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.
Effects of Capacitive Bus Loading on J1850 Vehicle Networks
Sae Technical Papers
Multiplexing Conference ; 1994
1994-09-01
Conference paper
English
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