8-Channel Relay Module is an electronic control board that contains 8 relays, allowing a microcontroller or computer to turn ON or OFF up to eight electrical devices using low-voltage signals.
Speicifications
Number of Channels:8 independent relays
Operating Voltage:5V DC
Trigger Voltage:3.3V – 5V control signal
Relay Type:Electromechanical relay
Maximum Switching Voltage:250V AC or 30V DC
Maximum Switching Current:10A per relay
Trigger Current:About 5 mA
Relay Activation Time:About 5–10 ms
Control Interface:IN1 – IN8 digital input pins
Isolation:Optocoupler isolation (in many modules)
Indicators:LED indicator for power and each relay
Connection Type:Screw terminals for load connections
Board Dimensions:Approximately 138 × 56 × 18 mm
Operating Temperature:About –40°C to 85°C
Pin Configuration
Typical pins on the module include:
VCC – 5V power supply
GND – Ground
IN1 – IN8 – Control signals for each relay
COM – Common terminal
NO – Normally Open terminal
NC – Normally Closed terminal