DESCRIPTION

The Horner APG Thermocouple Input Modules allow thermocouple temperature sensors to be directly

connected to the PLC without external signal processing (transducers, transmitters, etc.).  All analog and

digital processing of the thermocouple signal is performed on the module.  These modules have a

resolution of 0.5°C, and temperature values may be reported to the PLC %AI I/O table in 0.5°C or 0.5°F

increments.  There are four standard resolution models available, with four input channels

(HE693THM409/HE693THM449), and with eight input channels (HE693THM809/HE693THM889).  All

models feature open circuit detection, where the temperature value written to the %AI register goes to its

maximum value upon an open circuit condition.  Two models (HE693THM449 and HE693THM889) also

feature %I alarm bits which energize on an open circuit condition.  The first four %I bits are used for the

HE693THM449 and the first eight %I bits are used for the HE693THM889.