Wholesale 16-Channel Relay Boards for Sale in South Africa - Bulk Supply from Communica

Overview: 16-Channel Relay Boards in Bulk

Expanding on industrial automation, security systems, IoT projects, or educational lab kits? 16-channel relay boards offer a compact, cost-effective way to control many independent circuits via a single microcontroller or PLC. With wholesale purchase options from Communica, South African organisations access bulk pricing, consistent stock, and technical assistance-streamlining rollout for smart building control, large-scale makerspaces, or OEM manufacturing.

Typical Applications

• Industrial process control (motors, pumps, valves)
• Building automation (lighting, HVAC zones, access)
• IoT smart home platforms
• Education & FET/university labs (training panels, PLC rigs)
• Security panels, alarm routing

Relay Board Specifications & Brand Options

16-channel relay boards are primarily available in 5V, 12V, and sometimes 24V coil variants. Choose based on your control logic voltage or available power rail. Look for reliable switching ratings (e.g., 10A @ 250VAC/30VDC per channel), compatible interface inputs (TTL, opto-isolated, or transistor-driven), and robust PCB layout for high-uptime operation.

Key Features to Consider

• LED channel status indicators and PCB test points
• Screw terminal outputs (3.81/5.08mm pitch)-easy wiring for field or prototype use
• Opto-isolation between logic and relay power for protection
• Header compatibility (jumper for active-high/low trigger)

Compatibility & Integration Tips

Before buying wholesale, ensure the relay boards work with your controller: whether Arduino, ESP32, Raspberry Pi, or industrial PLC. Confirm your microcontroller can sink (or source) enough current for all 16 channels, especially if switching simultaneously. Use external 5V/12V supplies where possible to minimize inrush effects.

Example Wiring Diagram

+5V (Power Supply) ---> [Relay Board VCC]
GND (Common) ------> [Relay Board GND]
Digital Out (MCU) --> [IN1..IN16 Header Pins]

Bulk Purchase & Local Support at Communica

• Wholesale pricing: Register for an organisation/procurement account to access tiered discounts.
• Branch pickup: Collect bulk orders from Samrand, Pretoria CBD, or Cape Town outlets. Check Branches & Trading Hours for collection planning.
• Technical queries: Get pre-sale advice on relay board selection, specs, and integration challenges for South African electrical grids.
• Stock checks: Use online inventory tools to confirm availability or request a lead-time estimate if quantity exceeds ex-stock supply.
• Account features: VAT-compliant invoicing, quote requests, and credit terms for schools/industry.

Accessory Bundles Available

• Jumper wire/protoboard packs
• Dedicated 5V/12V power adapters
• Relay sockets and DIN rail mounting kits
• Spares: fuses, ferrules, and test/measurement accessories

Why Choose Communica?

• Decades-long expertise supporting bulk SA rollouts for industry and education
• Readily available local stock-no lengthy import waits for vital hardware
• Access to leading global and maker brands
• Support in English and Afrikaans on technical documentation and queries

Order Process Overview

• Browse online and filter by relay board voltage/model
• Add quantity for bulk pricing or request a formal quotation
• Arrange branch pickup or track courier delivery, with support throughout

Sources

• Relay Boards Category - Communica
• Branches & Trading Hours - Communica
• About Us - Communica
• 16-Channel Relay Module Specs - SainSmart