Digital Input Channels ("Di" Connection); Assemblies Of The Digital Input Channels; Overview; Fig. 5-1 Digital Input Channels - ETAS ES930.1 User Manual

ETAS
5

Digital Input Channels ("DI" Connection)

The ES930.1 provides four digital input channels at the "DI" connection for dif-
ferent measuring functions (status, counter, timer).
5.1

Assemblies of the Digital Input Channels

5.1.1

Overview

Digital Input Channel n
Fig. 5-1
The digital input channels "DI 1" to "DI 4" of the ES930.1 feature an identical
design and consist of an input stage with signal acquisition and signal process-
ing. The input stage of each channel (see in Fig. 5-1 on page 31) consists of the
following assemblies :
• Schmitt trigger (TTL-compatible)
• Glitch filter
• Capture unit
• Counter unit
• Timeout detection
• Event raster source
• Counter overflow detection
The digital input channels are dimensioned for TTL-compatible input voltages.
The minimum pulse width is restricted to 120 ns. This restriction avoids acquir-
ing interference pulses at the measuring channels.
The functionality of all digital input channels can be configured separately.
ES930.1 - User Guide
Glitch Filter
Digital Input Channels
Digital Input Channels ("DI" Connection)
Counter Unit
Capture Unit
Counter
Overflow
Detection
Timeout
Detection
Event Raster
Source
Measure-
ment
Unit
Diagnosis
Unit
Event Unit
31