General-Purpose Digital I/O - National Instruments UMI-7774 User Manual

General-Purpose Digital I/O

© National Instruments Corporation
Chapter 3
The UMI-7774/7772 routes 16 of the general-purpose digital I/O lines
of the National Instruments motion controller to a single 25-pin D-SUB
connector. All 16 digital I/O signals are optically isolated on the
UMI-7774/7772. These signals are configurable as inputs and/or outputs
on the National Instruments motion controller. Use MAX or NI-Motion
software to configure the bits on port 1 as inputs and the bits on port 2
as outputs.
The 8 bits from the first port on the motion controller (Port 1: bits 0–7)
become sinking inputs on the UMI-7774/7772, and the 8 bits from the
second port of the motion controller (Port 2: bits 0–7) become sourcing
outputs on the UMI-7774/7772. Refer to Figure 3-17 for the pin locations
of the Digital I/O connector and to Table 3-9 for the corresponding signals
for each pin. Refer to Figures 3-16 through 3-20 for information on how to
wire the digital inputs and outputs on the UMI-7774/7772.
Table 3-9. Digital I/O Connector Pin Assignment
Pin
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Connecting the UMI-7774/7772 to Drives and Other Devices
Signal
Digital Input 0
Digital Input 2
Digital Input 4
Digital Input 6
Iso Power (Output)
Iso Power (Output)
NC
Digital Output 0
Digital Output 2
Digital Output 4
Digital Output 6
Iso Power (Output)
Iso Power (Output)
Digital Input 1
Digital Input 3
3-27 National Instruments UMI-7774/7772 User Manual
Optically Isolated
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes