Description:

2-Channel SPST Relay Unit is a 2-channel SPST relay module, equipped with two high-current relays that work under AC250V 8A or DC28V 8A. Each relay adopts independent IO control, and status indicator LED. It is suitable for home appliance power control, or ON/OFF switch for industrial equipment.
The relay is driven by IO output high and low level signals, so before connecting to the main control, please make sure that the connected port IO supports configuration as output mode. (Note: G36 of ESP32 is not allowed to be configured as output mode , so PortB will not be able to drive normally)
Product Features:
2-channel relayAC-250V/DC-28V @ 8AStatus Indicator LED
Specification:
Maximum on-off voltage: AC-250V/DC-28VRated current: 8ACoil control voltage: DC5VCoil power consumption: 5V@154mACoil action time: 8msCoil release time: 5msContact form: A normally open typeContact material: AgSnO2Relay indicator: Blue x2Net weight: 20gGross weight: 31gProduct size: 56 x 24 x 19mmPacking size: 93 x 138mm
Package included:
1 x 2RELAY Unit1 x HY2.0-4P cable (20cm)2 x VH3.96-4P Plug terminal
Applications:
AC/DC signal switchingDigital equipment power on and off
PinMap

M5CORE – PORT A

G21

G22

2RELAY

RELAY-A

RELAY-B

Schematic

ExampleArduin0
#include
#define RELAY_A 21#define RELAY_B 22
void setup() { pinMode(RELAY_A, OUTPUT); pinMode(RELAY_B, OUTPUT);}
void loop(void) { digitalWrite(RELAY_A, LOW); digitalWrite(RELAY_B, LOW); delay(2000); digitalWrite(RELAY_A, HIGH); digitalWrite(RELAY_B, HIGH); delay(2000);}