Installation Manual

14
Digital (TTL) Input/Output Setup
The MP9320 is equipped with a digital I/O port that provides four input signals and
four output signals. Refer to the SAMSys Forth Programming Language Reference
Guide for programming information.
Digital I/O Overview
As shown in Figure6, the inputs are optically isolated. The outputs are open collector.
Figure 6–Digital Input and Output Port Configuration
Signal Name Pin No. Description
Input 1 a TTL input - optically isolated
Input 2 b TTL input - optically isolated
Input 3 U TTL input - optically isolated
Input 4 D TTL input - optically isolated
Digital input common N input common
Output 1 Z TTL output - open collector
Output 2 c TTL output - open collector
Output 3 V TTL output - open collector
Output 4 E TTL output - open collector
Digital output common M output common