Best 4 Relay Output Board For Access Systems

Looking for the best 4-relay output board for your access system? We’ve curated a list of top picks to ensure your setup is secure, smooth, and easy to use.

Access control systems need reliable and efficient relay boards. We’ve found the best 4-relay output boards to make your setup secure and smooth. These boards are easy to use and work with various systems.

Whether you’re a beginner or a pro, these boards offer flexibility and safety. They’re perfect for gates, doors, and more. Let’s explore the top picks to find your ideal match.

List of Top 10 4 Relay Output Board For Access Systems

Title	Best For	Price
Seco-Larm PD-4BTQ Enforcer Access Power Controller Board; 4 Outputs; for 12/24 VAC/VDC Operation; Each Output Individually Fused; Individual Status LEDs; Dry and Wet Trigger Inputs	The Seco-Larm PD-4BTQ Enforcer Access Power Controller Board is perfect for anyone needing reliable access control. It’s ideal for systems using 12/24 VAC/VDC power and works great with ENFORCER power supplies.	View on Amazon (paid link)
SunFounder Lab 4 Relay Module 5V 4 Channels Relay Module Compatible with Arduino R3 1280 Arm PIC AVR STM32	This SunFounder Lab 4 Relay Module is perfect for hobbyists, students, and makers who want to control high-current devices with their Arduino or other microcontroller projects. It’s easy to use and great for learning about relays and automation.	View on Amazon (paid link)
Gebildet DC 12V 4 Channel Relay Module Board Shield Support High or Low Level Compatible Development Board Trigger with Optocoupler Isolation	This 12V 4-channel relay module is perfect for makers, hobbyists, and developers who need a reliable and versatile board for their projects. It’s ideal for ARM, PIC, AVR, MCU, Raspberry Pi, and CNC machines, offering strong driving capability and stable performance with optocoupler isolation.	View on Amazon (paid link)
AEDIKO 4pcs DC 12V Relay Module 2 Channel Relay Board with Optocoupler Support High or Low Level Trigger	The AEDIKO 4pcs DC 12V Relay Module is perfect for DIY enthusiasts and makers who need a reliable and easy-to-use solution for controlling high-power devices. It’s also great for students and hobbyists working on microcontroller projects.	View on Amazon (paid link)
GUETNEU Relay Board, 16 Channel 1 SPDT DIN Rail Mount 24V DC/AC Relay, Interface Board	This GUETNEU Relay Board is perfect for anyone needing to control multiple devices or circuits safely and efficiently. It’s ideal for PLC systems, microprocessors, or time relays, offering reliable performance and easy installation.	View on Amazon (paid link)
LiftMaster CAP4AP Smart Access Controller – Outdoor WiFi & PoE Gate/Door Control Panel, 4 Relays, Wiegand & OSDP Support, Cloud-Based myQ Access System	The LiftMaster CAP4AP Smart Access Controller is perfect for property managers, business owners, and community leaders who need reliable, centralized control over gates, doors, and multiple entry points. Its durable, weather-resistant design and cloud-based management make it ideal for outdoor use in commercial or community settings.	View on Amazon (paid link)
30A 4 Channel Relay Module Expansion Board for DSP AVR ARM (12VDC)	This 30A 4 Channel Relay Module is perfect for anyone who needs reliable control of high-current devices. It’s ideal for smart home projects, industrial applications, or DIY electronics where stability and compatibility matter most.	View on Amazon (paid link)
GUETNEU Relay Board, Relay Module 1 Channel 1 SPDT DIN Rail Mount 24V DC/AC, Interface Board(FY-T731C-D24)	This GUETNEU Relay Board is perfect for anyone needing a reliable, easy-to-install solution to control and protect their electrical systems. It’s ideal for PLCs, microprocessors, and time relays, offering safety features like over voltage protection and clear LED indicators.	View on Amazon (paid link)
GUETNEU Relay Board, Relay Module 2 Channel 1 SPDT DIN Rail Mount 24V DC/AC, Interface Board(FY-T732C-D24)	This GUETNEU Relay Board is perfect for anyone needing a reliable and safe way to control electrical loads. It’s ideal for PLC systems, microprocessors, and time relays, offering easy installation and clear operation for both beginners and experts.	View on Amazon (paid link)
Electronics-Salon 4 DPDT Signal Relay Module Board, DC 12V Version, for Arduino Raspberry-Pi 8051 PIC.	This 4 DPDT Signal Relay Module Board is perfect for hobbyists and makers who love working with Arduino, Raspberry Pi, 8051, or PIC. It’s ideal for projects needing reliable signal switching with high-quality relays and easy connections.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 4 Relay Output Boards for access systems, carefully selected based on expert reviews and customer feedback. Each product is evaluated for performance, features, and value, ensuring you find the perfect fit for your needs. Whether you prioritize reliability, affordability, or ease of use, this guide has you covered.

