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The CAN-11 CAN Bus DIN Rail Isolated Repeater is a robust, industrial-grade device designed to enhance the reliability and scalability of Controller Area Network (CAN) systems. It offers 1.5 kV electrical isolation using magnetic coupling technology, effectively protecting network components from electrical surges and ground loop interference. With support for CAN 2.0A/B standards and optional compatibility with the CAN-FD protocol, the repeater ensures seamless integration into various applications, including automotive electronics, industrial automation, and intelligent instrumentation. Its plug-and-play design, coupled with a slim modular form factor and detachable terminals, facilitates easy installation on standard 35mm DIN rails, making it suitable for diverse network topologies such as linear, star, and tree structures.

The CAN-11 features adaptive baud rate support ranging from 10 Kbps to 1 Mbps (up to 5 Mbps for CAN-FD), enabling it to accommodate a wide range of network speeds. Its built-in bus arbitration logic and dominant timeout (DTO) function enhance network stability by isolating faulty segments, ensuring uninterrupted communication among healthy nodes. The device's loopback time is as low as 110 nanoseconds, and it can support up to 110 nodes on the bus. Operating within a voltage range of 9 to 28 VDC and a temperature range of -25°C to +70°C, the CAN-11 is engineered for durability in demanding environments. Additionally, LED indicators provide real-time status updates for power and data traffic, aiding in efficient network monitoring and diagnostics.

See also our post: CAN Bus Repeaters: Overview and Technical Considerations...

Features

• Industrial grade CAN bus isolated repeater, 100Mbps high speed isolation
• Standard 35mm DIN rail mounting, 9-28VDC wide voltage supply
• Supports CAN2.0A/B Standard (optional support for the latest CAN-FD standard)
• Slim modular design with detachable terminals
• Magnetic coupling isolation technology, 1.5KV electrical isolation, interface surge protection
• Power supply, CAN Bus pre-stage and rear-end three-terminal isolation
• Built-in bus arbitration logic, bus data LED indication;
• 10K-1Mbps baud rate adaptive, loopback time as low as 110nS
• 110 node bus load capacity

Failure isolation function:
CAN-11 provides fail-isolation. When one end of the bus data continues to be "dominant", the other side of the transceiver will trigger the dominant timeout (DTO) function, thereby isolating the failed side bus, ensuring that the typical side bus node remains in Normal communication.

Technical Characteristics

Item                          Min           Typical          Max
Input Voltage                 9 VDC         24 VDC           28 VDC
Input Current @24VDC                        20 mA
Operating Temperature         -25C          +25C             +70C
Storage Temperature           -25C          +25C             +85C
Humidity                                    95% (non-condensing)
CAN Bus Isolation Voltage                   1500 VDC
Surge TVS                                   600 W/line
Protection Voltage                          30 V
Overcurrent Protection                      200 mA
Loopback Time                               110 nsec
Baud Rate                     10 Kbps                        1 Mbps (CAN-FD 5 Mbps)
Dominant Timeout (T_DTO)      1.2 msec                       3.8 msec
Dimensions                                  118 x 100 x 17.5 mm
                                            4.6" x 3.94" x 0.7"
Installation                                35 mm DIN Rail

Galvanic Isolation

High noise levels on a CAN bus network have the potential to destroy CAN bus transceivers. This noise originates mainly from two sources, ground loops and electrical line surges. Protecting a network against this destructive energy requires the galvanic isolation of the CAN bus system from other local node circuitry.

For more information, see: Galvanically Isolated CAN Bus Transceivers Protect Networks Against Destructive Energy...

Dimensions

Connections

 PIN          Connection       Description

1            V0               Power Supply -
2            V+               Power Supply +
3            -                NC
4            C1L              CAN_L 1
5            R1               Termination Resistor (Connect to C1L to activate)
6            C1H              CAN_H 1
7            C2L              CAN_L 2
8            R2               Termination Resistor (Connect to C2L to activate)
9            C2H              CAN_H 2

LED Indicators

Name         Status           Description
Power        Green            Power On
D1           Green            CAN1 Data Traffic
D2           Green            CAN2 Data Traffic

Supported Network Architectures

Branch Extension

Linear Topology

Star Topology

Tree Topology

CAN Bus Termination Resistor

Activate termination resistors on both physical ends of the CAN Bus networks:

For more information, see: Controller Area Network (CAN Bus) - Physical Layer And Bus Topology...

Usage of the built-in termination resistor:

Block Diagram