
Introduction 1
1 - 2
Every
I/O module is tested while its operating environment temperature is cycled
over the specified operating range of 0° C to 60° C for a period of 24 hours. A
computer record is maintained for
every
analog I/O module.
Throughput:
System response or throughput for the I/O PLEXER can be calculated using
appendix B.
I/O Signal Compatibility
I/O PLEXERs use duTec I/O modules to match signal requirements exactly.
With a direct interface to sensors, no external signal conditioning is required.
Furthermore, all duTec modules feature total electrical isolation, both module-to-
logic, and module-to-module.
Analog modules are available to measure:
Millivolts DC to hundreds of volts AC
Milliamps DC to amps AC
Frequency to tens of KHz
Temperature with all popular thermocouples and resistive temperature
devices
A full range of industry standard digital modules is available for AC, DC and dry
contact inputs and outputs to hundreds of volts.
Thermocouple modules provide a cold reference junction compensation. I/O
PLEXER instructions provide linearized thermocouple and RTD sensor data.
Engineering unit conversions are handled at the Host level.
Built-in Diagnostics:
On power-up, the unit self-tests for system faults and reports via a sequential
display. Should hardware or firmware fail, an on board hardware watchdog
provides safe shutdown by turning off all outputs. Normally ON modules are
available for those loads that must remain ON.
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