay Pin Diagram [Click the image to enlarge it] Relay Pin Configuration. that’s an excellent explanation.thank you very much! NC (Normally Closed): the normally closed configuration is used when you want the relay to be closed by default.The NC are COM pins are connected, meaning the current is flowing … Based on this finding, the remaining pins must be normally open (NO) pins. Optocoupler is a component that transfers electrical signals between two state of isolation circuits by using light, and prevent high voltage from affecting the system receiving the signal. I have the image of the pin outs diagram for the BC548 transistor. **Then, hinging on this basis, 03VDC would indicate that the activation voltage is DC 3V, 12VDC means an activation voltage of DC 12V and so on. Relay Module Library. Related Resources. Then connect the signal pin of the relay module with the pin 12 of the Arduino. The typical usage of relay is to allow a low DC voltage circuit (circuit #1) to switch on or off a high voltage (DC or AC) circuit (circuit #2) without direct electrical connection between them. Glad you liked leo, appreciate you feedback! Arduino output pin can only source/provide 40mA. I am also the founder of the website: https://www.homemade-circuits.com/, where I love sharing my innovative circuit ideas and tutorials. i appreciate you for your effort. Connect one of your I/O pins (in output mode) to IN1 and the value on that I/O pin will control Relay #1. The Arduino Relay module allows a wide range of microcontroller such as Arduino, AVR ,PIC, ARM with digital outputs to control larger loads and devices like AC or DC Motors, electromagnets, solenoids, and incandescent light bulbs. 1. We had a simple switch setup with on/off, so we left the blacklight on all day (controlled with simple lamp timer to turn off when we were closed) and put the “normal” light on the on/off switch, so when the switch was ON, the white light interfered with the UV and the scorpions looked black, and when OFF you could see the scorpions’ fluorescence under the blacklight. The 120-240V supply current enters the relay at the common (C) terminal in both configurations. In this video I show you how to wire a 12 volt automotive Bosch style relay. An external electrical load connected across these contacts are subsequently switched ON/OFF in response to relay electromagnet switching. The following are the major components present on a relay module; we will get into the details later in this article. These pins of the relay would signify the coil pinouts of the relay. 5. **In this case, there is only 1 pair of pins found connected. This is really useful for me to understand how to identify a relay. Connect the components based on the figure shown in the wiring diagram using M-M and F-F pin connectors. So, connect the 5V and the ground of the Arduino with the 5V and the ground of the relay module. I have also made a relay pin configuration diagram. The ATMEGA328P microcontroller is used to control the 5 channel relay module. Make Your Own Colourful Plate for Your Home, 4x4x4 LED Cube using Arduino UNO without extra IC. I’ll try to figure out a suitable solution once I get these details. 6) In most cases the central pinout from this triangular configuration would be your relay pole, the N/C is already identified and therefore the last one would be your relay's N/O contact or pinout. Whether it’s for flashing a lamp, for switching AC motor or for other similar operations, relays are for such applications. Connect a second I/O pin to IN2 to control Relay … Learn how to use relay with Arduino, how relay works, how to connect relay to Arduino, how to code for relay, how to program Arduino step by step. Figure 16: The distribution of terminal pins of relay (TRB-12VDC-SB-CL) as determined. Your email address will not be published. **Other pin pairs will show either zero resistance or infinite resistance. 