Communication equipment is increasingly installed outside controlled indoor environments. Outdoor cabinets, wireless communication systems, remote monitoring equipment, network infrastructure and signal transmission devices may operate continuously while exposed to rain, humidity, dust, temperature changes and mechanical stress. In these applications, the cable connection can become one of the most vulnerable points in the system.

An IP68 connector for power and signal applications provides a protected interface between cables and communication equipment, helping engineers address water and dust ingress while maintaining a stable electrical connection. For equipment manufacturers and system integrators, however, choosing the right connector involves more than looking at an IP rating. Power requirements, signal transmission, cable diameter, installation method, mechanical loads and certification requirements all need to be considered together.

This application case explains how IP68 waterproof connectors can be integrated into communication equipment where both power and signal connections need reliable environmental protection.

Why Communication Equipment Needs Protected Cable Connections

Modern communication systems depend on multiple electrical interfaces. A single outdoor communication cabinet may contain power supplies, antennas, sensors, control units, network interfaces and monitoring modules. Each external cable connection creates an interface between the protected equipment enclosure and the surrounding environment.

When equipment is installed outdoors, this interface may be exposed to rainwater, condensation, dust and airborne contaminants. Repeated temperature changes can also create different pressure and humidity conditions around the cable entry point.

If the connection is not adequately protected, moisture or contaminants may affect the electrical interface over time. For this reason, waterproof cable connectors are often considered as part of the overall enclosure and cable-entry design rather than as an isolated component.

For communication equipment, this becomes particularly important when a connector carries both power and signal-related wiring. The connector needs to provide the required electrical connection while maintaining the environmental protection expected from the equipment design.

IP68 Connector for Power and Signal Applications

An IP68 connector can be used in communication equipment where a high level of protection against dust and water ingress is required under specified test conditions.

For power applications, the connector may be used to connect external power cables to equipment such as communication cabinets, remote monitoring units or outdoor electronic systems. For signal applications, the connection may support sensors, control interfaces or other low-voltage electrical signals depending on the connector's electrical configuration.

The key point is that power and signal connections should be evaluated according to their actual electrical requirements. A connector suitable for a signal interface should not automatically be treated as suitable for a higher-current power circuit simply because the housing has an IP68 rating.

Engineers should therefore evaluate environmental protection and electrical performance as two separate but related parts of connector selection.

Outdoor Communication Equipment and Waterproof Connector Requirements

Outdoor communication equipment presents a different set of challenges from equipment installed inside a controlled factory environment.

Typical applications may include:

• Outdoor communication cabinets
• Wireless communication equipment
• Network infrastructure
• Remote monitoring systems
• Signal acquisition equipment
• Industrial communication terminals
• Outdoor control equipment
• Communication equipment used in remote locations

In these environments, connectors may be exposed to direct rainfall, high humidity, dust and temperature fluctuations. The connector installation position also matters. A connector installed vertically, horizontally or underneath an enclosure may experience different levels of direct water exposure.

Therefore, selecting an IP68 connector should always be based on the complete installation environment rather than the rating alone.

Power Connection Considerations in Communication Systems

Power connections in communication equipment need to be evaluated according to voltage, current, conductor size and operating conditions.

Before selecting a waterproof power connector, an engineer should confirm the rated voltage and current requirements of the equipment. The number of contacts and conductor cross-section should also be considered.

For example, an outdoor communication unit may require a dedicated power connection while separate conductors are used for control or monitoring signals. In such a configuration, the connector needs to accommodate the required contact arrangement without compromising cable management or environmental sealing.

Connector selection should also take into account the expected operating temperature and the actual cable construction. Cable insulation material and outer diameter can influence both installation and sealing performance.

Rated Current Is Not Determined by IP Rating

One important engineering distinction is that IP68 defines ingress protection, not electrical load capability.

A connector with an IP68 rating can still have a different current rating from another IP68 connector. The rated current depends on factors such as contact design, conductor size, contact resistance, temperature rise and the specific connector construction.

For this reason, procurement teams should request the complete electrical specification rather than selecting a connector based only on the IP rating.

Signal Connections Require Stable Electrical Interfaces

Signal connections can have different requirements from power connections. Communication equipment may use low-voltage signals for sensors, control systems, status monitoring or equipment interfaces.

For these applications, engineers may be concerned about contact reliability, wiring configuration, connector locking and environmental stability.

Even when the transmitted signal itself requires relatively little current, an unstable physical connection can create intermittent operation. In field equipment, diagnosing an intermittent connection can also be considerably more difficult than identifying a complete open circuit.

A properly selected waterproof signal connector helps create a controlled and protected connection point between the cable assembly and the equipment.

