ES32A08/ES33B08 ESP32 Industrial IO Expansion Board – 8AI-8DI-8DO Relay Module with RS485 Modbus & WiFi for PLC Automation IoT DIY

1 Operating voltage: DC 12V/24V

2Operating Current : Standby current (Digital tube OFF) 14MA, Standby current 51MA (Digital tube ON), 1 relay open 76MA, 2 relays open 107MA, ... 8 relays open 291MA

3On-board resources: 1x RS485 Interface 8x opto-isolated inputs (low level trigger, NPN type), 4x 0/4-20MA Current Input,4x 0-5V/10V Voltage Input,4x buttons, 1x 4 bit digital tube display, 1x ESP32 slots, 8x relay outputs


ES32A08
Relay Module:
4 size 180*72*20mm(Only Board)
5 Weight : 189g(Only Board), 317g(with shell)

ES33B08
Darlington tube Module:
4 size 123*72*20mm(Only Board)
5 Weight : 93g(Only Board), 184g(with shell)

Please contact me for more information!

Purchase Notes:

1 ES32A08/ES33B08 can not work independently, must be under the control of the 38PIN ESP32 board to work,If you do not have a 38PIN ESP32 board, purchase it separately or purchase a kit with 38PIN ESP32

2 This is an expansion board based on 38PIN ESP32. We only provide three vscode codes for testing the hardware. More codes and functions need to be developed by yourself.

3 If you need more functionality, write your own code. We do not provide additional code and technical support

4 The acquisition accuracy of analog quantities is determined by the ESP32 board. It is recommended to collect multiple times to obtain the average value.

Application examples:

As long as you write ESP32 code,You can use it to achieve a variety of delay timer function,such as:
WIFI remote control switch
WIFI Current and voltage collection
RS485 Master-Slave Device(PLC MCU),
4x 0/4-20MA Current Collection,
4x 0-5V/10V Voltage Collection,
Motor forward and reverse,
Timing on,
Timing off,
Power-up delay,
Trigger delay,
Infinite loop delay,
A finite number of cyclic delays,
Power sequencer,
And so on.