12 Volt Relay Wiring Diagram - Collections Of Best Relay Wiring Diagram 5 Pin Bosch Endearing Enchanting Blurts. Usually we just use a lamp timer to set the daytime hours the normal light is on (for viewing & to give animal day/night cycle), so bonus if the system can work with that, or incorporate the day/night cycle as well. Aug 30, 2016 - In this tutorial we will learn how to control high voltage devices with Arduino and a relay module. After having a discussion on the 5V single channel relay module pinout and its working, now let’s proceed to its working and see how to activate and deactivate relay module by applying a digital signal to control pin of single-channel relay module. Log In with Google. How to Set Up a 5V Relay on the Arduino. Hi Louis, since the current rating of the relay coil is only 5.1 mA, any standard zener (400mW) should work. Connect the Vcc and GND pins of the relay module to the Arduino's 5 volt pin and GND pin. 5V isolation relay module M-M pin connectors F-F pin connectors Breadboard USB cable 1. How to Use Resistors with LED, Zener and Transistor, TL494 Datasheet, Pinout, Application Circuits, Transistor Stray pickup False Triggering Problem, P-Channel MOSFET in H-Bridge Applications, High Voltage Transistor MJ11021(PNP) MJ11022 (NPN) Datasheet – Complementary Pair, 3 Terminal Fixed Voltage Regulators – Working and Application Circuits, Small Signal Transistor(BJT) and Diode Quick Datasheet. The coil of the relay which is wound over an iron core behaves like a strong electromagnet when a DC is passed through the coil. Let’s set up our relay module to switch on a lamp. We have a standard 1N4002 diode across the relay coil as a snubber, which works just fine. **Only the relay coil pin pairs will show non-zero resistance value. **More often that not, the activation voltage relay may be less than what is stated in the product code during the real test as long the voltage applied is sufficient to establish a magnetic field that is able to attract movable lever to normally open (NO) pin so that a connection between a normally open (NO) pin and common pin is established. Last Updated on June 1, 2020 by Swagatam 15 Comments. 10. It’s easy to DIY your smart switch to any device by your phone anywhere with this smart relay.SpecificationsW… This is one of the semiconductor types. I have noticed you don’t monetize your blog, don’t Therefore in all we have 5 pinouts in an SPDT relay: the central movable or switching terminal, a pair of N/C and the N/O terminals and finally the two coil terminals which all together constitute a relays pin outs. For demonstrating the working of this Relay Module, we have used an Arduino Uno board for controlling relays. couldnt find pinout for my relay, very well explained and you made it very easy to follow.very good job. 5V and GND and connect the control signal from Arduino to control pin on the relay board. You’ll also need to place the relay module in line with the AC powered device (lamp in our case) you’re attempting to control. The required activation voltage for the relay can be determined from its product code. very good job. Normally Open relays are the more common type. Most relay modules (whether 5V or 12V) will come with the aforementioned connection and hence all you need is to give power supply to the relay module i.e. 7. Hence, the 5th  and 6th pins must be the normally open (NO) pins. Typically this may be anything between 100 ohm and 500 Ohm. 4. 5V and GND and connect the control signal from Arduino to control pin on the relay board. The relay module shown in the previous photo has two connectors, each with three sockets: common (COM), Normally Closed (NC), and Normally Open (NO).COM: connect the current you want to control (mains voltage). Then, connect the output terminal of the DC power supply across the coil pins of the relay using crocodile clips. These: Thermal overcurrent relay Magnetic overcurrent relay. Since the common pins are determined, thus another one remaining pins in the connected pins detected in step 3 must be the normally closed (NC) pins. Required fields are marked *. Once you find it you can easily configure it for the required changeover and switching. Set your multimeter to continuity test mode.Try to touch the probes of multimeter on remaining pins to determine which are the pins actually connected to each other.These pins actually consist of normally closed (NC) pin/pins and common pin/pins. Careful for misplaced connections. Since the common pin is determined, thus another one remaining pin in the connected pins detected in step 3 must be the normally closed (NC) pin. thanks sir. **In this part, the coil pins of the relay (SRC-05VDC-SH) have no polarity marked on them since internal suppressing diode is not available. Relays are most commonly used switching device in electronics. can the load of a 220v 40w x 20 lamp be used? Used to trigger(On/Off) the Relay, Normally one end is connected to 5V and the other end to ground. 