Controller Area Network
CANopen Pinout
[CAN Bus 9-Pin D] [CAN Bus 10-Pin
Header] [CAN Bus RJ-Style]
[CAN Bus 5-Pin Circular] [CAN Bus
7-Pin Open Style] [CAN Bus Round Style]
[CAN Bus Round Flange Style]
[Other Interface Buses]
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The Controller Area Network (CAN) specification defines the Data Link Layer, ISO 11898 defines the Physical Layer [shown here].
The CAN bus is a Balanced (differential) 2-wire interface running over
either a Shielded Twisted Pair (STP), Un-shielded Twisted Pair (UTP), or
Ribbon cable.
The pinouts on this page are associated with the CANopen
protocol on a round connector. Use the links above for other types of connector styles.
For additional information refer to the main CAN Bus page, not all implementations use a round connector.
CANbus is used as a vehicle bus, for other vehicle Buses see the Automotive Bus page.
CANbus is also used as an Industrial Field bus, additional Field Buses page.
Related topics;
Listing of Cable
Manufactures
Types of Connector Manufactures
| Pin # | Signal names | Signal Description |
| 1 | CAN_SHLD | Shield, Optional |
| 2 | CAN_V+ | Power, Optional |
| 3 | CAN_GND | Ground |
| 4 | CAN_H | Dominant High |
| 5 | CAN_L | Dominant Low |
| 9-Pin # | 8-Pin # | 7-Pin # | Signal names | Signal Description |
| 1 | 3 | 3 | CAN_H | Dominant High |
| 2 | 4 | 4 | CAN_L | Dominant Low |
| 3 | 5 | 2 | CAN_GND | Ground |
| 4 | 6 | - | - | Reserved |
| 5 | 7 | - | - | Reserved |
| 6 | 8 | - | - | Reserved |
| 7 | 1 | 1 | CAN_V+ | Power, Optional |
| 8 | 2 | - | GND | Ground |
| 9 | - | - | - | Reserved |
| - | - | 5 | DIL-1 | DIP Switch 1 connected to CAN_V+ |
| - | - | 6 | DIL-2 | DIP Switch 2 connected to CAN_V+ |
| - | - | 7 | DIL-3 | DIP Switch 3 connected to CAN_V+ |
4-pin Open Style Connectors either use pins 1-4 (Version A) or pins 2-5 (Version B). 3-pin Open Style Connectors use pins 2-4. The bus node provides the male pins of the connector.
| 12-Pin # | 9-Pin # | Signal names | Signal Description |
| 1 | - | - | Reserved |
| 2 | 7 | CAN_L | Dominant Low |
| 3 | 8 | CAN_GND | Ground |
| 4 | 9 | - | Reserved |
| 5 | - | - | Reserved |
| 6 | - | - | Reserved |
| 7 | 2 | CAN_H | Dominant High |
| 8 | - | - | Not Used |
| 9 | - | - | Reserved |
| 10 | - | GND | Ground, Optional |
| 11 | - | - | Reserved |
| 12 | 1 | CAN_V+ | Power, Optional |
| - | 3 | DIL-1 | DIP Switch 1 connected to CAN_V+ |
| 4 | DIL-2 | DIP Switch 2 connected to CAN_V+ | |
| 5 | DIL-3 | DIP Switch 3 connected to CAN_V+ | |
| 6 | DIL-4 | DIP Switch 4 connected to CAN_V+ |
Design Hint: never tie a signal line to a Reserved pin.
Running a ground line to provide a reference or shield to a reserved pin is a bad idea.
Because you never know when the function of the pin might change.
Navigation: Engineering Home > Interface Buses > Cabled Interface Standards > Vehicle Standards > CANbus Interface > CANbus Pin Outs
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