EOL – 4-Channel Relay Board with STM32 Microcontroller

Description

Product Status Notice This product is EOL (End of Life). Please order the new version: Module13.2 4Relay v1.1 /* ===== Scoped Description Style ===== */.product-description.rte { font-family: -apple-system, BlinkMacSystemFont, “Segoe UI”, Roboto, “Helvetica Neue”, Arial, sans-serif; color: #2c2c2c; line-height: 1.65; font-size: 16px;}/* ===== Headings ===== */.product-description.rte h2 { font-size: 1.8em; color: #0D47A1; border-left: 4px solid #1f6fe5; padding-left: 12px; margin-top: 32px; margin-bottom: 16px;}/* ===== H3 Titles Optimization ===== */.product-description.rte h3 { font-size: 1.4em; color: #0D47A1; margin-top: 24px; margin-bottom: 12px; font-weight: 500; padding-bottom: 6px; border-bottom: 2px solid #e6e6e6;}/* ===== Paragraphs ===== */.product-description.rte p { margin-bottom: 20px; line-height: 1.8; color: #4a4f57; font-size: 16px;}/* ===== Paragraph Images (only in description) ===== */.product-description.rte img { display: block; max-width: 100%; height: auto; margin: 24px auto; border-radius: 12px; box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);}/* ===== Lists ===== */.product-description.rte ul { padding-left: 20px; margin-bottom: 16px; list-style-type: disc;}.product-description.rte li { margin-bottom: 6px;}/* ===== Links ===== */.product-description.rte a { color: #0288D1; text-decoration: none; transition: color 0.3s ease;}.product-description.rte a:hover { color: #01579B;}/* ===== M5Stack-style Spec Table ===== */.product-description.rte .table-container { width: 100%; margin: 24px 0; overflow-x: auto;}.product-description.rte .table-container table { width: 100%; border-collapse: collapse; font-family: inherit; font-size: 14px; color: #2c2f36; background-color: #ffffff; border-radius: 10px; overflow: hidden; box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);}.product-description.rte .table-container thead th { background: #1f6fe5; color: #ffffff; padding: 14px 16px; text-align: center; font-weight: 600; border: none; vertical-align: middle;}.product-description.rte .table-container td { padding: 14px 16px; border-bottom: 1px solid #e6ebf2; vertical-align: middle;}.product-description.rte .table-container tbody td:first-child { width: 36%; text-align: center; font-weight: 500; color: #4a4f57; background-color: rgba(31, 111, 229, 0.02);}.product-description.rte .table-container tbody tr:nth-child(even) { background-color: #f7f9fc;}@media (hover: hover) { .product-description.rte .table-container tbody tr:hover { background-color: #eef3ff; }}/* ===== Learn & Documents Button ===== */.product-description.rte #learn-and-documents-btn { display: inline-flex; align-items: center; padding: 6px 14px; background-color: #1f6fe5; color: #ffffff; font-weight: 600; border-radius: 6px; margin-top: 8px; text-decoration: none; transition: background 0.3s ease;}.product-description.rte #learn-and-documents-btn:hover { background-color: #1661c1;}/* ===== Responsive Design for Smaller Screens (with table adjustments) ===== */@media screen and (max-width: 768px) { .product-description.rte .table-container table, .product-description.rte .table-container thead, .product-description.rte .table-container tbody, .product-description.rte .table-container th, .product-description.rte .table-container td, .product-description.rte .table-container tr { display: block; width: 100%; } .product-description.rte .table-container thead { display: none; } .product-description.rte .table-container tbody tr { padding: 12px 0; border-bottom: 1px solid #e6ebf2; } .product-description.rte .table-container tbody td { padding: 8px 16px; border: none; text-align: left; } .product-description.rte .table-container tbody td:first-child { width: 100%; background: none; color: #1f6fe5; font-weight: 600; padding-top: 16px; } .product-description.rte .table-container tbody td:last-child { padding-bottom: 16px; color: #2c2f36; line-height: 1.6; } /* Ensure button appears correctly on mobile */ .product-description.rte #learn-and-documents-btn { font-size: 14px; padding: 8px 16px; }}

Description

Module13.2 4Relay is a relay module compatible with M5Core/Core2 controllers, featuring 4 mechanical relay control channels (NO, COM). The module uses the I2C communication protocol, effectively saving IO resources. The jumper cap design allows switching between active/passive working modes to meet different circuit requirements. This relay module only supports DC circuit switching, with a maximum load capacity of 24W (DC 24V@1A) per channel, making it suitable for controlling small load circuits.

Features

• Embedded STM32F030F4 controller:
  • I2C communication interface (addr: 0x26)
• Relays:
  • 4 x relay control (COM, NO interface)
  • Maximum load capacity 24W (DC 24V@1A)
• Supports two working modes (controlled by jumper caps):
  • Active control:
    • Power input connected to the relay NO interface, directly powering the load.
  • Passive control:
    • Power input not connected to the relay interface; user circuit must include power.
• Power input (DC only):
  • DC 5-24V INPUT -> M5 BUS HPWR bus (controlled by jumper caps, when stacking multiple M5 modules, the HPWR bus can power other modules requiring 24V, such as the SERVO2 module)
• Development platforms:
  • UIFlow, Arduino

Includes

• 1 x 4Relay Module
• 5 x 2.54mm-2P terminal blocks (green)
• 10 x jumper caps
• 1 x wiring manual

Applications

• Solenoid valve control
• DC circuit switching

Specifications

Learn and Documents

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