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Effects of Capacitive Bus Loading on J1850 Vehicle Networks
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Sector:
Event:
Multiplexing Conference
Language:
English
Abstract
Capacitive overloading of SAE J1850 vehicle communications networks will cause a change in the time constant for a particular network causing it to fall out of specification. Addition of transient voltage protection devices to communications nodes increases a node's capacitive load on a system causing the overall network time constant to change. Other capacitive components commonly encountered in a communications network will also change the network's time constant, causing it to fail or to behave erratically. Component selection plays an important role in maintaining the correct capacitive loading on a SAE J1850 network in order to adhere to the physical layer characteristics of both PWM and VPW protocols.
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Authors
Topic
Citation
Alfaro, E., "Effects of Capacitive Bus Loading on J1850 Vehicle Networks," SAE Technical Paper 941652, 1994, https://doi.org/10.4271/941652.Also In
References
- Society of Automotive Engineers “SAE J2201 Recommended Practice - Universal Interface For OBD II Scan Tool,” November 1992 A4 A14
- Society of Automotive Engineers “SAE Standard J1850 - Class B Data Communication Network Interface,” March 9 1994 18
- Cherniak S. “A Review of Transients and Their Means of Suppression,” Motorola Semiconductor
- Harris Semiconductor “Transient Voltage Protection Devices,” 1990 9 52 9 53
- Motorola Semiconductor “TVS/Zener Device Data,” First 1991 6-4-17 6-4-22