Rugged Galvanic CAN Bus Isolator for Industrial and Automotive Applications

Protect your CAN Bus network with the CAN-ISO-2500, a durable and high-performance CAN Bus isolator and repeater designed for mission-critical applications. Whether you’re working with J1939, CANopen, or proprietary CAN systems, this module provides robust 2500 V galvanic isolation to eliminate ground loops, voltage transients, and EMI noise — ensuring reliable communication in even the harshest environments.

Engineered for industrial automation, off-highway equipment, mining vehicles, and automotive OEMs, the CAN-ISO-2500 is your solution for clean, protected data transmission.

Key Features

• 2500 V Galvanic Isolation between HV and LV sides
• Supports CAN baud rates up to 1 Mbit/s (auto-detects speed)
• Wide input voltage range: 5 to 28 V DC
• Standard 120 Ohm termination resistor with optional cut traces
• IP68 waterproof, rugged enclosures
• M12 5-pin connectors, Deutsch/Amphenol or unterminated options
• Silent mode configuration for unidirectional data flow
• ESD and reverse polarity protection
• Operating temperature up to 105°C

Applications

• Mixed-voltage CAN Bus isolation in vehicles and mobile equipment
• Electrical noise protection in J1939 networks
• Segment bridging and repeater use cases
• Harsh industrial environments: mining, forestry, agriculture
• Data acquisition and test equipment requiring isolated CAN ports
• Electrical isolation and signal regeneration (repeater mode) in distributed CAN networks
• Use silent mode to isolate a device or network segment from transmitting onto the main CAN Bus while still receiving data (e.g., for monitoring or data logging).
• Segment bridging and CAN Bus topology extension
• Mixed-voltage CAN isolation in J1939, CANopen, or proprietary networks

Why Use a CAN Isolator?

Many CAN Bus systems rely on a single power domain, but mixed-supply networks introduce risks such as ground loops, signal distortion, and even hardware damage. The CAN-ISO-2500 isolates power domains while allowing full-speed communication between segments — protecting your devices and improving signal integrity.

Galvanic isolation also prevents electrical faults from spreading across your entire CAN network, a must-have for applications where reliability and uptime are critical.

Frequently Asked Questions (FAQ)

Q: Can this isolator be used in J1939 networks?

A: Yes, the CAN-ISO-2500 fully supports J1939 protocol and other standard CAN implementations.

Q: What happens if my CAN devices are on different power supplies?

A:  Voltage differences between devices can cause communication errors or damage. The CAN-ISO-2500 prevents this by isolating power domains while preserving full-speed data transfer.

Q: How do I disable termination resistors?

A: Cut the solder jumpers as outlined in the user manual. You can re-enable by soldering them again.

Q: What’s the difference between this and an optoadapter?

A: A  CAN Optoadapter (or CAN opto isolator) is typically a plug-on isolator designed for desktop or bench use. The CAN-ISO-2500 offers similar galvanic isolation, but with rugged IP-rated enclosures, wider voltage support, and field-ready connectors like M12, making it ideal for permanent installation in harsh environments.

Q: Is the device waterproof?

A: Yes — IP54 is standard, and IP68 is available for demanding environments.