How to use "Contact Switch" for trigger without pull-uping on M-series PCI board

[cpp_programer]

We want to use contact switch for trigger on M-series PCI board. but PFI0 on BNC-2110 is not pullup to 5V, so we need pull-uping for triggering with contact switch. Is there any solutions without pull-upping or which just one jummper line need on the BNC-2110 ?
Thank you.

[WM_John_Weeks]

According to the spec sheet, the M-series PFI pins have a pull-down resistor on the outputs. That would imply that you could connect your switch between +5V and the PFI pin.

Be aware that flipping a switch can involve making and breaking the connection many times in short period. You may want to look into de-bouncing the input if edges are important to you. If just the state of the input is important, you might not need de-bouncing.