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12V DC Relay Modules - 1, 2, 4, 8 and 16 way
Description
These high quality 12V DC Relay modules uses low power SMD components, allowing for easy switching of higher voltages and are ideal for use with a 12v Power supply.
Please remember most microcontroller such as a PIC, Arduino, ARM or AVR are 3.3v or 5v and therefore a seperate 12v power supply will be required to power these relay modules, with the logic control coming from the microcontroller.
The relays used in these modules can be used to switch up to 10A at 250V AC, or up to 10A at 30V DC.
We supply these modules in 1 way, 2 way, 4 way, 8 way and 16 way versions. All versions provide LED indicators to show which relays are currently on.
If the input voltage is low, the relay's NO (Normally Open) contact is connected to the relay's COM (common) contact. If the input voltage is high, the relay's NC (Normally Closed) contact is connected to the relay's COM (common) contact.
Vcc = 12V
GND = 0V
IN = Low to engergise Relay
The 2 way, 4 way and 8 way versions have additional protection for your microcontroller through the use of an opto-isolator for the actual relay switching - simply remove the jumper connecting the VCC and JD-VCC pins, and you can supply separate power for VCC (the microcontroller side) and JD-VCC (the relay coil side). A diagram of this is shown below:
PLEASE NOTE THE SINGLE RELAY VERSION DOES NOT HAVE THE VCC and JD-VCC pins
PLEASE NOTE THE 1 WAY RELAY BOARD DOES NOT HAVE OPTO-ISOLATION
