GE IC3600PTJA4

• Output Signal: Time-delayed logic output compatible with IC3600 backplane
• Timing Accuracy: High stability with minimal drift over time and temperature
• Adjustment Method: Front-mounted potentiometer or selector switch for delay setting
• Mounting: Printed circuit board with edge connector for chassis integration
• Connector Type: Edge connector for backplane interface, terminal blocks for external wiring
• Operating Temperature: 0°C to 55°C
• Storage Temperature: -25°C to 70°C
• Humidity Range: 5% to 95% relative humidity, non-condensing
• Dimensions: Standard IC3600 board size (approximately 12 x 10 inches)
• Weight: Approximately 1.1 kg

Functional Features

• Provides precise time-delay functionality for control sequence management
• Supports both on-delay and off-delay timing modes depending on configuration
• Utilizes solid-state timing circuits for improved reliability over electromechanical timers
• Includes calibration controls for accurate setting of time intervals
• Offers electrical isolation between input and output circuits to prevent noise coupling
• Designed for seamless integration with other IC3600 logic and amplifier modules
• Enables coordination of auxiliary equipment startup and shutdown sequences
• Enhances system safety by enforcing required hold times and cooldown periods

Applications

• Steam and gas turbine control systems in legacy power generation plants
• Boiler control and protection circuits requiring timed interlocks
• Sequencing of lube oil pumps, jacking oil systems, and cooling circuits during turbine startup
• Use in emergency trip reset delays and post-lube timing functions
• Integration into fire protection, overtemperature, and overload shutdown systems
• Retrofit and maintenance of original IC3600 control cabinets
• Industrial process systems requiring reliable time-based logic execution

System Integration
The IC3600PTJA4 is installed in the IC3600 control cabinet via an edge connector that interfaces with the backplane. It receives discrete logic signals from input modules or field devices and introduces a precisely controlled delay before sending the output signal to downstream components such as relay drivers, alarm circuits, or final control elements. The module operates within a hardwired logic architecture where timing functions are implemented through analog RC circuits or early digital timing components, ensuring deterministic response without software dependency.

Reliability and Support
As part of the pioneering IC3600 series introduced in the 1960s, the IC3600PTJA4 has demonstrated long-term operational reliability in critical industrial settings. While GE no longer supports this platform for new installations, the module remains in service in certain legacy power and industrial facilities due to its durability and functional integrity. Replacement units, refurbished modules, and technical support are available through specialized industrial automation vendors and third-party service providers experienced in maintaining vintage GE control systems.