Structured Manufacturing Data (2026)

Serial Interface

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Serial Interface used in the Computer, Electronic and Optical Product Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Serial Interface is characterized by the integration of UART (Universal Asynchronous Receiver/Transmitter) and Line Driver/Transceiver. In industrial production environments, manufacturers listed on CNFX commonly emphasize FR-4 PCB construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A communication interface that transmits data sequentially, one bit at a time, over a single channel.

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Product Specifications

Technical details and manufacturing context for Serial Interface

Definition
The Serial Interface within a Modbus Gateway serves as the physical and protocol layer for serial communication, enabling the gateway to connect to and exchange data with field devices (such as sensors, actuators, or PLCs) using serial protocols like RS-232, RS-485, or RS-422. It handles the conversion between serial data streams and the internal data representation of the gateway, facilitating integration into Modbus TCP/IP networks.
Working Principle
The interface operates by converting parallel data from the gateway's internal bus into a serial bit stream for transmission, and vice-versa for reception. It manages timing (baud rate), framing (start/stop bits), error checking (parity), and electrical signaling according to the specific serial standard (e.g., RS-485 for multi-drop networks). Within the Modbus Gateway, it implements the physical layer of the Modbus RTU or ASCII protocol.
Common Materials
FR-4 PCB, Integrated Circuit (UART/Transceiver), Copper Traces, Connector (e.g., DB9, Terminal Block)
Technical Parameters
  • Interface Type (e.g., RS-232, RS-485, RS-422), Data Rate (Baud Rate), Data Bits, Stop Bits, Parity, Number of Ports, Connector Type, Isolation Voltage Per Request
Components / BOM
  • UART (Universal Asynchronous Receiver/Transmitter) Part
    Converts parallel data from the gateway's processor to serial data for transmission, and serial data from the line to parallel data for the processor.
    Material: Silicon (Integrated Circuit)
  • Line Driver/Transceiver
    Converts the UART's logic-level signals to the appropriate voltage levels and electrical characteristics for the specific serial standard (e.g., RS-485 differential signaling).
    Material: Silicon (Integrated Circuit)
  • Connector
    Provides the physical connection point for serial cables (e.g., DB9, screw terminal block).
    Material: Metal (contacts), Plastic (housing)
  • Isolation Barrier (optional)
    Provides galvanic isolation between the serial interface circuitry and the gateway's internal electronics to protect against ground loops and electrical noise.
    Material: Optocouplers, Isolation Transformers

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Serial Interface.

COM Port RS-232 Port industrial serial communication interface UART transceiver PCB design DB9 connector serial interface asynchronous data transmission module electronic manufacturing serial port

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Modbus Gateway
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: Not applicable (electronic interface)
other spec: Data rate: 300 bps to 115.2 kbps (standard RS-232), up to 10 Mbps (RS-422/485)
temperature: -40°C to +85°C (industrial grade)
Media Compatibility
✓ Industrial control systems (PLC communication) ✓ Legacy manufacturing equipment ✓ Point-of-sale terminals
Unsuitable: High-EMI environments without proper shielding
Sizing Data Required
  • Required data transmission rate (bps)
  • Maximum cable length needed
  • Interface standard (RS-232, RS-422, RS-485)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Signal Degradation
Cause: Corrosion or contamination of connector pins, leading to increased electrical resistance and intermittent data transmission failures.
Mechanical Wear
Cause: Repeated mating/unmating cycles causing pin misalignment, bent pins, or connector housing damage, resulting in poor electrical contact.
Maintenance Indicators
  • Intermittent or garbled data transmission despite proper software configuration
  • Visible corrosion, bent pins, or loose connections on the serial connector
Engineering Tips
  • Implement regular cleaning of connector pins with appropriate contact cleaner and protect with dielectric grease to prevent corrosion
  • Use strain relief on cables and ensure proper alignment during mating to prevent mechanical stress on connectors

Compliance & Manufacturing Standards

Reference Standards
ISO/IEC 21118:2020 - Information technology - Serial interfaces ANSI/TIA-232-F - Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange DIN 66020-1 - Interface for data transmission; serial interface for data terminal equipment
Manufacturing Precision
  • Connector pin alignment: +/-0.1mm
  • Signal timing jitter: < 5% of bit period
Quality Inspection
  • Signal integrity test (eye pattern analysis)
  • Environmental stress screening (temperature/humidity cycling)

Factories Producing Serial Interface

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What are the primary applications of serial interfaces in computer and optical product manufacturing?

Serial interfaces are essential for legacy system integration, industrial automation control, embedded system communication, diagnostic port access, and low-speed peripheral connectivity in manufacturing environments.

How does the UART component function within a serial interface design?

The UART (Universal Asynchronous Receiver/Transmitter) converts parallel data from the host system to serial data for transmission and vice versa, managing start/stop bits, parity checking, and data framing without requiring a clock signal.

What advantages do serial interfaces offer over parallel interfaces in industrial applications?

Serial interfaces provide longer transmission distances, reduced cable complexity, lower cost through fewer conductors, better noise immunity in industrial environments, and compatibility with legacy equipment while maintaining reliable data transfer.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Computer, Electronic and Optical Product Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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