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Wondering how to install and wire a metal push button without making common mistakes? Unclear pin names, multiple wiring options, and the possibility of short circuits make it extra challenging. So, this blog will help you ease all your worries. We will take care of everything, from the tools required to wiring, so you can confidently install the metal push button, whether it’s your first time or not!
1) Tools and Materials You’ll Need
The very first thing in fitting a push button is to collect the necessary tools and materials. By doing so, it will help prevent time wastage and delays in the installation process. Here are some of the important items with detailed explanations.
i) Metal Push Button Switch
This is your main control device. You can choose between momentary (only works when pressed) or latching (stays on after pressing). Metal push buttons come in different sizes (like 16mm, 19mm, or 22mm) and voltage ratings. So, pick the one that fits your project-specific requirements. Some also include LED indicators, adding a visual signal when the button is active.
ii) Power Supply (Battery or DC Adapter)
The push button requires an adequate power supply for proper functioning. Most metal push buttons operate on either 12V or 24V DC, though some may use AC. Make sure the power supply and the button’s voltage rating are the same to prevent damage. A regulated power supply offers a safe output.
iii) Electrical Wires
Ensure that the wires you select are insulated and will endure the required current. The electrical gauge should reflect the power your device requires. Wires marked with colours make the identification of positive and negative connections quicker. Moreover, pre-tinned wires are easier to solder.
iv) Wire Stripper and Cutter
Cleanly stripping wires is necessary to make a strong connection. Wire strippers allow you to remove the insulation without damaging the wire core. The cutter can trim wires to the desired lengths as well. Well, working neatly ensures the device is safe.
v) Soldering Kit or Quick Connect Terminals
For a more permanent solution, soldering wires directly onto the switch terminals works best. If you wish for something more removable, however, use quick-connect terminals or spade connectors. Additional safety can be provided by covering the exposed joints with heat-shrink tubing.
vi) Screwdriver
For fastening or loosening the push button’s screw terminals, a precision screwdriver is required. With the button’s screws, a precision screwdriver will help fasten the button to the mounting surface or electrical box.
vii) Multimeter
This tool can check the voltage, consistency, and health of the circuit. A multimeter is helpful to verify that connections are functional prior to final use. It is especially useful if something is not working.
viii) Panel or Mounting Surface
A flat panel will have to be prepared for the button to be uploaded. Using the button dimensions, drill a hole (verify the diameter in the product specifics). Confirm that the panel is rigid and safe enough to operate. Certain buttons are provided with mounting nuts, which help in installation.
2) Understanding the Terminal Pins
Prior to connecting wiring to your metal push button, you need to know the function of each terminal pin. Terminal pins are the small connection points your button will be interfacing with the rest of the system. Knowing how they work will help you wire the button correctly and safely.
Most vertically mounted metal push buttons have two to five push pins, depending on the features and the model of the push button. Let’s have a look at the most popular ones:
a) NO (Normally Open)
This is the pin which permits current to flow only when the button is pressed. It’s the simplest method of connecting for on/off actions and is widely accepted. It is released only when the button is no longer pressed.
b) NC (Normally Closed)
This pin is the opposite of NO. It permits current to flow through when the button isn’t pressed and disables the flow when the button is pressed. This is helpful in systems that need a power off when the button is activated.
c) COM (Common)
This is the main pin that connects to either the NO or NC. It serves as the centre of the circuit and can be used as either the centre or the pivot. Well, this pin usually receives the power source.
d) LED+ and LED-
If your push button features an LED light, you will find two extra pins labelled LED+ and LED-. These pins are used for illuminating the light. To illuminate the LED light, attach the positive side to LED+ and the negative (ground) to LED-.
Some symbols or peculiar labels may describe buttons differently. In such cases, if you consider the product manual, that will be a good practice. If you are still stuck, a multimeter can be helpful in identifying the function of each pin.
3) Wiring Configurations Based on Function
The type of wiring done to a metal push button switch is dependent on whether it is a momentary or latching switch. Each of them has its own distinct uses, and here’s an example of each.