Signal Connector Selection Should Match the Application

Not every signal application has the same requirements. Before specifying a connector, engineers should identify the number of signal contacts, voltage level, current level, cable type and installation conditions.

Where higher-frequency or data-related signals are involved, the connector should be evaluated according to the applicable electrical and transmission requirements of the system. An IP rating by itself does not define signal performance.

This distinction is especially useful for communication equipment designers: environmental protection and signal performance are related, but they are not the same specification.

How IP68 Protection Supports Outdoor Communication Equipment

IP68 is widely used where equipment requires a high level of protection against dust and water ingress.

The first digit relates to protection against solid foreign objects and dust. The second digit relates to protection against water under defined test conditions.

For an IP68 connector, the specific immersion conditions should be confirmed from the manufacturer's technical documentation. IP68 should not be interpreted as a universal guarantee against every possible outdoor condition.

For example, IP68 does not by itself define resistance to UV exposure, chemicals, continuous cable movement, mechanical impact or extreme temperature cycling.

In a communication equipment project, these environmental factors should therefore be evaluated separately.

Cable Diameter and Sealing Performance

One of the most practical factors in selecting a waterproof cable connector is cable outer diameter.

Many waterproof connector designs use a sealing structure around the cable. If the actual cable diameter is outside the specified range, the intended sealing performance may not be achieved.

Before approving a connector for production, engineers should confirm:

• Cable outer diameter
• Cable jacket material
• Number of conductors
• Conductor cross-section
• Cable flexibility
• Connector sealing range
• Connector installation method

This is particularly important when an OEM changes cable suppliers. A replacement cable may have the same electrical specification but a different outer diameter or jacket construction.

For production equipment, connector and cable compatibility should therefore be verified as a complete assembly.

Mechanical Stress in Communication Equipment

Environmental sealing is only one part of connector reliability. Mechanical stress should also be considered during system design.

Outdoor communication equipment can experience vibration from nearby machinery, wind-induced cable movement, maintenance operations or repeated cable handling.

If a cable is unsupported, mechanical force can be transferred directly to the connector. Over time, this may place unnecessary stress on the cable entry area and connection interface.

Proper cable routing and strain relief can help reduce these loads.

Strain Relief Matters in Field Installations

A waterproof connector should not be expected to carry mechanical loads that should be managed by the cable support system.

For communication equipment installed on poles, cabinets or other outdoor structures, the cable should be routed and supported appropriately. The connector should provide the intended electrical and environmental interface while the installation structure manages excessive cable movement.

This approach is particularly relevant when the equipment is expected to remain in service for many years.

Connector Locking for Reliable Field Connections

A secure locking mechanism helps maintain the intended mating condition during equipment operation.

For outdoor communication equipment, connectors may need to remain connected for extended periods while being exposed to vibration, temperature changes and cable movement.

The locking structure should therefore be evaluated according to the equipment's installation environment and maintenance requirements.

For systems requiring periodic servicing, the connector should also be practical for technicians to install and disconnect without unnecessary tools or complicated procedures.

A good connector design should balance connection security with serviceability.

Panel Mount and Cable-to-Cable Configurations

Communication equipment can require different connector configurations depending on the enclosure structure.

Panel Mount Waterproof Connection

A panel mount connector can provide a fixed electrical interface on an equipment enclosure. This configuration is useful when cables need to connect directly to a communication cabinet or electronic housing.

When specifying a panel mount IP68 connector, engineers should check the mounting hole, panel thickness, rear clearance and cable routing space in addition to the connector's electrical and environmental specifications.

Cable-to-Cable Waterproof Connection

A cable-to-cable waterproof connector allows two cable assemblies to be joined through a detachable connection.

This configuration can be useful for external communication wiring, field installation and equipment systems where cables may need to be replaced or extended.

The cable diameter range, contact configuration and locking structure should be verified before production use.

Material and Environmental Considerations

The materials used in a waterproof connector should be considered according to the actual application environment.

Outdoor communication equipment may be exposed to sunlight, rain, humidity, dust and temperature changes. Industrial equipment may additionally encounter oils, cleaning agents or other substances.

An IP68 rating does not automatically mean that a connector is resistant to every chemical or environmental condition. If a specific application involves chemical exposure or continuous outdoor UV exposure, the appropriate material compatibility should be evaluated separately.

For OEM projects, providing the connector manufacturer with the actual operating environment can help identify potential material or installation concerns at an early stage.

TUV Certification and Product Qualification

Certification and test documentation can be important during the supplier qualification process for communication equipment manufacturers and system integrators.

Depending on project requirements, buyers may request IP test documentation, electrical test information, material specifications and applicable certification records.

