10 Best 3 Port Isolation Module in 2026

The module box handles DRL and non-DRL setups with a soft start feature. It isolates truck headlights from plow lights to prevent electrical interference.

While it is priced higher than generic options, its reliability and genuine part status justify the cost for professionals.

Buy this if you need a trusted solution for your Western snowplow on a 2008 or newer Ford truck.

Soft Start Feature

Designed for non-DRL lights that use the soft start feature to protect bulbs and electronics.

Model Compatibility

Designed For Use On 2008 and newer Ford Super Duty trucks for seamless integration.

The module ensures proper isolation to prevent electrical issues when switching lights. It is designed for use on 2008 and newer trucks.

Since there is no specific rating data available, it is best for those who know they need this exact part number.

Choose this if you are replacing a failed module in your existing truck snowplow system.

Direct OEM Match

This item is the 29070-1 three port isolation module designed to work with your existing system.

Protection circuits guard against overcurrent, surges, and gas discharge. A DIP switch allows customization of the 120 ohm termination resistor for better signal stability.

It supports baud rates up to 1Mbps, though actual performance depends on connected devices. It is ideal for expanding communication lines without interference.

Buy this for industrial automation systems needing robust RS485 expansion and protection against electrical disturbances.

Stable Connections

The hub utilizes a 3.5mm terminal connection, compatible with OK wires and flying wires.

Protection Circuits

Featuring overcurrent protection, surge protection, and gas discharge protection for thunder strikes.

Each port has independent overcurrent and surge protection. Multi-channel LEDs display power and TX/RX status for easy monitoring. It supports up to 1Mbps baud rate with a DIP switch for termination.

While there are no user ratings, its industrial specs are robust. It is designed for straightforward setup in control cabinets.

Choose this for professional industrial automation setups needing reliable DIN rail installation and port monitoring.

Dual Isolation

Built-in optocoupler and power isolation completely blocks ground potential difference, static electricity and surges.

Individual Port Protection

Each slave port is equipped with independent overcurrent, surge, and gas discharge tube protection.

It is bus powered with an integrated isolated supply delivering up to 1W. This simplifies setup while maintaining isolated power delivery to connected devices like keyboards or USB to serial adapters.

With a perfect 5.0 rating, users appreciate its reliability and driver-free operation. It is an excellent transparent isolator for testing and protection tasks.

Buy this to protect your computer USB ports from voltage spikes and ground loop interference.

ADI iCoupler Digital Isolation

Uses ADI iCoupler isolation technology; provides up to 2500 V data isolation and 1500 V power isolation.

USB Bus Powered

Powered directly from the host USB port; integrated B0505S isolated power module delivers up to 1 W output.

It controls up to 512 channels and fits DIN rail mounting solutions. It is designed for lighting control setups needing reliable signal distribution.

With a 4.8 rating, it is trusted by users for its robust isolation and clear connectivity options. It is a premium choice for professional lighting.

Select this for DMX lighting control systems requiring reliable signal splitting and electrical protection.

Four DMX Outputs

2 x 3-Pin + 2 x 5-Pin outputs for greater flexibility.

Optically Isolated

All outputs are optically isolated – protects against up to 1000V of stray voltage.

It supports various transfer types like bulk and interrupt. The product is powered from the computer host USB port and supports USB 2.0.

With a 3.5 rating, it is a budget-friendly option for those needing multiple isolators. It is best for audio applications where speed requirements are moderate.

Consider this if you need two isolators for audio or serial connections on a budget.

Isolation Voltage

Isolation voltage of power module: 1500V.

Transmission Speed

Transmission speed: Support USB full speed 12Mbps, not pure high-speed devices.

The module provides three port isolation for proper system separation. It is essential for maintaining the electrical safety and performance of your plow.

With minimal description details, it is best for those who know exactly what part they need. The high rating suggests reliability.

Buy this if you are looking for a trusted replacement module for your specific snowplow model.

Genuine Part

R&L Supply Genuine Fisher/Western/Snow-ex Snowplow 3 Port Isolation Module 29070-1.

It serves as an isolation module to keep lighting circuits safe. It is a genuine Western snowplow part ensuring compatibility.

While there are no specific user ratings, its designation as a genuine part suggests reliability for those needing a full harness kit.

Choose this if you need a complete light system solution for your compatible Western snowplow.

Plug-in Kit

Light System Harness Kit Plug-in for 2B/2D/HB2.

It isolates truck headlights from plow lights to prevent electrical interference and handles high beam, low beam, turn signal, and park light circuits.

While there are no user ratings, its design specifications indicate it is built for robust isolation needs. It is ideal for complex lighting setups.

Buy this if you are using a SnowDogg plow and need reliable light switching isolation.

DRL Compatibility

Compatible with DRL and non-DRL vehicle lighting systems.

Automatic Switching

Allows automatic switching between vehicle and plow lighting.