Structured Manufacturing Data (2026)

RS485 Communication Module

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard RS485 Communication Module 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 RS485 Communication Module is characterized by the integration of RS485 Transceiver IC and Termination Resistor. In industrial production environments, manufacturers listed on CNFX commonly emphasize Printed Circuit Board (PCB) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A hardware module that implements the RS485 serial communication standard for industrial data transmission.

View Full Specifications Explore Manufacturing Sources

Product Specifications

Technical details and manufacturing context for RS485 Communication Module

Definition
The RS485 Communication Module is an electronic device that facilitates serial communication using the RS485 standard, which is widely adopted in industrial automation and control systems. It enables reliable data exchange between multiple devices over long distances with high noise immunity, supporting multi-point network configurations where multiple transmitters and receivers can be connected on a single bus. This module typically converts signals between RS485 and other interfaces like RS232, USB, or Ethernet, making it essential for integrating various industrial equipment such as PLCs, sensors, and actuators into a unified communication network.
Working Principle
The RS485 Communication Module operates by converting digital data from a host device (e.g., a microcontroller or computer) into differential voltage signals as per the RS485 standard. It uses a balanced differential line driver to transmit data over a twisted-pair cable, where the voltage difference between the two wires represents logical states, providing high noise rejection. On the receiving end, a differential receiver interprets these voltage differences to reconstruct the original data. The module supports half-duplex or full-duplex communication, often incorporating features like automatic direction control, galvanic isolation, and surge protection to ensure reliable operation in harsh industrial environments.
Common Materials
Printed Circuit Board (PCB), Integrated Circuits (ICs), Connectors
Technical Parameters
  • Data transmission rate, typically ranging from 300 bps to 10 Mbps (bps) Customizable
Components / BOM
  • RS485 Transceiver IC Part
    Converts logic-level signals to RS485 differential signals and vice versa
    Material: Semiconductor silicon with plastic or ceramic packaging
  • Termination Resistor Part
    Prevents signal reflections at the end of the transmission line
    Material: Carbon or metal film resistor
  • Isolation Transformer
    Provides galvanic isolation to protect against ground loops and electrical noise
    Material: Ferrite core with copper windings
  • DB9 or Terminal Block Connector Part
    Interface for connecting the module to external devices and cables
    Material: Plastic housing with metal contacts
  • LED Indicators Part
    Visual status indicators for power, transmit, and receive activities
    Material: Plastic lens with semiconductor light-emitting diode

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for RS485 Communication Module.

RS485 Interface Module RS485 Converter RS485 Adapter RS485 Serial Module industrial RS485 communication module RS485 serial data transmission hardware isolated RS485 module for manufacturing long-distance RS485 communication board multi-node RS485 interface module

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
voltage: 5V DC ±5%
humidity: 5% to 95% non-condensing
data rate: Up to 10 Mbps
temperature: -40°C to +85°C
isolation voltage: 2500V RMS
Media Compatibility
✓ Industrial automation networks ✓ Building management systems ✓ Process control instrumentation
Unsuitable: High-voltage electrical substations with extreme EMI/RFI interference
Sizing Data Required
  • Required data transmission distance (meters)
  • Number of nodes in network
  • Required baud rate (bps)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Signal Degradation/Communication Loss
Cause: Electromagnetic interference (EMI) from nearby equipment, improper cable shielding, or ground loops causing signal corruption or complete communication failure.
Physical Connector/Port Failure
Cause: Corrosion due to moisture ingress, mechanical stress from repeated plugging/unplugging, or poor-quality connectors leading to intermittent or lost connections.
Maintenance Indicators
  • Intermittent or erratic data transmission (e.g., frequent timeouts, corrupted data packets) audible via diagnostic tools or visible on monitoring systems.
  • Visible corrosion, discoloration, or physical damage (e.g., bent pins, loose connections) at the module's ports or cable terminations.
Engineering Tips
  • Implement proper EMI shielding and grounding: Use shielded twisted-pair cables, ensure correct termination with resistors, and avoid running cables parallel to high-power sources to minimize interference.
  • Regularly inspect and maintain connections: Schedule periodic checks for corrosion, secure cable strain relief, and use dielectric grease on connectors in humid environments to prevent moisture ingress.

Compliance & Manufacturing Standards

Reference Standards
ISO 11898-2:2016 (Road vehicles - Controller area network (CAN) - Part 2: High-speed medium access unit) ANSI/TIA/EIA-485-A (Electrical Characteristics of Generators and Receivers for Use in Balanced Digital Multipoint Systems) DIN EN 61000-6-2 (Electromagnetic compatibility (EMC) - Part 6-2: Generic standards - Immunity standard for industrial environments)
Manufacturing Precision
  • Terminal pitch: +/-0.1mm
  • PCB trace width: +/-10% of nominal value
Quality Inspection
  • Bit Error Rate (BER) test under varying electrical noise conditions
  • Electrostatic Discharge (ESD) immunity test per IEC 61000-4-2

Factories Producing RS485 Communication Module

Manufacturer profiles with relevant production capability in China

Add your factory

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.

Supply Chain Commonly Integrated Components

Signal Processor

Electronic device that conditions, amplifies, filters, and converts raw sensor signals into standardized outputs for temperature measurement systems

Explore Specs →
Optical Spectrometer

An analytical instrument that measures the intensity of light as a function of wavelength to determine the elemental composition of materials.

Explore Specs →
Stereo Camera Array

A multi-camera system that captures synchronized images from multiple perspectives to enable 3D depth perception and pattern recognition.

Explore Specs →
Structured Light Projector

Optical device that projects precisely controlled light patterns onto surfaces for 3D scanning applications

Explore Specs →

Frequently Asked Questions

What is the maximum communication distance for this RS485 module?

The RS485 module supports communication distances up to 1200 meters, making it ideal for industrial applications requiring long-range data transmission between devices.

How many nodes can this RS485 communication module support?

This module supports up to 32 nodes on a single bus, allowing multiple devices to communicate efficiently in industrial automation and control systems.

What isolation features does this RS485 module provide?

The module includes an isolation transformer providing up to 2500V isolation, protecting sensitive electronic components from electrical noise and ground potential differences in industrial environments.

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.

Request Manufacturing Insight for RS485 Communication Module

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for RS485 Communication Module.

Your business information is used only to process this request.

Thank you! Your message has been sent. We'll respond within 1–3 business days.
Thank you! Your message has been sent. We'll respond within 1–3 business days.

Need to Manufacture RS485 Communication Module?

Compare manufacturer profiles with relevant product and process capability.

Create Manufacturer Profile Contact Us
Previous Product
Routing Switch
Next Product
Rugged Enclosure