Passive Infrared (PIR) sensors are a type of motion sensor that are commonly used in security systems. PIR sensors detect changes in the infrared radiation levels emitted by objects in their field of view, and are often used to trigger alarms or lights when someone enters a room or moves around in a particular area. In this article, we will discuss the wiring diagram for a 2-way PIR sensor and how it can be connected to a security system.
What is a 2-Way PIR Sensor?
A 2-way PIR sensor is a type of motion sensor that is capable of detecting movement in two directions. This means that it can detect motion both when someone enters a room and when they leave. This makes it a useful tool for monitoring entry points and exits, such as doorways or hallways.
2-way PIR sensors are often used in security systems, as they can help detect if someone is entering or leaving a secure area. They are also commonly used in homes and businesses to trigger lights or alarms when someone enters a room or moves around in a particular area.
Wiring Diagram for a 2-Way PIR Sensor
Connecting a 2-way PIR sensor to a security system requires a specific wiring diagram. The diagram will depend on the specific model of your PIR sensor and the type of security system you are using. However, most 2-way PIR sensors have four wires that need to be connected to the security system.
The four wires are typically labeled as follows:
- Power (+)
- Ground (-)
- Alarm Output
- Alarm Input
The Power (+) and Ground (-) wires are used to provide power to the PIR sensor. The Alarm Output wire is used to send a signal to the security system when motion is detected. The Alarm Input wire is used to receive a signal from the security system to enable or disable the PIR sensor.
Here is an example wiring diagram for a 2-way PIR sensor:
| Wire Color | Wire Function | Typical Connection |
|---|---|---|
| Red | Power (+) | Connected to power source |
| Black | Ground (-) | Connected to ground |
| Yellow | Alarm Output | Connected to alarm input on security system |
| Green | Alarm Input | Connected to alarm output on security system |
FAQ
Q: What is a PIR sensor?
A: A PIR sensor is a type of motion sensor that detects changes in infrared radiation levels emitted by objects in its field of view. PIR sensors are commonly used in security systems to detect motion and trigger alarms or lights.
Q: What is a 2-way PIR sensor?
A: A 2-way PIR sensor is a type of motion sensor that can detect motion in two directions, such as when someone enters or leaves a room. This makes it a useful tool for monitoring entry points and exits in security systems.
Q: What are the four wires on a 2-way PIR sensor?
A: The four wires on a 2-way PIR sensor are typically labeled as Power (+), Ground (-), Alarm Output, and Alarm Input. The Power and Ground wires are used to provide power to the sensor, while the Alarm Output and Alarm Input wires are used to communicate with the security system.
Q: How do I connect a 2-way PIR sensor to a security system?
A: To connect a 2-way PIR sensor to a security system, you will need to refer to the wiring diagram for your specific model of sensor and type of security system. However, most sensors have four wires that need to be connected to the security system’s power source, ground, alarm input, and alarm output.
Q: What are some common uses for a 2-way PIR sensor?
A: 2-way PIR sensors are commonly used in security systems to monitor entry points and exits, such as doorways or hallways. They are also used in homes and businesses to trigger lights or alarms when someone enters a room or moves around in a particular area.
