Structured Manufacturing Data (2026)

Backplane

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Backplane used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Backplane is characterized by the integration of PCB (Printed Circuit Board) and Edge Connectors / Slots. In industrial production environments, manufacturers listed on CNFX commonly emphasize FR-4 (Flame Retardant 4) Glass Epoxy construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A printed circuit board that provides electrical and mechanical connections for multiple modules in a Programmable Logic Controller (PLC) rack.

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Product Specifications

Technical details and manufacturing context for Backplane

Definition
The backplane is a critical component within a Programmable Logic Controller (PLC) rack, serving as the central communication and power distribution backbone. It provides standardized slots and connectors that allow various PLC modules (such as CPU, I/O, communication, and power supply modules) to be installed, interconnected, and powered. It facilitates high-speed data exchange between modules and ensures reliable system operation in industrial automation environments.
Working Principle
The backplane operates by providing a set of parallel electrical pathways (buses) embedded within a printed circuit board. When a module is inserted into a slot on the rack, its edge connector mates with the corresponding connector on the backplane. This establishes connections for power, ground, data, address, and control signals. The backplane's bus architecture allows all connected modules to communicate with the central processing unit (CPU) and with each other according to the PLC's communication protocol (e.g., proprietary backplane bus, PCI, etc.).
Common Materials
FR-4 (Flame Retardant 4) Glass Epoxy, Copper (for traces), Gold or Tin plating (on connectors)
Technical Parameters
  • Number of module slots available on the backplane, determining the maximum expandability of the PLC rack. (slots) Standard Spec
Components / BOM
  • PCB (Printed Circuit Board) Part
    The substrate that holds and electrically connects all other components via etched copper traces.
    Material: FR-4 Glass Epoxy
  • Edge Connectors / Slots Part
    Provide the physical and electrical interface for PLC modules to connect to the backplane bus.
    Material: Plastic housing with metal (gold/tin plated) contacts
  • Bus Traces Part
    Copper pathways on the PCB that carry power, data, address, and control signals between connectors.
    Material: Copper
  • Termination Resistors Part
    Prevent signal reflections on high-speed bus lines to ensure signal integrity.
    Material: Ceramic, Metal Film
  • Mounting Holes Part
    Allow the backplane to be securely fastened to the PLC rack chassis.
    Material: N/A (features of the PCB)

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Backplane.

PLC rack backplane for industrial automation FR-4 glass epoxy backplane PCB programmable logic controller backplane board machinery equipment backplane with edge connectors industrial automation backplane with bus traces

Applied To / Applications

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

Programmable Logic Controller (PLC) Rack
View system integration details
Main PLC Rack
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PLC Rack/Chassis
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Routing Switch
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Signal Switching Matrix
View system integration details
Drive Array
View system integration details

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (non-pressurized electrical component)
other spec: Humidity: 5% to 95% non-condensing, Vibration: 5-500 Hz at 2G, Shock: 50G for 11ms
temperature: -40°C to +85°C
Media Compatibility
✓ Industrial control cabinets ✓ Clean manufacturing environments ✓ Temperature-controlled enclosures
Unsuitable: Corrosive chemical exposure or high particulate contamination
Sizing Data Required
  • Number of required module slots
  • Backplane bus architecture (e.g., PCIe, VME, custom)
  • Required power delivery capacity (watts per slot)

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Connector pin degradation
Cause: Cyclic thermal expansion/contraction causing fretting corrosion and loss of electrical contact integrity
PCB delamination
Cause: Moisture ingress combined with thermal cycling leading to separation of laminate layers and trace damage
Maintenance Indicators
  • Intermittent system errors or data corruption during vibration or thermal changes
  • Visible discoloration, warping, or charring around connector interfaces
Engineering Tips
  • Implement controlled environment storage with humidity below 40% RH and temperature stabilization before installation
  • Apply periodic contact resistance testing and thermal imaging during preventive maintenance cycles

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 (Quality Management Systems) IEC 61188-5-1 (Printed boards and assemblies - Design and use) IPC-6012 (Qualification and Performance Specification for Rigid Printed Boards)
Manufacturing Precision
  • Board Thickness: +/-10% of nominal
  • Hole Positional Tolerance: +/-0.1mm
Quality Inspection
  • Automated Optical Inspection (AOI) for solder joints and component placement
  • In-Circuit Test (ICT) for electrical continuity and functionality

Factories Producing Backplane

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 materials are used in this PLC backplane?

This backplane is constructed with FR-4 glass epoxy PCB material, copper traces for electrical conductivity, and gold or tin plating on connectors for durability and reliable connections in industrial environments.

How does a backplane connect modules in a PLC system?

The backplane provides both electrical and mechanical connections through edge connectors and slots, allowing multiple PLC modules to communicate via bus traces while being securely mounted in the rack.

What are the key components in a backplane BOM?

The bill of materials includes the printed circuit board (PCB), edge connectors/slots for module insertion, bus traces for data transmission, termination resistors for signal integrity, and mounting holes for secure installation in machinery.

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 Machinery and Equipment 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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