GE IC697CHS790 Series 90-70 Nine Slot Rack

1️⃣Product Overview

The GE IC697CHS790 is a 24-channel thermocouple processor board for the Mark VI turbine control system. It accepts grounded and ungrounded thermocouple inputs of types E, J, K, S, and T, plus millivolt signals, over a -8 mV to +45 mV span, and interfaces to the Mark VI controller through the corresponding TBTC terminal board. It is the standard thermocouple input board for exhaust, bearing, and casing temperature measurement on Mark VI gas and steam turbines.

2️⃣Key Specifications

• Manufacturer: GE
• Model / Part Number:IC697CHS790
• Product Family: Mark VI turbine control system
• Product Type: Thermocouple Processor Board (input board)
• Number of Channels: 24 per board
• Thermocouple Types: E, J, K, S, T (grounded or ungrounded)
• Signal Range: -8 mV to +45 mV (mV inputs supported)
• Compatible Terminal Board: TBTC
• Mounting: Mark VI I/O card rack (plug-in board)

3️⃣Key Features

• 24 Thermocouple Channels: High channel density per board for turbine temperature monitoring.
• Multi-Type Compatibility: Handles E, J, K, S, and T thermocouples with per-point linearization, plus direct mV inputs.
• Grounded / Ungrounded Support: Accepts both installation types to suit different probe configurations.
• TBTC Terminal Pairing: Works with the Mark VI TBTC terminal board for field thermocouple wiring.
• Mark VI Platform Integration: Plugs into the Mark VI I/O rack and communicates with the controller over the system bus.

4️⃣Typical Applications

• Gas turbine exhaust and bearing metal temperature measurement
• Steam turbine casing and steam-path temperature monitoring
• Thermocouple-based temperature protection and trending in Mark VI plants
• Spare-part supply for installed Mark VI control cabinets