HD491 Smart Encoder
Copyright © 2000-2014 EEG Enterprises, Inc. 38
All Rights Reserved.
GPIO Connector Pin Numbering
The GPIO pins are located on the two 16-pin connectors on the rear panel
of the HD491. The top connector is used for the GPI switches and the
bottom is used for the GPO switches, with the pins numbered in the
following manner on each connector:
GPI Pin Assignments
The GPIs use the upper 16-pin connector, which mates to a female IDC-
16 connector. The pin assignments are given in the table below:
15
13
11
9
7
5
3
1
16
14
12
10
8
6
4
2
Pin(s)
Input
1,3,5,7,9,11,13,15
Ground
2
GPI-A
4
GPI-B
6
GPI-C
8
GPI-D
10
GPI-E
12
GPI-F
14
GPI-G
16
GPI-H