1. Seco-Larm PD-4BTQ Enforcer Access Power Controller Board; 4 Outputs; for 12/24 VAC/VDC Operation; Each Output Individually Fused; Individual Status LEDs; Dry and Wet Trigger Inputs

Seco-Larm PD-4BTQ Enforcer Access Power Controller Board; 4 Outputs; for 12/24 VAC/VDC Operation; Each Output Individually Fused; Individual Status LEDs; Dry and Wet Trigger Inputs

The Seco-Larm PD-4BTQ Enforcer Access Power Controller Board is a reliable and versatile solution for access control systems. It offers four outputs for 12/24 VAC/VDC operation, making it compatible with various power supplies.

Each output is individually fused and controlled, ensuring safety and flexibility. With fail-safe and fail-secure modes, it adapts to different security needs. The auxiliary interface allows for emergency egress and alarm monitoring, enhancing its functionality.

This controller board is easy to integrate with ENFORCER Access Control Power Supplies. Its dry and wet trigger inputs provide multiple activation options. A great choice for secure and efficient access control.

Pros	Cons
Four outputs, individually fused for safe, reliable operation. Works with 12/24 VAC/VDC, fits many systems. Dry and wet trigger inputs for flexible control. Auxiliary interface enables emergency egress and alarm monitoring.	Limited to 4 outputs, may not suit larger systems. No built-in power supply, requires separate purchase. Complex setup for beginners, professional help needed.

Perfect For:

The Seco-Larm PD-4BTQ Enforcer Access Power Controller Board is perfect for anyone needing reliable access control. It’s ideal for systems using 12/24 VAC/VDC power and works great with ENFORCER power supplies.

Ready to Purchase?

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2. SunFounder Lab 4 Relay Module 5V 4 Channels Relay Module Compatible with Arduino R3 1280 Arm PIC AVR STM32

The SunFounder Lab 4 Relay Module is a 5V 4-channel relay board. It works with Arduino R3, 1280, Arm, PIC, AVR, and STM32.

This module can control appliances with large currents. Each channel needs 15-20mA to work. It’s easy to use for projects.

Suitable for ages 14 and up, it’s a great tool for learning. The brand is SunFounder, known for quality products.

Pros	Cons
Control 4 devices with one module, easy and efficient. Safe for ages 14+, perfect for learning and projects. Works with Arduino and other boards, versatile and compatible. Handles large currents, great for appliances and equipment.	Not for kids under 14 – Safety first, keep it away from young ones. High current needed – Requires 15-20mA driver current for each channel. Limited compatibility – Works only with specific systems, check before buying.

Perfect For:

This SunFounder Lab 4 Relay Module is perfect for hobbyists, students, and makers who want to control high-current devices with their Arduino or other microcontroller projects. It’s easy to use and great for learning about relays and automation.

Ready to Purchase?

View Price on Amazon (paid link)

3. Gebildet DC 12V 4 Channel Relay Module Board Shield Support High or Low Level Compatible Development Board Trigger with Optocoupler Isolation

Gebildet DC 12V 4 Channel Relay Module Board Shield Support High or Low Level Compatible Development Board Trigger with Optocoupler Isolation

The Gebildet 12V 4-Channel Relay Module is a powerful tool for controlling devices. It works with high or low signals and has optocoupler isolation for safety. This board is easy to use and reliable.

It handles AC 250V/10A or DC 30V/10A loads, making it versatile. The board has indicators for power and relay action. You can switch between TTL and ground with a jumper.

This relay board is fault-tolerant and stable. It’s compatible with ARM, PIC, AVR, MCU, Raspberry Pi, and CNC machines. Perfect for projects needing precise control.

Pros	Cons
Handles high loads safely with AC 250V/10A and DC 30V/10A capacity. Optocoupler isolation ensures stable, reliable performance and protects your device. Easy setup with screw terminals and jumper selection for high/low signals. Wide compatibility with ARM, PIC, AVR, MCU, Raspberry Pi, and more.	No built-in protection against voltage spikes or reverse polarity. Requires external power supply for operation, not plug-and-play. Limited to 12V, not compatible with higher voltage systems.

Perfect For:

This 12V 4-channel relay module is perfect for makers, hobbyists, and developers who need a reliable and versatile board for their projects. It’s ideal for ARM, PIC, AVR, MCU, Raspberry Pi, and CNC machines, offering strong driving capability and stable performance with optocoupler isolation.

Ready to Purchase?

View Price on Amazon (paid link)

4. AEDIKO 4pcs DC 12V Relay Module 2 Channel Relay Board with Optocoupler Support High or Low Level Trigger

The AEDIKO 4pcs DC 12V Relay Module is a 2-channel relay board with optocoupler support. It works with high or low-level triggers. This module is easy to use and reliable.

