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8/13/2019 Single Relay Board
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1 | P a g e A n I S O 9 0 0 1 - 2 0 0 8 C e r t i f i e d C o m p a n y SINGLE RELAY BOARD Order Code RDL/SRB/13/001/V1.0
www.researchdesignlab.com
Single Relay Board
The board has only one relay driven by TTL circuit. The board works on 12V but the input signal can come directly from microcontrolleroutput working at 3V or 5V to control relays. Each relaycan switch varierty of AC or DC high voltage, high currentloads working at 110V or 220V AC mains like lights, fans,motors and such. The status of relay is indicated byindividual LEDs.
Features
LED indication of relay on and power. Design based on highly proven TTL as driver. AC or DC operating voltages. No leakage current.
Applications
LED series and parallel connections. Relay drive from external contacts.
SpecificationsParameter ValueOperating Voltage +12v dcCurrent 8A
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2 | P a g e A n I S O 9 0 0 1 - 2 0 0 8 C e r t i f i e d C o m p a n y SINGLE RELAY BOARD Order Code RDL/SRB/13/001/V1.0
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Pin Details
Pin Name Details1 gnd Power supply ground2 V+ +12v3 R +5v
Working
A relay is an electrical switch that opens and closes under the controlof another electrical circuit. In the original form, the switch is operated by anelectromagnet to open or close one or many sets of contacts. It was invented byJoseph Henry in 1835. Because a relay is able to control an output circuit ofhigher power than the input circuit, it can be considered to be, in a broad sense, aform of an electrical amplifier.
Sugar Cube Relay
Despite the speed of technological developments, some products prove so popular that their key parameters and design features remain
virtually uncha nged for years. One such product is the „sugar cube‟ relay,
shown in the figure above, which has proved useful to many designers who
needed to switch up to 10A, whilst using relatively little PCB area.
8/13/2019 Single Relay Board
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3 | P a g e A n I S O 9 0 0 1 - 2 0 0 8 C e r t i f i e d C o m p a n y SINGLE RELAY BOARD Order Code RDL/SRB/13/001/V1.0
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Since relays are switches, the terminology applies switches is also
applied to relays. A relay will switch one or more poles, each of whose contacts
can be thrown by energizing the coil in one of three ways:
1. Normally - open (NO) contacts connect the circuit when the relay is
activate d; the circuit is disconnected when the relay is inactive. It is also
called a FORM A contact or “make” contact.
2. Normally - closed (NC) contacts disconnect the circuit when the relay is
activated; the circuit is connected when relay is inactive. It is also called
FORM B contact or” break” contact.
3. Change-over or double-throw contacts control two circuits; one
normally open contact and one normally – closed contact with a common
terminal. It is also called a Form C “transfer “contact.
Sample Application
To view sample code and schematic click the below link:
http://researchdesignlab.com/index.php/interfacing-board/single-relay-board.html
8/13/2019 Single Relay Board
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4 | P a g e A n I S O 9 0 0 1 - 2 0 0 8 C e r t i f i e d C o m p a n y SINGLE RELAY BOARD Order Code RDL/SRB/13/001/V1.0
www.researchdesignlab.com
Board Dimensions
60mm
20mm
To buy this product click the below link
http://researchdesignlab.com/index.php/interfacing-board/single-relay-board.html