Device specification :

Board comes fully assembled!

Comes with programmed ESP8266 WIFI module

Default firmware type Access Point, SSID "16CH relay AP", default IP address 192.168.4.1

PCB board dimension 135mm x 150mm

Operation DC voltage – 5.0V

Maximum peak current @5.0V – 2000mA

Maximum current per relay – 5A...10A @ different voltages

LEDs indicators for each electromagnetic relay channel

Relays with SPDT switch contacts: Normally Open, Common, Normally Closed

Relay contact resistance 100 milliohms max. ( initial value )

Relay insulation resistance 100 MOhm min. (DC 500V)

Relay operation time 8 ms max

Relay release time 5ms max

Relay dielectric strength 750 VAC, 50/60Hz between contact

Relay dielectric strength 1,500 VAC, 50/60Hz between all elements

Relay expected life Mechanical - 10,000,000 operations min.

Relay expected life Electrical - 100,000 operations min. at rated load

Working temperature range - 25 C ~ + 80 C

The module contains an I2C expander 16bit PCF8575 chip

The logic power supply voltage should match the voltage levels on the I2C bus.

Depending on the relay stock available, the relay manufacturer may differ

WIFI ESP8266 sample codes, Webpage interface, Home Assistant:

HOME ASSISTANT - https://github.com/krida0electronics/16ch_pcf8575_hass

Full project on Github - link to the Github folder

ESP8266 WIFI Access Point, ip address 192.168.4.1 - ARDUINO IDE esp8266 code

ESP8266 WIFI Client - ARDUINO IDE esp8266 code