A) Momentary Switch Example
As the name suggests, a momentary switch activates and remains active only when pressed. They are common in devices, for example, doorbells, buzzers, and other devices which need to be activated temporarily.
- Wiring Method:
Step 1) First, connect the positive wire from your power supply to the COM (common) terminal.
Step 2) Now, connect the NO (normally open) pin to the positive input of the device that you want to operate.
Step 3) Ok, now link the negative wire from your power supply to the device’s negative terminal.
Step 4) If there is an LED light on the switch, you have to connect LED+ to the line carrying positive voltage and LED- to the ground or negative terminal.
Pressing the button starts the power flow to the device as the circuit is closed. Current flow ceases when the button is released, breaking the circuit. This is helpful for short sprints of power and temporary tasks.
B) Latching Switch Example
A metal push button latch is an on/off switch that remains in the selected position until pressed again. It requires one press for activation and another for deactivation. Great applications include lights, power tools, and other switches that need toggling.
- Wiring Steps:
Step 1) The power source’s positive (+) terminal connects to the COM terminal.
Step 2) NO terminal connects to the device’s power input.
Step 3) Now, just connect the (-) terminal of the battery with the source of power. Ok!
Step 4) For the LED, just connect LED+ to positive and LED- to ground.
This wiring behaves like a light switch. Press once to activate, and it will remain in that state until pressed again. Remember to check your switch type and the manufacturer’s guidelines for wiring. Allocating time to plan saves a lot of hassle during wiring.
4) Step-by-Step Installation Instructions
This guide will provide directions for installing a metal power button. While it may appear complex at first sight, it can be easily done step-by-step.
Step 1: Ensure the Power is Fully Off
Never start any work if you haven’t verified that the power to the device has been turned off completely. This helps with personal safety concerns and prevents the occurrence of short circuits. You can check with a voltage tester to confirm that electricity isn’t flowing.
Step 2: Prepare the Area That Will Be Mounted On
Think about where exactly you intend to install the button. Most metal push buttons are panel mounted, which means you have to drill a hole that matches the diameter of the button, which is usually between 16mm and 22mm. To prevent damage to the wires, ensure that the edges of the hole are smooth.
Step 3: Put the Button in Place
From the front side, take the button and insert it into the hole on the panel. Use the nut that is provided to lock the button in place. Make sure that the button is center and securely fastened; if the button is loose, then you need to either add more nut tightness or add a washer to make it tighten.
Step 4: Determine the Terminal Pins
Some buttons have their features listed on the back. Look for the symbols COM (common), NO (normally open), NC (normally closed), LED+, and LED-. As we said before, you can always check with a multimeter if the pins are not labelled. Also, remember to check the instruction manual to confirm for any additional information.
Step 5: Wire Connection
As needed for momentary or latching functions, your wires can be connected to the terminals using crimped connectors or solder. Go over every connection check and confirm there is no reverse polarity for the wiring. Ensure all connections are correct.
Step 6: Review Connections
After wiring everything, restore power and test the button. Confirm that the device functions properly by turning it on and off as expected. If the indicators are meant to light up, check that they do so. If the device does not function as expected, disconnect power and check the wiring.
Step 7: Organising Wires For Safety
Short circuits happening over time can be avoided if you tie up the device using cable ties, sleeves, and clips. Reducing the chances of damage and enhancing aesthetics can be achieved by properly organising the wires. Ensuring there are no loose wires makes the device safe and more reliable.
5) Safety Tips During Installation
Always exercise caution when installing a metal push button. While steps may be intuitive, electricity can pose a risk without proper safety measures in place. Adhering to the following suggestions will significantly reduce the risk to both you and your equipment.
! Always Switch Off the Power: The first commandment for working with electricity is never to approach circuits with tools or wires unless the corresponding power is shut off. Each circuit should be treated individually. You can either unplug or switch off the circuit breaker for that circuit.
! Use Proper Tools: Always use insulated tools that are meant for electrical work. Insulated wrenches for screws, wire cutting pliers, and even screwdrivers must not be broken or worn out.
! Read Your Customer’s Manual Always: It is dangerous to overestimate equipment and devices’ functionalities. Each metal push button can vary. Product manuals should be the first step in making sure the right terminals aren’t connected or switches overloaded.
