This is a DC12V controlled 4 channel relay module. It’s high level trigger. Trigger current need not less than 5mA, It can be used in many industry system that using DC12V power supply.

Features:

• SMD optocoupler isolation
• Good in safety. In power system and high voltage system, the lower current can control the higher one, able to control various appliances and other equipment with high-current current.
• Standard interface that can be controlled directly by microcontroller (Arduino, 8051, AVR, PIC, DSP, ARM, ARM, MSP430, TTL logic).
• Indication LEDs for Relay output status.
• With a normally-open (NO) and a normally-close (NC) contact.

Specification:

• Number of Relays:  4
• Working voltage:  12V DC
• Control signal:  TTL level
• Rated load:  7A/250VAC; 10A/125VAC; 10A/28VDC;
• Contact action time:  10ms/5ms
• Current:  15-20mA per channel