The Arduino 4 Relay Shield is a solution for driving high power loads that cannot be driven by Arduino digital IOs due to the current and voltage limitations of the Control.
The Shield has four relays, each relay offers 2 pole changeover contacts (NO and NC); to increase the current limit of each output the 2 changeover contacts have been placed in parallel. Four LEDs indicate the on/off status of each relay.
Summary:
Operating voltage: 5V
Coil current consumption: 140 mA (with all relays at approx. 35 mA each)
Single-pole chargeover contact maximum current: @ 30 VDC 2A
Maximum load voltage: 48V
Maximum switching power: 60W
Input and Output: The relays are controlled by the following Arduino board pins:
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