Apparatus for live bus insertion of add-on devices

Electricity: electrical systems and devices – Safety and protection of systems and devices – With specific current responsive fault sensor

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395281, 361791, 439374, 3649294, 36492793, 364DIG2, G06F 1300, H01R 1302, H01R 13642

Patent

active

055308104

ABSTRACT:
An apparatus for allowing an add-on device to be inserted onto an active bus and configurable within one bus cycle is provided. The apparatus includes passive circuits used with a sequential multi-length pin arrangement on an I/O module. The apparatus also decouples the source of power to the I/O module from other devices on the bus which limits the disruption of power during the insertion. The I/O module limits current drawn from a backplane containing the bus which may disrupt signals during the insertion of the add-on device. And finally, the I/O module also limits bus signal disruption during insertion by precharging signal pins, increasing the resistance between the add-on I/O module pins and the backplane and adding capacitance to the bus.

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