It has a maximum load of AC 250V/10A and DC 30V/10A. The trigger current is only 5mA, making it energy-efficient.

The module is fault-tolerant and optically isolated. It comes with a screwed terminal plate and fixed bolt holes. You can connect it to microcontrollers and control it easily.

Pros	Cons
2-channel relay module for easy control of multiple devices. Optocoupler ensures reliable and stable triggering. Fault-tolerant design prevents unwanted relay movement. Screwed terminals and bolt holes for secure installation.	No built-in cooling for high-load use. Requires external power supply, not included. Limited compatibility with non-standard microcontrollers.

Perfect For:

The AEDIKO 4pcs DC 12V Relay Module is perfect for DIY enthusiasts and makers who need a reliable and easy-to-use solution for controlling high-power devices. It’s also great for students and hobbyists working on microcontroller projects.

Ready to Purchase?

View Price on Amazon (paid link)

5. GUETNEU Relay Board, 16 Channel 1 SPDT DIN Rail Mount 24V DC/AC Relay, Interface Board

The GUETNEU Relay Board is a 16-channel device for controlling circuits. It works with 24V DC/AC power sources. Use it to protect control systems and amplify current.

It has 16 independent channels for separate control. Each relay is built with high-grade nylon for durability. Silver-alloy contacts ensure reliable performance.

Installation is easy with optional channel setups. It fits in narrow spaces like walls. LED indicators show relay status, and safety features protect against over voltage and surges.

Pros	Cons
16 Channels for independent control of devices and circuits. Premium Build ensures durability and reliable performance. Easy Installation with flexible channel options and compact design. Safety Features include LED indicators and surge protection.	Limited to 24V power source, may not suit all setups. No built-in programming or automation features included. Bulkier design, might not fit tight spaces easily.

Perfect For:

This GUETNEU Relay Board is perfect for anyone needing to control multiple devices or circuits safely and efficiently. It’s ideal for PLC systems, microprocessors, or time relays, offering reliable performance and easy installation.

Ready to Purchase?

View Price on Amazon (paid link)

6. LiftMaster CAP4AP Smart Access Controller – Outdoor WiFi & PoE Gate/Door Control Panel, 4 Relays, Wiegand & OSDP Support, Cloud-Based myQ Access System

LiftMaster CAP4AP Smart Access Controller – Outdoor WiFi & PoE Gate/Door Control Panel, 4 Relays, Wiegand & OSDP Support, Cloud-Based myQ Access System

The LiftMaster CAP4AP Smart Access Controller is a cloud-connected system for gates, doors, and multi-entry properties. It offers centralized management via the myQ app, making access control simple and efficient.

This outdoor-rated controller is durable and weather-resistant, perfect for commercial and community use. It supports Wiegand and OSDP readers, allowing flexible integration with up to 4 credential readers.

The kit includes a smart controller unit, control board, expansion board, power supply, and mounting hardware. It’s ready to install and easy to set up.

Pros	Cons
Cloud-connected for centralized control of gates, doors, and more. Weather-resistant design, perfect for outdoor use. Flexible integration with Wiegand and OSDP readers. 4 relays to manage multiple access points easily.	Cloud-based system may have lag or connection issues. Outdoor use requires extra care in extreme weather. Complex setup might need professional help.

Perfect For:

The LiftMaster CAP4AP Smart Access Controller is perfect for property managers, business owners, and community leaders who need reliable, centralized control over gates, doors, and multiple entry points. Its durable, weather-resistant design and cloud-based management make it ideal for outdoor use in commercial or community settings.

Ready to Purchase?

View Price on Amazon (paid link)

7. 30A 4 Channel Relay Module Expansion Board for DSP AVR ARM (12VDC)

Upgrade your projects with the 30A 4 Channel Relay Module Expansion Board. It’s built tough with a 9.5mm black barrier terminal for top-quality design. Enjoy exceptional stability thanks to its miniature optocoupler, ensuring anti-interference performance.

Control large currents with ease—AC 250V/30A or DC 30V/30A. Choose 5V, 12V, or 24V to fit your needs. Works with MCU, PLC, and smart home systems for broad compatibility.

Pros	Cons
30A high-current handling for powerful control. Stable performance with top-quality optocoupler design. Versatile use in smart homes, industry, and MCUs. Optional voltages (5V, 12V, 24V) for custom needs.	No built-in protection against overcurrent or short circuits. Requires external power supply, adding setup complexity. Limited voltage options (5V, 12V, 24V) may not suit all needs.

Perfect For:

This 30A 4 Channel Relay Module is perfect for anyone who needs reliable control of high-current devices. It’s ideal for smart home projects, industrial applications, or DIY electronics where stability and compatibility matter most.

Ready to Purchase?

