Data Translation DT9800 Series, User Manual

Page: 56 / 162

Chapter 2
44
Digital I/O Features
This section describes the following features of the digital I/O
subsystem:
• Digital I/O lines, described on this page;
• Resolution, described on this page; and
• Operation modes, described on page 45 .
Digital I/O Lines
DT9800 Series function modules support eight digital input lines
(Port A, lines 0 to 7) through the DIN subsystem and eight digital
output lines (Port B, lines 0 to 7) through the DOUT subsystem.
For fast, clocked digital input operations, you can enter the digital
input lines from Port A as channel 16 in the analog input channel list;
refer to
page 16 for more information.
The DT9800 Series function modules also provide a dynamic digital
output line that you can update when an analog input channel is
read. Note that the dynamic digital output line is in addition to the
digital output lines in Port B. Refer to
page 17 for more information
on dynamic digital output operations.
On power up or module reset, no digital data is output from the
modules. All the outputs include diode protection to the isolated
ground and the is5 V.
Note: DT9800-EC Series function modules do not provide isolated
ground or is5 V power.