Information Technology Reference
In-Depth Information
Typical maximum lengths are:
•
500 kbps (100 m).
•
250 kbps (200 m).
•
125 kbps (500 m).
•
10 kbps (6 km).
There are no standard CAN connectors, typical types, as illustrated in Figure 21.2, are:
•
9-pole DSUB. The main connections are CAN_L (CAN_L bus line), CAN_GND (CAN
ground), CAN_H (CAN_H bus line) and CAN_V+ (power, between +7 V and 13 V,
100 mA). Modules have a male connector (plug) and cables have a female connector
(socket). Pins 3 and 6 are connected internally.
•
5-pole Mini-C (DeviceNet and SDS). Power supply is 24 V and modules have male con-
nectors.
•
6-pole Deutch DT04-6P connector (proposed by CANHUG for hydraulic systems). It
uses a male connector on the module and has six pins. The main connections are
CAN_H (pin 2), power (pin 5), GND (pin 1) and CAN_L (pin 6).
1 Drain
2 V+ (RED)
3 V- (BLACK)
4 CAN_H (WHITE)
5 CAN_L (BLUE)
1
2
3
4
5
3
2
4
6789
1
5
9-pole DSUB
5-pole Mini-C
Figure 21.2
Typical CAN connectors
21.3 CAN bus basics
Many of the basics of the CAN bus were outlined in Section 21.1.
