Overview

The EX1266-7416 has 16 true differential channels of analog comparator input that can be selected to generate an external signal, or provide an interrupt to the EX1200 system when the input falls outside the software programmed bounds. The EX1200-7416 is an ideal device in go/no-go testing where a device fails if the voltage outputs exceed a threshold or window. It is also useful in control applications if a device or test needs to be shut down or if a voltage level falls out of tolerance. Using an analog comparator/interrupter in certain applications, as opposed to a traditional scanning DMM approach, considerably improves the overall response time of the system. It provides the ability to “constantly monitor” signals of interest for fault conditions.

The inputs are independently software programmable, permitting the user to vary input thresholds per channel. Each input signal is also digitally debounced for a programmed time ranging from 1 µs to 500 ms, preventing input signal noise from causing undesired interrupts. The threshold polarity can be programmed to detect either a rising or falling edge or can be masked to prevent unused channels from causing interrupts.