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The Arduino 4 Relays Shield is a solution for driving high power loads that cannot be controlled by Arduino's digital IOs, due to the current and voltage limits of the controller.
The Shield features four relays, each relay provides 2 pole changeover contacts (NO and NC); in order to increase the current limit of each output the 2 changeover contacts have been put in parallel. Four LEDs indicate the on/off state of each relay.
Summary:
Operating Voltage: 5V
Coil current consumption: 140 mA (with all releays on, about 35 mA each)
Single pole chargeover contact maximum current: @30 VDC 2A
Maximum load voltage: 48V
Maximum switching capacity: 60W
Input and Output: The relays are controlled by the following Arduino board pins:
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