! Avoid Wet Areas: Damp areas should be avoided unless a switch is rated specifically for such areas. Water and electricity don’t mix, so switches should be installed in dry places.
! Confirm All Connections: Only after all wires and connections have been checked can power be restored. However, if any wires are left loose or crossed, that can lead to short circuits, sparks, or even damage to the device.
! Use safety tools While Working: Putting on safety goggles and gloves will be beneficial, especially with small shocks, due to electricity being dangerous.
! Don’t Rush The Work: Take care with every step of the process. Be extra careful when trying to test the switch or connecting wires. Those actions can make people rush to make mistakes. There is nothing wrong with asking for help or hiring an expert if you’re nervous.
Having these assurances will help reduce stress and boost confidence when installing a metal push button.
6) Troubleshooting Common Issues
A metal push button might bring along issues even with careful installation. Below are a few problems along with solutions that will help ease your mind.
- The Button Is Unresponsive
Make sure that the power source works. If that works, check your wiring. Ensure all wires that were meant to be used are used and that there are no stray wires. Also, confirm that the necessary pins have been connected. Depending on your switch type, the correct pins (COM, NO, or NC) should be used.
- LED Not Illuminating
With your button’s LED not lighting up, first check for errors with the circuitry. Now, pay attention if the LED is set up on the correct side. Pay attention to the LED+ and LED- as they need to be connected in the right direction to work. Finally, make sure the power source is supplying adequate voltage for the LED.
- The Device Remains Either Active or Inactive
If the connected device does not change state (does not actively turn on or off), your switch may be miswired. For momentary switches, the device should only activate while the button is pressed. For latching switches, a single press should activate them, and another press should deactivate them.
- The Button is Loose
When the button is loose, the mounting nut could be too loose or missing. To fix this, retighten the nut, and the button should no longer wobble.
Taking each step in the checking methodically helps solve most issues. If the problem persists, consult the documentation again, or alternatively, consider a different button.
7) FAQ
1. What voltage is required for a metal push button?
As is the case for most metal push buttons, they are compatible with 12V or 24V DC. It is always advisable to check the label or manual, though, as some models can have AC or other voltage ranges.
2. How do I mount a metal push button to a panel?
As with any button, a perfectly shaped hole is required that is between 16 mm and 22 mm wide. The button should be inserted from the front side of the panel, after which the nut on the rear side should be loosened and the button should be mounted firmly.
3. What’s the difference between momentary and latching switches?
Momentary switches are typically used in scenarios where the power is only required for brief spells, such as during resets. In contrast, latching switches are activated by a single press and deactivated by another, making them useful in scenarios where sustained operation is required.
8) Conclusion
The installation of the push buttons becomes a piece of cake if only the correct procedures are followed. Safe wiring practices paired with the proper tools will help ensure the entire process is done correctly and with ease. Well, final checks and double verifications are always a must to guarantee that safety procedures are adhered to. Do not be hasty; allow yourself the necessary time to do all the work.
9) Appendix
Lastly, one important thing to share with you: GQEM has more than 20 years of experience in the design and manufacture of metal push buttons with an emphasis on durability and reliability. Our GL series has a broad range of uses, which include industrial automation, smart homes, medical equipment, and vehicles.
- Key features include:
- Machined stainless steel or aluminium housings with LED-rated lamps, and rugged IP54 or IP65 waterproof ratings.
- From 12mm to 30mm, all sizes are provided to accommodate various panels.
- Momentary and latching actions are selectable, with NO, NC or dual contact options.
- With LED+ and LED– pins for ring lights or indicator lighting, models can be LED-illuminated.
- Customizable designs include electroplated finishes, laser engraving, and logos, making them more marketable.
- Certified by CE; widely used in elevators, charging stations, and control panels, marine systems, automotive & medical devices.
A notable model is GL-22FE11-G23-PJ which features a 24 V LED, is 22mm, waterproof, and is a flat-head momentary switch. GQEM offers OEM/ODM and provides free samples and full technical assistance. You can contact GQEM by clicking here.
