HE693THM884M Overview

The Thermocouple Input Module General Electric HE693THM884M is a high-resolution thermocouple input module for GE Series 90-30 PLCs, featuring eight channels supporting J/K types with 0.1°C resolution and open circuit detection.

Technical Data Summary

• Channel Configuration: Features eight thermocouple input channels supporting J and K thermocouple types.

• High Resolution: Delivers 0.1°C resolution with 18-bit integrating A/D conversion for precise temperature measurement.

• Alarm Functions: Provides 16 %I alarm bits, including open circuit and setpoint alarms for each channel.

• Fast Scan Rate: Scans 40 channels per second with 5 ms A/D conversion time for responsive monitoring.

• Input Protection: Offers >20MΩ impedance and withstands ±35V sustained overload without damage.

• Power Requirements: Consumes 100mA from the +5 VDC backplane supply with 5% to 95% humidity tolerance.

FAQ

Q1: What is the primary function of the HE693THM884?

A1: It is a high-resolution thermocouple input module that allows direct connection of J and K type sensors to a PLC without external signal processing.

Q2: What is the resolution and scan rate of this module?

A2: It features 0.1°C resolution with an 18-bit integrating A/D converter and scans 40 channels per second.

Q3: How many channels and alarm bits does it have?

A3: It has eight thermocouple channels, plus 16 %I alarm bits providing open circuit and setpoint alarms for each channel.

Q4: What temperature ranges are supported for J and K types?

A4: For J-type, the range is -210 to +760°C. For K-type, the range is -270 to +1372°C.

Q5: What cold junction compensation feature is available?

A5: Revision H or later supports auto-detected external AD592 compensation, allowing remote isothermal terminal strip operation.