Screw Terminal Block Breakout Expansion Shield Kit for Arduino UNO R3 / Mega 2560

Screw Terminal Block Breakout Expansion Shield Kit for Arduino UNO R3 / Mega 2560 is a heavy-duty industrial wire-termination shield kit that converts the fragile female header sockets of an Arduino UNO R3 or Mega 2560 into vibration-proof 2.54mm/3.5mm screw terminal blocks. Furthermore, it spans the full 84-pin Mega 2560 / UNO R3 perimeter and includes a large central plated through-hole perfboard area, an onboard power switch, a reset button, and modular 2-pin/3-pin screw terminal blocks with female stacking headers. Consequently, engineers can assemble a rock-solid industrial PLC wiring interface where field sensor and actuator leads never vibrate loose.

Key Features:

• Dual UNO R3 & Mega 2560 Compatibility: Extended L-wing PCB layout covers both the standard 32-pin Arduino UNO R3 headers and the full 54-digital / 16-analog header banks of the Arduino Mega 2560 R3.
• Complete Modular Screw Terminal & Header Kit: Includes 24 × 3-pin and 6 × 2-pin interlocking screw terminal blocks plus matching female bug-strip headers (`1×36P, 5×8P, 1×10P`), tactile switch, and LED.
• Large Central Perfboard Prototyping Matrix: Over 200 plated through-hole solder pads in the center of the shield accommodate optocouplers, terminal pull-up resistors, MOSFETs, and DC-DC converters.
• Positive-Clamping Screw Terminals: Securely clamps 16–26 AWG solid or ferruled stranded field wires for industrial cabinet installations.
• Clear Double-Sided Silkscreen Pin Legend: Every terminal position (`D0–D53, A0–A15, VIN, 5V, 3.3V, GND, RST`) is clearly labeled on the PCB.

Technical Specifications:

• Compatible Host Boards: Arduino Mega 2560 R3, Arduino Due R3, and Arduino UNO R3
• Included Terminal Blocks: 24 × 3-Pin Screw Terminals + 6 × 2-Pin Screw Terminals (84 Total Screw Positions)
• Included Female Headers: 1 × 36-Pin (Dual-Row/Breakaway), 5 × 8-Pin, 1 × 10-Pin Female Header Strips
• Terminal Pitch: 2.54 mm (0.1 inch) High-Density Terminal Pitch
• Accepted Wire Gauge: 18 AWG to 26 AWG Solid or Stranded Wire
• Kit Format: Unsoldered DIY Kit (Allows Custom Top/Bottom Orientation of Terminals and Headers)

Mechanical Specifications:

• PCB Substrate: Industrial 1.6mm Double-Sided FR-4 Fiberglass PCB
• Onboard Controls: Tactile Reset Switch + Power Indicator LED
• Mounting Holes: 4 × M3 Mounting Holes Matching Mega 2560 / UNO Chassis Standoffs

Dimensions:

• Length: 108.0 mm
• Width: 56.0 mm
• Assembled Height: ≈ 20.0 mm
• Weight: ≈ 68 g (Complete Kit)

Pinout and Wiring:

• Assembly Step 1 (Interlock Terminals): Slide the dovetail grooves of the 2-pin and 3-pin screw terminal blocks together to match each PCB bank length before inserting them into the outer PCB holes with the wire mouths facing outward.
• Assembly Step 2 (Header Soldering): Insert the male pins into your Mega 2560/UNO headers to hold them straight while soldering the pins and screw terminals to the shield PCB.
• Field Wiring: Strip 5mm of insulation from your sensor/actuator wires, insert into the labeled screw terminal (`D0–D53`, `A0–A15`, `5V`, or `GND`), and tighten with a flathead screwdriver.
• Engineering Precaution: Always interlock the individual 2-pin and 3-pin terminal blocks together BEFORE soldering them to the PCB; soldering them one by one without interlocking will prevent the adjacent dovetail slots from sliding together smoothly.

Datasheet Reference:

• View Official Arduino Mega 2560 R3 Mechanical & Pinout Specification PDF

Commonly Used in:

• Industrial Automation Enclosures, CNC Control Cabinets, and PLC Retrofits
• MobiFlight & SimVim Flight Simulator Cockpit Wiring Harnesses
• Permanent Architectural Lighting, Escape Room, and Greenhouse Controllers

Applications:

• Vibration-Proof Machine Wiring: Replaces fragile push-in DuPont jumper wires that shake loose inside mobile robots, vehicles, and CNC routers.
• Flight Simulator Switch Panels: Terminates 50+ toggle switches, rotary encoders, and annunciator LEDs cleanly onto an Arduino Mega 2560.
• Custom Signal Conditioning Carrier: Uses the central perfboard area to solder 4-20mA current-loop shunt resistors and 24V-to-5V voltage dividers right next to the screw terminals.

Equivalent Models:

• XD-216 Screw Shield V1 (2-Piece Wing Set): Pre-soldered 2-wing screw terminal shield specifically for the 32-pin Arduino UNO R3 (does not cover Mega pins D22–D53).
• Screw Shield V2 Terminal Expansion Board for UNO: Single-piece pre-soldered UNO R3 screw shield with central perfboard area.
• Arduino Mega 2560 Sensor Shield V2.0: Breaks out all Mega 2560 pins to 3-pin GVS male DuPont headers instead of screw terminals.

Package Includes:

• 1 × Screw Terminal Block Breakout Expansion Shield Kit for Arduino UNO R3 / Mega 2560