Controller Area Network

CAN bus Cables and Connectors


Cable Length, Wires and Terminators

The cable length depend on the selected band rate on the bus: how higher the speed, how shorter the bus.

 

Bus speed

Cable type

Cable resistance/m

Terminator

Bus Length

50 kbit/s at 1000 m

0.75 ...0.8 mm2
AWG18

70 mOhm

150 ... 300 Ohm

600 .. 1000 m

100 kbit/s at 500 m

0.5 ... 0.6 mm2
AWG20

< 60 mOhm

150 ... 300 Ohm

300 ... 600 m

500 kbit/s at 100 m

0.34 ...0.6 mm2
AWG22, AWG20

< 40 mOhm

127 Ohm

40 ... 300 m

1000 kbit/s at 40 m

0.25 ...0.34 mm2
AWG23, AWG22

< 26 mOhm

124 Ohm

0 ... 40 m

In the devices of CD Systems the slope control of the bus driver is active for baud rates 10 Kb, 20 kb and 50 kb.


RJ10 connector  Cable part

Used by: CANopen

Type: RJ10

 

Pin

Description

Colour

1

V- Black

2

CAN_L Red

3

CAN_H Green

4

V+ Yellow

Cable specification:

The 4- wire telephone cable comes with a resistance of 142 Ohm / 1000 mtr.
The cable capacity is aprox. 150 pF / mtr.  

See also the 9-pole sub D  to  dual RJ10 connector 6148


RJ11 and RJ12 connector  Cable part

Used by: CANopen

Type: RJ11 ,RJ12

 

Pin

Description

Colour

1

nc -

2

V- Black

3

CAN_L Red
4 CAN_H Green
5 V+ Yellow
6 nc -

Cable specification:

The 4- wire telephone cable comes with a resistance of 142 Ohm / 1000 mtr.
The cable capacity is aprox. 150 pF / mtr.  


9-pole sub-D connectors Female cable part

Used by: CANopen 

Type: 9-pole sub-D

 

Pin

Description

Description

 

1

  reserved

2

CAN_L

CANbus L

3

V-

CAN gnd

4

   reserved

5

(CAN_shld)

Optional CAN shield

6

(gnd)

Optional CAN gnd

7

CAN_H

CANbus H

8

   reserved error line

9

V+

CAN supply

Connectors on devices have male contacts.

See also the 9-pole sub D  to  dual RJ10 connector 6148
for a perfect, fast and low cost CAN wiring system.


Hand wired connectors Female cable part

Used by: DeviceNet

Type: Screw type Weidmuller

 

Pin

Description

Color

 

1

V- Black

2

CAN_L Blue

3

Drain Bare

4

CAN_H White

5

V+ Red

Connectors on devices have male contacts.


Sealed mini style connectors

Used by: DeviceNet

Type: ANSI/B93.55M-1981

 

Pin

Description

Color

 

1

Drain Bare

2

V+ Red

3

V- Black

4

CAN_H White

5

CAN_L Blue

Connectors on devices have male contacts.


Sealed Micro style connectors

Used by: DeviceNet

Type: Lumberg style RKT 5-56/xm or equivalent

 

Pin

Description

Color

1

Drain Bare

2

V+ Red

3

V- Black

4

CAN_H White

5

CAN_L Blue

Connectors on devices have male contacts.


Micro style connectors

Used by: SDS

Type: Female round

 

Pin

Description

Color

 

1

V+ Brown

2

V- Blue

3

CAN_L White

4

CAN_H Black

 


Sealed mini style connectors

Used by: SDS

Type: Female round

 

Pin

Description

Color

 

1

Shield Bare

2

V+ Brown

3

V- Blue

4

CAN_H Black

5

CAN_L White