3. Next, increase the output voltage by slowly turning the voltage adjusting coarse knob only in clockwise direction until a “click” sound emitted by the relay is heard ( this means that the relay is activated). A lot, I 'll be most happy to help you realize controlling your other devices.... Back to the project of how to relay module pin diagram pin on the Arduino and GND and connect the digital pin 6. Other devices remotely jumpers allows the relay module to switch on a lamp check if it is:! Other end to ground of the moving, stability, long-term reliability and small volume we use cookies to that... Switch which is lower of methods for working with a digital relay module has three ( 3 ) pins! This pole our relay module M-M pin connectors digital pin # 6 the. On Soldering Breakoutboards to the Micro Metal Gearmotor! other pin pairs show! Terminated as the pinout of this relay module to switch on and switch OFF operations it switches N/C. This demonstration I know very very little about circuitry me to understand how to calculate load! Has 6 pins: IN1, IN2, IN3, IN4, VCC GND. X 20 lamp be used in electronic circuits of many different c… Equivalent relays having trouble deciding power. Be more than 4 amps I/O pin to ground me Determine the pins of (! Arduino UNO without extra IC on whether you want the 5V and GND pin to ground like a light or. Module to switch on a lamp, for switching AC motor or for other similar operations relays. Namely the central pole, the activation voltage for the BC548 transistor coil electromagnetic.. Basically there are only 6 remaining pins to Determine which are the pins of the input power. Such home automation project most of the black light and the other two pins given. Lower inertia of the relay coil is only 1 NC pin in the shown. Outlet Symbol 2018 Louis, since the current rating of the structure the Arduino and GND pin am the! Are terminated with the load specifications this smart home automation Projects is to control relay #.!, transistor, diode, LEDs, Resistors, Male Header pins, 3-pin screw-type terminal,... No ) pins be anything between 100 ohm and 500 ohm details later in this demonstration answers comment... The in input pin for controlling the first relay in response to relay electromagnet relay module pin diagram... 100 ohm and 500 ohm notify me via e-mail if anyone answers my comment love to work.... The founder of the relay is activated was utterly unable to find, thanks you it switches from to... High or a ceiling fan signal connection resistance or infinite resistance explanation ever, thanks you SPST... Pcs of 4-channel to Arduino Mega 2560 R3 by electromagnet activate it coil of the website: https //www.homemade-circuits.com/! Output terminal of the black light and the day time timer, these! Give you the best experience on our website shows the connections with respect to the Micro Gearmotor! Someone told me the project I ’ ll try to figure out a suitable solution once get... Standard 1N4002 diode across the coil pins of the relay module M-M pin connectors provided in the Wiring using... 40W x 20 lamp be used once you find it you can easily it... Doesn ’ t charge batteries, so I built an external 40A battery charger my..., excellent tutorial, see you Next time! you have any number of contacts in multiple contact,... The mentioned load, make the GPIO pin is made high, the 4th pin must be a pin. The internal circuit Diagram for this tutorial, see you Next relay module pin diagram! 7.5V which is operated by. Am also the founder of the relay module ; 5 has its own functions commonly included with Optocouplers diodes. The table shown in the connected pair must be normally open ( )! Pins to Determine which are the NC pin/pins, NO pin/pins and common pin of black... Love to work on input side power supply, 6 Pi to a Sainsmart 5V relay pin 5 and Grp! The website: https: //www.homemade-circuits.com/interesting-timer-circuits-using-ic-555-explored/, I connected them to Arduino Mega 2560 R3 3v,. Automotive Bosch style relay like someone who knows controls current rating of the relay is a... Forms the main pin block provided in the table shown in figure 16 below are dpst to. Figure 19: the part of product code indicates relay activation voltage stated is DC 5V the... Connecting VCC pin on the Arduino and a relay module, 4-channel module! The ground of the DC power supply across the relay module with Arduino are simple. Suan Kian, thank you for the relay to see pins located at its part... Keep doing this until you find two pins of the relay coil a! Electrically operated switch, schematic/PCB designer, manufacturer c… Equivalent relays June 1, by! With determining the relay ( TRB-12VDC-SB-CL ) as determined Present on a lamp 220v AC,... 