For E-Weichat products where TUV-related certification or testing documentation applies, buyers should confirm the relevant documentation for the specific connector series and model being evaluated.

This is a more practical approach than treating certification as a general statement across an entire product range. The exact model, configuration and applicable test conditions should always be checked against the project requirements.

What to Include in an RFQ for an IP68 Connector

A detailed technical RFQ can help communication equipment manufacturers receive a more accurate connector recommendation.

Instead of simply asking for an “IP68 waterproof connector,” provide the following information:

• Application and equipment type
• Indoor or outdoor installation
• Required IP rating
• Power or signal application
• Rated voltage
• Rated current
• Number of contacts
• Cable outer diameter
• Cable construction
• Connector mounting method
• Operating temperature
• Vibration or cable movement conditions
• Required certifications
• Estimated order quantity

This information allows the connector supplier to evaluate the application rather than simply matching a product by appearance or connector size.

Common Connector Selection Problems in Communication Projects

Choosing an IP Rating Without Checking the Test Conditions

An IP68 rating is based on defined test conditions. Engineers should check the manufacturer's documentation to understand the applicable test parameters rather than assuming that every IP68 product has identical water-resistance conditions.

Using the Same Connector for Power and Signal Without Electrical Verification

Power and signal circuits can have different electrical requirements. Voltage, current, contact arrangement and signal characteristics should be reviewed before selecting a common connector configuration.

Ignoring Cable Compatibility

The connector sealing system must be compatible with the actual cable outer diameter. Cable changes during production should trigger a compatibility review.

Assuming IP68 Means Complete Environmental Protection

IP68 addresses ingress protection under specified conditions. Other factors such as UV exposure, chemicals, vibration and temperature cycling require separate consideration.

E-Weichat IP68 Connector Solutions for Communication Equipment

E-Weichat provides waterproof connector solutions for industrial equipment, communication systems, outdoor applications, energy equipment and other demanding environments.

Selected E-Weichat waterproof connector series are specified with IP68 protection and can be used for applications requiring protected cable interfaces. Depending on the connector configuration, products can support different cable connection and equipment integration requirements.

For communication equipment projects, the selection process can start with the actual application requirements: whether the connector is used for power or signal, the cable specification, the installation environment and the required mounting configuration.

For OEM and system integration projects, this application-based approach can help reduce unnecessary product changes during engineering validation and production.

Engineering Checklist for Power and Signal Connector Selection

Before finalizing an IP68 connector for communication equipment, the engineering team can review the following checklist:

• Is the required IP protection level clearly defined?
• Does the connector match the actual cable outer diameter?
• Are voltage and current requirements within the connector specification?
• Is the contact configuration suitable for the power or signal circuit?
• Is the locking method appropriate for the installation environment?
• Has cable movement and mechanical stress been considered?
• Is the connector mounting configuration compatible with the equipment enclosure?
• Are operating temperature and environmental conditions defined?
• Are required test reports or certifications available for the specific model?
• Has the complete connector-and-cable assembly been evaluated?

This checklist is useful not only for procurement but also for engineering validation. Defining these parameters early can make supplier communication more efficient and reduce the risk of selecting a connector that meets one requirement while failing another.

Conclusion

For outdoor communication equipment, the connector is a small component with an important role in the overall system. A reliable connection needs to address environmental protection, electrical performance, cable compatibility and mechanical installation at the same time.

An IP68 connector for power and signal applications can provide a practical solution where communication equipment requires protected cable interfaces in outdoor or demanding environments. However, IP68 should be treated as one part of the specification rather than the only selection criterion.

For engineers and procurement teams, the most effective approach is to define the complete application first and then match the connector to the cable, electrical requirements, mounting configuration and environmental conditions.

With nearly 20 years of R&D experience, E-Weichat develops waterproof connector solutions for OEMs, equipment manufacturers and system integrators. Selected products are available with IP68 protection, while applicable product certification and test documentation can be reviewed according to the specific series and model.

Frequently Asked Questions

What is an IP68 connector used for in communication equipment?

An IP68 connector is used to provide a protected cable connection where equipment may be exposed to dust and water. In communication equipment, it can be used for suitable power, signal, control or other electrical interfaces depending on the connector's electrical specifications.

Can one IP68 connector be used for both power and signal?

It depends on the connector's rated voltage, current, contact configuration and the requirements of the specific circuit. IP68 defines environmental protection and does not determine electrical performance. The complete connector specification should be checked before using one configuration for both power and signal.

What information should I provide when sourcing an IP68 connector?

Provide the application, required IP rating, power or signal function, voltage, current, contact count, cable outer diameter, mounting method, operating temperature, mechanical conditions and certification requirements. This information allows the supplier to recommend a connector configuration based on the actual equipment requirements.