Manual PCIe-DIO-24HS PCI Express Digital I/O Card
10
Quick-Disconnect Grounding Tab
A quick disconnect grounding tab exists on the mounting bracket for the
–S01 card version. It
is connected to the board ground plane, which connects to the PC power supply return /
chassis ground.
VCCIO Resettable Fused Output
There is a 0.5A resettable fuse. It connects to pin 49 of the I/O connector and is used to
protect the card and PC power supply when used to power external module racks, relay
boards, or for general purposes. If an over-current persists on a circuit protected by the
resettable fuse, it will open interrupting power to the circuit. The amount of time it takes the
fuse to act depends on the amount of over-current and other conditions such as ambient
temperature, humidity, etc. The fuse will remain open until the bi-metal elements cool
sufficiently, at which time the circuit will be restored.
