Serial Port Connector: Voltage Rating Up to 250V AC/DC

Component Specifications

Definition

A serial port connector is a standardized physical interface used in industrial and electronic systems to establish serial communication links between devices such as computers, controllers, sensors, and machinery. It facilitates asynchronous data transmission where bits are sent sequentially over a single wire or pair, following protocols like RS-232, RS-422, or RS-485. Common in legacy and specialized industrial applications, it ensures reliable point-to-point or multi-point connections in environments with electromagnetic interference, often featuring robust housings, locking mechanisms, and shielding for durability.

Working Principle

The serial port connector operates on serial communication principles, where data is transmitted as a sequential stream of bits over a single communication line or differential pair. It uses voltage levels (e.g., ±3 to ±15V for RS-232) or current loops to represent binary states, with timing controlled by baud rates. Connectors interface with transceiver chips that convert parallel data from devices into serial signals, enabling long-distance communication with error checking through protocols like parity bits, making it suitable for industrial control systems.

Materials

Housing: Thermoplastic (e.g., PBT, nylon) or metal (e.g., zinc alloy) for durability; Contacts: Gold-plated copper alloy (e.g., phosphor bronze) for corrosion resistance and low electrical resistance; Insulation: High-temperature plastics; Shielding: Metal shells or coatings for EMI/RFI protection; Seals: Silicone or rubber gaskets for IP-rated environmental sealing.

Technical Parameters

Parameter	Typical range	Notes & selection driver
IP Rating	IP67 (optional)
Pin Count	9, 25, 8
Shielding	Yes, for EMI protection
Mounting Type	Panel mount, cable mount, PCB mount
Connector Type	DB9, DB25, RJ45, Terminal Block
Current Rating	1-5A per contact
Interface Type	RS-232, RS-422, RS-485
Voltage Rating	Up to 250V AC/DC
Operating Temperature	-40°C to +85°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 2110, DIN 41652

Parent Products

This component is used in the following industrial products

Serial Interface Module

A hardware component that provides serial communication interfaces for connecting peripheral devices to a Device Server.

View Product Details

Engineering Analysis

Risks & Mitigation

Electrical interference disrupting data transmission
Mechanical failure from vibration or impact
Corrosion in humid environments
Incompatibility with newer digital interfaces

FMEA Triads

Trigger: Poor shielding or grounding
Failure: Electromagnetic interference (EMI) causes data corruption or loss
Mitigation: Use shielded cables and connectors, ensure proper grounding, and follow installation guidelines for noise reduction.

Trigger: Exposure to moisture or chemicals
Failure: Contact corrosion leads to increased resistance or open circuits
Mitigation: Select connectors with appropriate IP ratings (e.g., IP67), use protective seals, and apply conformal coatings in harsh environments.

Trigger: Mechanical stress from frequent use
Failure: Pin damage or connector housing cracks, resulting in intermittent connections
Mitigation: Choose robust materials (e.g., metal housings), implement strain relief, and train personnel on proper handling and mating procedures.

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Contact resistance: <20mΩ; Insulation resistance: >100MΩ at 500V DC; Voltage withstand: 1500V AC for 1 minute

Test Method

Testing per IEC 60512 for electrical performance, mechanical durability (e.g., mating cycles), and environmental resistance (e.g., salt spray, temperature cycling).

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Serial Port Connector

Manufacturer profiles associated with Serial Port Connector.

Sourcing Serial Port Connector from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

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

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

Related Components

Dielectric Layer

Insulating layer in surface mount capacitors that stores electrical energy through polarization.

Optical Window

Transparent optical component for light transmission in polycarbonate lens housings

PCB Substrate

PCB substrate is the foundational insulating layer that provides mechanical support and electrical connectivity for electronic components in high-speed memory modules.

Edge Connector

Edge connector is a printed circuit board (PCB) connector that mates with the edge of another PCB, commonly used in high-speed memory modules for reliable electrical connections.

Frequently Asked Questions

What is the difference between RS-232, RS-422, and RS-485 serial connectors?

RS-232 is for short-distance, point-to-point communication with single-ended signaling; RS-422 supports longer distances and differential signaling for noise immunity; RS-485 allows multi-point communication over longer distances with higher data rates, commonly used in industrial networks.

How do I choose the right serial port connector for an industrial machine?

Consider factors like communication protocol (e.g., RS-232 vs. RS-485), distance, data rate, environmental conditions (e.g., IP rating for dust/water resistance), connector type (e.g., DB9 for legacy systems), and compatibility with existing equipment and standards.

What are common failure modes for serial port connectors in industrial settings?

Common failures include contact corrosion from moisture, mechanical wear from frequent mating/unmating, EMI interference due to poor shielding, and pin bending or breakage from improper handling, leading to communication errors or disconnections.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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 Port Connector