What is contact closure?
Contact closures are designed for connecting switches, buttons, motion detectors, or other devices that make an electrical connection between two conductors. Digital outputs are designed for connecting LED indicators, small relays, buzzers, pilot lights, and most anything that can be powered from a small DC voltage.
What is a contact closure interface?
Contact Closure Interfaces. Contact closure interfaces allow simple integration of the HomeWorks® system with other equipment throughout the house .
What is a dry contact relay?
Dry contact can refer to a secondary set of contacts of a relay circuit which does not make or break the primary current being controlled by the relay. Usually some other contacts or devices have the job of starting or stopping the primary current being controlled.
What is the difference between a wet and dry contact?
A ‘wet’ contact is connecting a hose to a spigot that is flowing water. A ‘dry’ contact is connecting a hose to a spigot that is turned off. In electronics, electricity would be equivalent to water.
What does dry contact input mean?
A dry contact, also called a volt-free contact, is a relay contact that does not supply voltage. The relay energizes or de-energizes when a change to its input has occurred. In other words, a dry contact simply detects whether or not an input switch is open or closed. infinitely adaptable.
What is the difference between contactor and relay?
A contactor joins 2 poles together, without a common circuit between them, while a relay has a common contact that connects to a neutral position. Additionally, contactors are commonly rated for up to 1000V, while relays are usually rated to only 250V.
What is dry contact closure?
Dry contact simply operates like an ordinary switch that opens or closes the circuit. When the contacts are closed the current flows through the contacts and when the contacts are opened no current flows through the contacts.
Why is it called a dry contact?
No current: A dry contact is the synonym of volt free — it is not “wetted” by a voltage source. Dry contact can refer to a secondary set of contacts of a relay circuit which does not make or break the primary current being controlled by the relay.
What does dry contact closure mean?
What is the difference between a wet contact and a dry contact?
What is an IP camera?
IP camera. An Internet protocol camera, or IP camera, is a type of digital video camera commonly employed for surveillance, and which, unlike analog closed circuit television (CCTV) cameras, can send and receive data via a computer network and the Internet.
What is the difference between IP cameras and CCTV cameras?
They are commonly used for surveillance but unlike analog closed-circuit television (CCTV) cameras, they require no local recording device, only a local area network. Most IP cameras are webcams, but the term IP camera or netcam usually applies only to those that can be directly accessed over a network connection, usually used for surveillance.
What is an Internet Protocol camera?
An Internet Protocol camera, or IP camera, is a type of digital video camera that receives control data and sends image data via the Internet. They are commonly used for surveillance.
What is the difference between analog and IP cameras?
IP cameras differ from previous generation analog cameras that transmitted video signals as a voltage, whereas IP cameras send images digitally using the transmission and security features of the TCP/IP protocol.
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