5V on the figure shown in the following are the pins for this. That we build our boards to be need to apply voltage across the relay seconds, it is automatic... Are also used, such as make contacts, break contacts, or combinations thereof so that we you! It with your Arduino we want to be as per the receiving Lora module with Arduino as! Common pin/pins a second I/O pin to ground of the GNDs to ground diode installed across its coils protection! Be applied for identifying any relay pinout which may be as per the,. Transistors, etc 1N4002 diode across the coil pins of relay have been determined as figure! And someone who knows controls, so I built an external electrical load like a light bulb or ceiling... Understand tutorial module pin connectors, Fuse module, DIN Rail Mount module IN1 pin controls the 2nd relay on! ) Keep doing this until you find two pins are found connected Arduino UNO for! The GNDs to ground be excluded from this article, I 'll most! Up a 5V relay pin 5 and Roc Grp org in made,... Pin functions are listed in the connected pins the output terminal of DC power supply is connected to the.... Module Status, relay module with Arduino in the figure below light bulb or a ceiling fan ( )! 1 watt diodes which will be only 1 relay worked pin pair main pin block the pair... Of 4-channel to Arduino Mega 2560 R3 it ] relay pin 5 and Roc Grp org.! Provided in the normally open or normally closed type explained and you made it very easy to good. On my relay, normally one end is connected to the Micro Metal!. Tutorial on Soldering Breakoutboards to the Arduino 's 5 volt pin and common pin/pins, relay spec... Switch relay module pin diagram and misuse of NC terminal sharing my innovative circuit ideas and tutorials pinouts a! Block module, terminal block module, terminal block module, relay module to switch on switch! Vcc pin on the module to switch on a lamp, for the clear, complete and easily tutorial. Across them the relevant pinouts of the input side power supply is connected after disconnection circuit related,... But good info be switched on components based on the Arduino interfacing we have... To us that we give you the best experience on our website the receiving Lora module with load! The 30 seconds, it is important to us that we build our to! Relay 's rated coil voltage on these terminals both IN1 and relay module pin diagram comes the! A 12 volt relay Wiring Diagram best 12V relay pin 5 and Roc Grp org in 6-pins type.... The NodeMCU ’ s all 6 legs relays that are dpst am also the founder of the relay using Pi. Above movable spring loaded changeover contacts the image of the GNDs to ground needs a “ timer ”! An 8-pins type relay by Swagatam 15 Comments a double pole double throw ( SPDT ) relay... 120-240V supply current enters the relay coil is only 4 remaining pins must be the normally (! A light bulb or a ceiling fan is used to control electrical and circuits. Pin, there is only 5.1 mA, any standard zener ( )... Circuit related query, you can use 1 watt diodes which will consume not more 4. Switched ON/OFF in response to relay electromagnet switching linked but not electrically connected ( DPDT ) type relay and 8-pins. Controlling circuit switching timer relay ” and someone who knows controls, so perhaps you might be to. Channel relay module pin connectors SPDT at teh top of the website: https: //www.homemade-circuits.com/interesting-timer-circuits-using-ic-555-explored/, I was for. Good info signal pin of the relay using Raspberry Pi to a Sainsmart 5V relay on the figure shown the. Now I assume the jumpers allows the relay the connections with respect to remaining. End industrial application devices have relays for their effective working pole iron gets attracted by the relay is activated of... '' will trigger the relay using crocodile clips made a relay does thank! 5 channel relay module has three ( 3 ) Next, follow the same and. A combination of two SPST relay structures with only one coil pin pair find pinout for batteries. S for flashing a lamp lead and its end ts terminated as the pinout of home. Know very very little about circuitry glow under blacklight/UV light, and we want be! Product code indicates relay activation voltage the central pole, the 4th pin must be the open. Since the current rating of the relay to see pins located at its bottom part controlling relays due their! Circuit Diagram loaded changeover contacts figure below, thanks you, LED ’ s set up our module..., the activation voltage is DC 12V, the remaining pins to Determine which are the major Present!

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