GE HE693THM809C 8‑Channel Thermocouple Input Module

Description

Technical Specifications

• Manufacturer: GE Fanuc / Horner Electric
• Model: HE693THM809C (Revision C)
• Type: 8‑Channel Thermocouple Input Module
• Compatible PLC Series: GE Series 90‑30, PACSystems RX3i
• Number of Channels: 8 differential thermocouple inputs
• Supported Thermocouple Types: J, K, N, T, E, R, S (software‑selectable per channel)
• Temperature Ranges by Type:
  • J: −210°C to +760°C
  • K: −270°C to +1372°C
  • N: −270°C to +1300°C
  • T: −270°C to +400°C
  • E: −270°C to +1000°C
  • R/S: 0°C to +1768°C
• Resolution: 0.5°C or 0.5°F (configurable)
• Accuracy: ±0.5°C typical (J/K/N/T types at 25°C)
• Input Impedance: >20 MΩ per channel
• Maximum Safe Overload: ±35 VDC
• Common‑Mode Range: ±12 VDC
• Common‑Mode Rejection: >100 dB
• A/D Conversion Type: Integrating (noise‑rejecting)
• A/D Conversion Time: 5 ms per channel
• Update Rate: 40 channels per second
• Cold‑Junction Compensation (CJC): On‑board, automatic, ±0.1°C accuracy
• I/O Memory Usage: 8 %AI (analog input) registers, 16 %I (discrete input) registers
• Power Supply: 5 VDC (from PLC backplane)
• Power Consumption: 70 mA @ 5 VDC
• Connector Type: 20‑pin screw terminal block (included)
• Dimensions (W × H × D): 96 mm × 100 mm × 35 mm
• Weight: 0.5 kg (1.1 lbs)
• Mounting: Standard Series 90‑30 / RX3i rack slot
• Environmental Ratings:
  • Operating Temperature: 0°C to +60°C
  • Storage Temperature: −40°C to +85°C
  • Humidity: 5%–95% non‑condensing
  • Vibration: 1.5 mm peak‑to‑peak, 10–55 Hz
• Protection Class: IP20
• Compliance: CE, UL, CSA for industrial control equipment
• Status: Active legacy product; available as new surplus, refurbished, or factory‑new via authorized channels

Key Features

• 8‑Channel High‑Density Input: Accepts up to 8 thermocouple sensors, reducing rack space and wiring complexity for multi‑point temperature monitoring.
• Multi‑Thermocouple Support: Compatible with J, K, N, T, E, R, and S‑type thermocouples, covering a wide range of industrial temperature measurement needs.
• High Resolution and Accuracy: Delivers 0.5°C/0.5°F resolution and ±0.5°C typical accuracy, enabling precise detection of small temperature changes for reliable process control.
• On‑Board Cold‑Junction Compensation: Integrates automatic CJC to eliminate measurement errors caused by ambient temperature variations at the module terminals.
• Software‑Configurable Parameters: Allows selection of thermocouple type, temperature unit (°C/°F), and scaling via PLC programming software, eliminating hardware jumper changes.
• Strong Noise Rejection: Utilizes integrating A/D conversion and >100 dB common‑mode rejection to suppress electrical interference from motors, VFDs, and other industrial equipment.
• Differential Input Design: Minimizes ground loop errors and enhances signal integrity in electrically noisy environments.
• Compact Rack‑Mount Design: Fits standard GE I/O racks with a lightweight, space‑saving form factor, minimizing cabinet space and installation time.
• Robust Industrial Construction: Built with conformal‑coated PCBs and rugged components to withstand vibration, dust, and temperature fluctuations in factory floor environments.
• Seamless System Integration: Connects directly to GE Series 90‑30 and RX3i PLCs, supporting high‑speed data exchange with HMIs, SCADA, and control systems via the backplane bus.

Applications

• Process Industries: Monitors reactor, furnace, and pipeline temperatures in chemical, petrochemical, pharmaceutical, and food and beverage processing plants.
• Power Generation: Measures temperatures in turbine components, generator windings, and boiler tubes in thermal, hydroelectric, and cogeneration power stations.
• Manufacturing & Automotive: Tracks temperatures in industrial furnaces, heat treatment ovens, and injection molding machines for quality control and process optimization.
• Metals & Mining: Monitors smelter, kiln, and refining equipment temperatures in steel, aluminum, and non‑ferrous metal production facilities.
• HVAC & Building Automation: Measures temperatures in large commercial buildings, data centers, and airports for climate control and energy management.
• Research & Development: Supports precision temperature monitoring in laboratory equipment, environmental chambers, and material testing systems.
• Legacy System Upgrades: Serves as a direct replacement for older GE thermocouple modules in existing Series 90‑30 installations, extending the life of legacy control systems.

Additional Notes

• The HE693THM809C is a core component of GE/Horner’s temperature measurement I/O ecosystem, widely deployed in industrial facilities worldwide.
• It is fully compatible with GE’s LogicMaster, VersaPro, and Proficy Machine Edition software, enabling seamless configuration and data integration with GE PLC programs.
• For new installations requiring higher channel counts or Ethernet connectivity, Horner offers the HE693THM166D (16‑channel) and modern Ethernet‑enabled thermocouple modules, while maintaining backward compatibility with the HE693THM809C for spare parts and replacements.