Can I contact factories directly on CNFX?

CNFX is an open directory. Each factory profile provides direct contact information.

Serial Interface Component – Computer, Electronic and Optical Product Manufacturing

Component Specifications

Definition

A standardized serial communication interface component in Industrial IoT Gateways that enables bidirectional data exchange between modern IoT systems and legacy industrial equipment. It implements asynchronous serial protocols (RS-232, RS-422, RS-485) with industrial-grade electrical isolation, supporting data rates up to 115.2 kbps over distances up to 1200 meters. The interface includes surge protection, ESD shielding, and galvanic isolation up to 2500V RMS for harsh industrial environments.

Working Principle

Converts parallel data from the gateway's processor into serial bit streams using UART (Universal Asynchronous Receiver/Transmitter) technology. Implements voltage-level shifting and differential signaling (for RS-422/485) to transmit data as sequential electrical pulses over twisted-pair cables. Includes error detection through parity bits and supports multi-drop configurations (RS-485) for connecting multiple devices on a single bus.

Materials

PCB: FR-4 glass epoxy laminate with 2oz copper; Connectors: Industrial-grade DB9 or terminal blocks with gold-plated contacts; Isolation: Optocouplers (6N137) for signal isolation, DC-DC converters for power isolation; Protection: TVS diodes (SMBJ series), gas discharge tubes, ferrite beads; Housing: Aluminum alloy with IP67-rated sealing.

Technical Parameters

Data Rate 300 bps to 115.2 kbps
Protocols RS-232, RS-422, RS-485
Connector Type DB9 female or screw terminal
ESD Protection ±15kV (air), ±8kV (contact)
Surge Protection 1kV (line-to-line), 2kV (line-to-ground)
Isolation Voltage 2500V RMS
Operating Voltage 5V DC ±10%
Temperature Range -40°C to +85°C

Standards

ISO/IEC 8482, TIA/EIA-232-F, TIA/EIA-422-B, TIA/EIA-485-A, IEC 61000-4-2, IEC 61000-4-5

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Serial Interface.

Parent Products

This component is used in the following industrial products

Industrial IoT Gateway

Edge computing device connecting industrial equipment to cloud platforms.

View Product Details

Engineering Analysis

Risks & Mitigation

Electromagnetic interference in high-noise environments
Ground loop currents causing communication errors
Cable length exceeding specifications causing signal degradation
Incorrect termination causing signal reflections

FMEA Triads

Trigger: Voltage transients from industrial equipment
Failure: Interface circuit damage
Mitigation: Implement multi-stage protection (TVS diodes, gas tubes, ferrites) and regular surge testing

Trigger: Moisture ingress in harsh environments
Failure: Corrosion and short circuits
Mitigation: Use IP67-rated connectors and conformal coating on PCB

Trigger: Improper cable shielding
Failure: EMI-induced data errors
Mitigation: Specify shielded twisted-pair cables with proper grounding

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance

Signal timing: ±2% of bit period; Voltage levels: ±5% of specified values; Isolation resistance: >100MΩ at 500VDC

Test Method

IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), IEC 61000-4-5 (Surge), TIA/EIA-485-A electrical characteristics test

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

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.

Related Components

Main Processor

Central processing unit for industrial IoT gateways enabling real-time data processing and communication in manufacturing environments.

Memory Module

Memory module for Industrial IoT Gateway data storage and processing

Storage Module

Industrial-grade storage module for data logging and firmware in IoT gateways

Ethernet Controller

Industrial Ethernet controller for real-time data transmission in Industrial IoT Gateways.

Frequently Asked Questions

What is the maximum cable length for RS-485 communication?

Up to 1200 meters at 115.2 kbps with proper termination and cable quality (24 AWG twisted pair).

Can this interface connect to Modbus devices?

Yes, it supports Modbus RTU protocol over RS-485 for connecting PLCs, drives, and sensors.

How many devices can connect to a single RS-485 port?

Up to 32 unit loads (256 devices with high-impedance transceivers) in multi-drop configuration.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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.

Serial Interface