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8. GUETNEU Relay Board, Relay Module 1 Channel 1 SPDT DIN Rail Mount 24V DC/AC, Interface Board(FY-T731C-D24)

The GUETNEU Relay Board is a 1-channel SPDT module designed for DIN rail mounting. It works with 24V DC/AC power and handles 10A loads. This compact board fits in tight spaces like walls.

It’s easy to install and safe to use, with LED indicators and protection features. The clear labeling ensures simple operation. Customer support is available for any questions.

Pros	Cons
Amplifies control current, protects key systems from damage. Easy DIN rail mount, fits narrow spaces effortlessly. Clear labels and LED indicators for safe operation. Over voltage and surge protection for added safety.	Limited to 24V power source, may not suit all setups. No built-in testing tools for quick diagnostics. Requires careful spec check to avoid wrong purchase.

Perfect For:

This GUETNEU Relay Board is perfect for anyone needing a reliable, easy-to-install solution to control and protect their electrical systems. It’s ideal for PLCs, microprocessors, and time relays, offering safety features like over voltage protection and clear LED indicators.

Ready to Purchase?

View Price on Amazon (paid link)

9. GUETNEU Relay Board, Relay Module 2 Channel 1 SPDT DIN Rail Mount 24V DC/AC, Interface Board(FY-T732C-D24)

The GUETNEU Relay Board is a 2-channel relay module designed for DIN rail mounting. It works with 24V DC/AC power sources. This board is easy to install and fits in narrow spaces.

It amplifies current for output loads, protecting control systems. The rated load current is 10A at 250VAC/30VDC. It’s safe to use with over voltage and surge suppression protection.

Each board is clearly labeled with LED indicators. You can choose 1/2/4/8/16 channels for flexibility. If you have questions, customer service replies within 24 hours.

Pros	Cons
Amplifies current, protects control systems from damage. Easy DIN rail mount, fits narrow spaces effortlessly. LED indicators show relay status clearly and safely. Over voltage protection ensures safe operation always.	Limited to 24V power source, may not suit all setups. No built-in cooling for high-load applications. Requires careful spec check to avoid wrong purchase.

Perfect For:

This GUETNEU Relay Board is perfect for anyone needing a reliable and safe way to control electrical loads. It’s ideal for PLC systems, microprocessors, and time relays, offering easy installation and clear operation for both beginners and experts.

Ready to Purchase?

View Price on Amazon (paid link)

10. Electronics-Salon 4 DPDT Signal Relay Module Board, DC 12V Version, for Arduino Raspberry-Pi 8051 PIC.

The Electronics-Salon 4 DPDT Signal Relay Module Board is a powerful tool for your projects. It works with Arduino, Raspberry Pi, 8051, and PIC. This board uses high-quality relays for reliable performance.

It features TAKAMISAWA RY12W-K relays with gold overlay silver-palladium contacts. Darlington transistor circuits drive the relay coil efficiently. Each relay channel has an LED indicator for easy monitoring.

This module board is built to last with a FR-4 fiber glass PCB and dual copper layers. It includes a high-quality screw terminal block for secure connections. The DC 12V version is perfect for various electronics projects.

Pros	Cons
High-quality relays with gold-overlay contacts for reliable switching. LED indicators for easy monitoring of each relay channel. Durable FR-4 fiberglass PCB with dual copper layers. Screw terminal blocks ensure secure and easy connections.	No built-in protection against voltage spikes or reverse polarity. Requires external power supply, adding extra setup steps. Limited to DC 12V, not compatible with other voltage levels.

Perfect For:

This 4 DPDT Signal Relay Module Board is perfect for hobbyists and makers who love working with Arduino, Raspberry Pi, 8051, or PIC. It’s ideal for projects needing reliable signal switching with high-quality relays and easy connections.

Ready to Purchase?

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Buying Guide

Choosing the right 4-relay output board is key for a secure and smooth access control system. Let’s explore the top picks and factors to help you find the ideal match.

Factors to Consider When Buying:

Compatibility: Ensure the board works with your power supply and control system. Look for 12V, 24V, or dual voltage options.
Safety Features: Choose boards with individual fuses, optocoupler isolation, and surge protection for reliable operation.
Ease of Use: Look for clear labeling, LED indicators, and simple installation to save time and effort.
Flexibility: Opt for boards with multiple trigger options, fail-safe/fail-secure modes, and expandable channels for future needs.
Durability: Select boards with high-quality materials like FR-4 fiberglass or high-grade nylon for long-lasting performance.
Load Capacity: Check the maximum load (e.g., 10A, 30A) to ensure it handles your devices safely.
Integration: Ensure compatibility with Arduino, Raspberry Pi, or other systems for seamless project integration.
Brand Reputation: Choose brands known for quality and customer support to avoid hassles.