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        GE HE693THM884G
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        • Lifecycle Status

          Discontinued / Obsolete by OEM
          Apter Power maintains an extensive inventory of legacy GE automation modules, offering trusted replacement parts to sustain older industrial control networks.

        HE693THM884G

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        The GE HE693THM884G is a high-resolution, 8-channel thermocouple input module designed specifically for use with the GE Fanuc Series 90-30 PLC system.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
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        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for HE693THM884G

        • Manufacturer:
          General Electric
        • Part Number:
          HE693THM884G
        • Product Family:
          GE 90-30 Series PLC
        • Product Type:
          8 channel thermocouple input module
        • Stock:
          1
        • Number of Channels:
          8 Thermocouple Inputs
        • Supported Sensor Types:
          J, K, N, T, E, R, S, B, C, X
        • Resolution:
          0.1°C (User-selectable: 0.5°C, 0.5°F, 0.1°C, 0.1°F)
        • Accuracy:
          ±1°C
        • A/D Conversion Type:
          18-Bit Integrating
        • A/D Conversion Time:
          5 ms
        • Scan Rate:
          40 channels per second
        • Input Impedance:
          > 20 MΩ
        • Common Mode Rejection:
          > 100 dB
        • Power Consumption:
          100 mA @ 5 VDC
        • Weight:
          0.36 kg
        • Estimated shipping dimensions:
          3.5x13x13.5cm
        • Tariff Code:
          8537101190
        • Country of origin:
          USA
        • Place of shipment:
          Xiamen,Fujian,China
        By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

        More Information

        Overview Manuals Specifications Application Cases Performance & Efficiency Monitoring & Control

        Features:

        • Direct Interface for Eight Thermocouple Channels to the Series 90-30 Rack Backplane
        • Integrated High-Resolution A/D Conversion with Per-Channel Diagnostic Support
        • Functions Alongside Standard Series 90-30 CPUs and Expansion Modules
        The HE693THM884G operates as an 8-channel thermocouple input module in a Series 90-30 rack, providing high-precision temperature data acquisition for the PLC system. It continuously converts incoming analog signals from J, K, T, E, N, R, and S type thermocouples to digital values with 0.1°C resolution and stores these values in %AI input registers, distributing this data through the rack backplane to support real-time monitoring and control of thermal processes. Cold junction compensation is integrated within the HE693THM884G, and using the built-in open circuit detection feature will allow immediate fault indication by driving the channel value to maximum in the event of a sensor disconnection. The HE693THM884G has made improvements in several areas over previous thermocouple input designs in addition to incorporating 18-bit integrating A/D conversion and universal thermocouple type support within the Series 90-30 rack.

        The HE693THM884G provides essential temperature input functions common to the entire control system, and is a critical component of the process monitoring path, directly affecting the proper, normal operation of temperature-dependent control loops. One or more HE693THM884G modules may be installed per rack depending on the number of temperature zones to be monitored. The HE693THM884G occupies a single full-height slot in the rack and can be installed in any available I/O slot position, drawing 100 mA at 5 VDC from the backplane.

        For multi-channel alarm applications, the Series 90-30 system utilizes the HE693THM884G module's dedicated alarm bits assigned to each input channel. In addition to standard temperature measurement operation, the alarm configuration also performs automatic fault detection. The HE693THM884G dual-alarm system executes diagnostics using the internal 16 %I alarm bits specified for the module options. Using this method, the diagnostic system continually monitors the health of all eight channels. If the module detects that a thermocouple channel is no longer providing a valid signal (outside configured tolerance levels or open circuit condition), it will automatically set the corresponding alarm bit and update the System Event status for that channel.

        The HE693THM884G General Electric 8 channel thermocouple input module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        GE HE693THM884G 8 channel thermocouple input module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        General Electric HE693THM884G 8 channel thermocouple input module Specs

