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CONNODER - Your Reliable Connection Expert

M16 Circular Connectors

A high-reliability connection solution for industrial equipment, supporting signal, power, and multi-pin connection requirements

The CONNODER M16 circular connector is a connection solution widely used in industrial automation, communications, military, and other demanding environments.  Its design delivers high reliability, high durability, and excellent protection to meet the needs of diverse applications. With a rich range of pin configurations, flexible mounting options, and customized cable assembly services, the M16 circular connector meets the complex connection requirements of automation equipment, machinery manufacturing, control systems, and intelligent equipment. The M16 circular connector was originally developed to meet the requirements of the German standards body (DIN standard), which established a standard for circular connectors carrying analog audio signals. They have been widely used for many years and are well known through the audio industry — what consumers call DIN standard connectors.

✔M16×0.75 threaded locking mechanism
✔Supports mixed signal + power transmission
✔Supports overmolded cable assemblies
✔High protection rating: IP67 / IP68
✔2–24-pin configurations
✔Supports OEM/ODM customization

What is an M16 Circular Connector?

An M16 circular connector is an industrial connector with a 16 mm mounting size, mainly used for signal, power, and multi-channel data connections between equipment.

Compared with M12 circular connectors, the M16 offers a larger mounting space and higher contact capacity, supporting more pins and more complex connection requirements.

The M16 circular connector typically uses a threaded locking mechanism to improve vibration resistance during equipment operation, and achieves IP67/IP68 protection through its sealing design.

 

M16 Connectors at a Glance

✔Standard connection interface for industrial automation ✔Used for sensors, PLCs, and I/O modules ✔Supports industrial Ethernet (PROFINET / EtherCAT) ✔Multi-pin design ✔Suitable for harsh industrial environments

M16 Circular Connector Product Series

Full-scenario coverage, meeting the connection needs of industrial equipment, power control, and automation systems

M16 Panel-Mount Connector (PCB Solder Version)

M16 panel-mount connector (PCB solder version)

Designed specifically for internal PCB connections, featuring a standard M16 mounting structure for reliable connection between the connector and the control circuit board. Ideal for internal interfaces in industrial control equipment, automation instruments, inspection equipment, and intelligent devices.

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M16 Panel-Mount Connector (Wire-Solder Version)

M16 panel-mount connector (wire-solder version)

Featuring a convenient solder connection method, it offers equipment manufacturers a more flexible and easy installation solution. Compared with the PCB solder version, the wire-solder structure requires no circuit board connection and can be wired directly to internal equipment circuits, making it ideal for industrial equipment with limited space or fast assembly requirements.

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M16 Field-Assemblable Metal Plug

M16 field-assemblable metal plug

Featuring a high-strength metal housing, it supports quick field assembly, allowing cable length and wire definitions to be freely configured to device requirements. The metal construction offers excellent mechanical strength and environmental resistance, suitable for long-term operation in industrial field environments.

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M16 Overmolded Cable Assemblies

M16 overmolded cable assembly

Using professional overmolding technology, the M16 connector and cable are encapsulated as one integrated unit, providing a stable and reliable industrial-grade connection solution. The overmolded structure effectively enhances waterproof performance and mechanical strength, reduces on-site installation time, and is ideal for volume applications in automation equipment.

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M16 Connector Pin Count Selection Guide

M16 2-24 Pin Connector Selection Guide

2-3 PIN Basic Power
  • Simple power transmission
  • Basic control circuits
4 PIN Signal Sensing
  • Sensor signal input
  • Basic I/O signals
5 PIN Multi-Channel Control
  • Combined multi-signal control
  • General industrial equipment
8 PIN Complex Systems
  • Complex control systems
  • Multi-axis / multi-channel drives
12-24 PIN Multi-Function Integration
  • Multi-function automation equipment
  • Precision instruments and test equipment
  • High-density mixed signal/power

M16 Engineering Selection Guide

Complete your configuration in 5 steps, no need to wait for technical support

1
Define the Application Type
Signal Transmission Power Mixed Connection
2
Define the Pin Count
2 Pin 3 Pin 4 Pin 5 Pin 6 Pin 7 Pin 8 Pin 12–24 Pin
3
Define the Mounting Type
Cable Connection Panel Mount Overmolded Cable
4
Define the Environmental Protection Rating
IP67
Standard Industrial Environments
Indoor equipment · control cabinets · automated production lines
Dust protection + temporary immersion protection
IP68
Harsh / Outdoor Environments
Outdoor exposure · high dust · frequent washdown
Long-term immersion + pressure-resistant sealing
5
Define Customization Needs
All options below support on-demand customization — just note it when placing your order
Cable Length · 0.5 m – 20 m available Connector Color · black / green / red / custom Pin Definition · standard wiring / custom per drawing

CONNODER Manufacturing Strength

From mold development to outgoing inspection, the entire process is under our own control, ensuring the precision and reliability of every M9 connector

Mold Development
Our in-house tool room is equipped with wire-cut EDM and mirror spark erosion machines, achieving mold precision of ±0.005 mm and 48-hour rapid sampling, ensuring product consistency from the source.
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Precision Injection Molding
Imported vertical injection molding machines in a temperature- and humidity-controlled workshop ensure dimensionally stable plastic parts free of flash, meeting the M9 connector's high requirements for sealing and mating feel.
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CNC Machining
Multi-axis CNC machining centers precisely turn metal housings and contacts, keeping thread tolerances within ±0.01 mm to ensure smooth locking and shielding integrity.
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Automated Assembly
Fully automated assembly lines integrate vision positioning and torque control, with a capacity of over 3,000 pcs/hour, eliminating manual assembly errors and ensuring consistent batch quality.
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In-line Inspection
In-line CCD vision inspection and electrical testing stations screen defects such as contact misalignment and insulation faults in real time; defective parts are automatically rejected, preventing defects from flowing to the next process.
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Outgoing Inspection
Each batch undergoes IP67 waterproof air-tightness testing, 500-cycle mating life verification, and salt spray testing. All inspection reports are provided with shipment, with fully traceable data.
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Packaging & Shipping
Triple protection with antistatic trays, individual PE bags, and shockproof outer cartons; labels include batch numbers and QR codes, supporting MES scan-in, with end-to-end logistics tracking.
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Quality Management
ISO 9001 certified, implementing SPC (Statistical Process Control) with critical process CPK ≥ 1.33, driving zero-defect delivery through continuous improvement.
Production process diagram
Insertion and extraction force tester
Programmable constant temperature and humidity test chamber