GE HE693THM884M High-Resolution Thermocouple Input Module

Description

Technical Specifications

• Manufacturer: General Electric (GE) / Horner APG
• Series: HE693 / Series 90-30 PLC
• Type: Thermocouple Input Module
• Number of Channels: 8 (isolated, channel-to-ground)
• Supported Thermocouple Types: J, K, T, E, R, S, B, N
• Resolution: 0.1°C / 0.1°F (configurable; also 0.5°C / 0.5°F)
• Accuracy: ±0.15% of full scale ±1°C (typical)
• Input Signal Range: -10mV to +75mV (thermocouple millivolt range)
• Cold Junction Compensation (CJC): On-board (0°C to 60°C); supports external AD592 CJC (Revision H+)
• Isolation Voltage: 2000VDC (channel-to-ground, backplane-isolated)
• A/D Conversion: Integrating type, 16-bit resolution
• Data Format: Temperature values stored in PLC %AI registers (8 registers total)
• Alarm Bits: 16 × %I bits (1 open-circuit + 1 setpoint alarm per channel)
• Setpoint Registers: 8 × %AQ registers (user-configurable alarm thresholds)
• Power Consumption: 100mA @ 5VDC; 60mA @ 24VDC
• Operating Temperature: 0°C to +60°C (32°F to 140°F)
• Storage Temperature: -40°C to +85°C (-40°F to 185°F)
• Relative Humidity: 5% to 95%, non-condensing
• Dimensions (W×H×D): 56mm × 117mm × 127mm (2.2 in × 4.6 in × 5.0 in)
• Weight: 0.34kg (0.75 lbs)
• Mounting: Standard DIN rail (Series 90-30 I/O racks)
• Certifications: CE, UL 508, CSA C22.2 No. 142

Key Features

1. 8-Channel High-Density Input: Supports up to 8 thermocouple sensors simultaneously, reducing rack space and wiring complexity for multi-point temperature monitoring.
2. Multi-Type Thermocouple Support: Compatible with J, K, T, E, R, S, B, and N-type thermocouples, accommodating a wide range of industrial temperature measurement needs (-200°C to +1800°C).
3. 0.1°C High Resolution: Delivers precise temperature data with 0.1°C/0.1°F resolution, configurable to 0.5°C/0.5°F for faster updates in less critical applications.
4. Integrated Cold Junction Compensation: On-board CJC ensures accurate temperature readings by compensating for ambient temperature changes at the module terminals. Revision H+ supports external AD592 CJC for remote isothermal junction compensation.
5. Open-Circuit & Setpoint Alarms: Each channel provides an open-circuit alarm (sensor fault detection) and a user-configurable setpoint alarm, triggering %I bits for immediate PLC notification of fault or over/under-temperature conditions.
6. 2000VDC Galvanic Isolation: Channel-to-ground isolation protects the PLC from electrical noise, voltage spikes, and ground loops in harsh industrial environments.
7. Seamless PLC Integration: Directly compatible with GE Series 90-30 PLCs, with temperature data mapped to %AI registers and alarms to %I registers for straightforward programming.
8. Robust Industrial Design: Built with vibration-resistant components and a rugged plastic housing, ensuring reliable performance in high-temperature, electrically noisy environments.

Applications

• Process Control Industries: Deployed in chemical, petrochemical, and pharmaceutical plants for monitoring reactor, furnace, and distillation column temperatures.
• Power Generation: Used in thermal power plants, gas turbines, and boiler systems to monitor exhaust gas, steam, and combustion chamber temperatures.
• Oil & Gas: Integrated into refineries, pipeline compressor stations, and offshore platforms for monitoring process heaters, reactors, and fluid temperatures.
• Food & Beverage: Applied in ovens, sterilizers, and fermentation tanks to maintain precise temperature control for food safety and quality.
• Metallurgy & Manufacturing: Utilized in steel mills, foundries, and heat treatment facilities for monitoring furnace, molten metal, and part temperatures.
• HVAC & Building Automation: Deployed in large commercial buildings and data centers for monitoring boiler, chiller, and ambient air temperatures.
• Legacy System Upgrades: Ideal for modernizing aging GE Series 90-30 PLC systems, extending operational life while maintaining high-precision temperature monitoring capabilities.

Compatibility

• PLC Compatibility: GE Series 90-30 PLC (all CPU models)
• Backplane Compatibility: Fits all standard Series 90-30 I/O racks
• Replacement Model: HE693THM884 (non-M version, identical functionality)