        General

        • Manufacturer General Electric
        • Model HE693THM884G
        • Condition New Original ready stock
        • Product Family HE693THM449,HE693THM665
        Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
        • Manufacturing & Process Control: Ideal for monitoring large-scale production lines, ovens, and chemical reactors.
        • Energy Sector: Used in turbine control systems and power plants to manage heat levels in harsh operating conditions.
        • Heavy Industry: Suitable for high-temperature processes such as smelting or metal fabrication, particularly when using Type J and K thermocouples.
        • Marine Automation: Utilized in both onshore and offshore industrial automation for critical temperature feedback.
        • Direct Processing: Performs all analog and digital processing on-board, reducing the complexity of the control loop.
        • High Resolution: Offers 0.1°C resolution with an accuracy of ±1°C for most thermocouple types.
        • Rapid Scanning: Features a scan rate of up to 40 channels per second for fast-changing environments.
        • Wide Compatibility: Supports a broad range of thermocouple types including J, K, N, T, E, R, S, B, C, and X.
        • Internal Diagnostics: Features open circuit detection for each channel; if a sensor is disconnected, the module can alert the PLC immediately through dedicated alarm bits.
        • Configurable Alarms: Includes setpoint alarms for each channel, with thresholds configured directly through PLC registers (%AQ).
        • Automatic Compensation: Built-in Cold Junction Compensation (CJC) ensures accurate readings by automatically adjusting for temperature variations at the terminal base.
        • Flexible Formatting: Temperature values can be reported in various increments (0.5°C, 0.5°F, 0.1°C, or 0.1°F) to match specific process requirements.
        Description
        The GE HE693THM884G is an 8-channel thermocouple input module specifically designed for the GE Fanuc Series 90-30 PLC platform. This module enables direct connection of thermocouple temperature sensors to the PLC without requiring external signal conditioning devices such as transducers or transmitters, with all analog and digital processing of the thermocouple signal performed directly on the module itself . The HE693THM884G supports multiple thermocouple types including J, K, N, T, E, R, and S, covering wide temperature ranges such as Type J from -210°C to +760°C and Type K from -270°C to +1372°C, making it highly versatile for diverse industrial temperature measurement requirements.

        The HE693THM884G delivers high-precision temperature monitoring with a resolution of 0.1°C and an accuracy of ±1°C for most thermocouple types, ensuring reliable data acquisition for critical process control applications . The module features eight thermocouple channels assigned to 8 %AI input registers, along with 16 %I alarm bits that include one open circuit alarm and one setpoint alarm for each channel, providing comprehensive diagnostic capabilities for fault detection and process safety. 

        This thermocouple input module is specifically designed to address the challenges of precise multi-point temperature monitoring in industrial automation systems. The HE693THM884G eliminates the need for external signal processing equipment, reducing system complexity, installation costs, and potential points of failure while delivering high-resolution temperature data directly to the PLC's I/O table . Its built-in cold junction compensation ensures accurate readings across varying ambient conditions, and the open circuit detection feature—where the temperature value goes to its maximum value upon an open circuit condition—provides immediate fault indication for each channel . The module's compact design allows seamless integration into standard Series 90-30 PLC racks, requiring 100 mA at 5 VDC power consumption from the backplane.

        The HE693THM884G is ideal for real-time temperature monitoring applications across manufacturing, HVAC systems, energy production, and process control industries where precise thermal management is essential . In manufacturing environments, this module solves the problem of monitoring multiple temperature zones simultaneously—such as in plastic extrusion, metal heat treatment, or food processing—where maintaining exact temperature profiles directly impacts product quality and process efficiency. 

        The HE693THM884G's ability to handle eight independent thermocouple inputs in a single module slot makes it particularly valuable for applications requiring dense temperature monitoring without expanding the PLC rack footprint. In energy and utility applications, the module provides reliable temperature data for turbine monitoring, boiler control, and heat exchanger management, where its rugged design and built-in diagnostics ensure continuous operation in demanding environments . For process control applications such as chemical reactors or pharmaceutical manufacturing, the HE693THM884G's high accuracy and fast response times enable tight temperature control loops, while the per-channel alarm functionality supports safety interlocks and preventive maintenance strategies by immediately alerting operators to sensor failures or temperature deviations beyond set limits.
        Alternative Names
        HE693THM409 HE693THM449 HE693THM665 HE693THM666 HE693THM668 HE693THM809 HE693SNP900 HE693RTD600T
        Technical notes
        The GE HE693THM884G is a high-density, 8-channel thermocouple input module designed for Series 90-30 PLCs, delivering exceptional temperature monitoring with a 16-bit resolution. It ensures precise process control by supporting multiple thermocouple types with an accuracy of up to ±0.5°C.
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        FAQS

        The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
        VIEW ALL FAQS
        What makes the HE693THM884G suitable for precise temperature measurement?
        The module features high-resolution signal conversion, ensuring accurate and stable temperature data is delivered directly to the PLC's I/O table. This level of precision is essential for processes where even small temperature variations can impact product quality.
        How does the HE693THM884G handle signal interference and long-distance wiring?
        It uses a high-impedance differential input design combined with strong common-mode rejection, effectively minimizing noise and signal degradation. This ensures reliable measurements even in environments with long cable runs or high electrical interference.
        What advantages does direct sensor-to-PLC integration provide?
        By allowing thermocouples to connect directly to the PLC, the HE693THM884G reduces system complexity, lowers installation costs, and eliminates potential failure points associated with external signal conditioning devices.

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