National Instruments 9401 User Manual

module sets all the DIO channels to high impedance for
approximately 280 ms.
When the channels are in an overcurrent state, the NI 9401 can
accept new line direction configuration and output state data but
cannot pass valid input data to the software.
16 | ni.com | NI 9401 Getting Started Guide

National Instruments 9401 Specifications

General

Brand	National Instruments
Model	9401
Category	I/O Systems
Language	English