Description

Product Overview

The GE IS220PDIOH1B REV.E is a Mark VIe distributed discrete I/O pack designed for GE Speedtronic gas and steam turbine control systems. It integrates 24 optically isolated discrete inputs and 12 discrete output channels to collect field contact status and execute on/off control commands for valves, breakers, auxiliary motors and safety interlocks. Equipped with dual 10/100 Ethernet IONet ports, it supports simplex, dual and TMR triple modular redundant configurations for high-availability power generation control. This module resolves single-point failure risks in turbine safety logic, delivering 4ms hardware input debounce to filter transient noise and prevent false trips. Power plant control engineers and reliability teams rely on this REV.E revision spare module for turbine DCS maintenance and system rebuilds. Conformal coated PCB and wide temperature tolerance make it stable in turbine cabinet environments, while front panel bi-color LEDs show network, active and fault status for fast diagnostics. Word count overview:174

Technical Specifications

• Product Model: IS220PDIOH1B REV.E
• Brand: GE
• Warranty: One Year
• Input Voltage: 27.4–28 V DC
• Operating Temperature: -30 °C to 65 °C
• Storage Temperature: -40 °C to 85 °C
• Response Time: 4 ms fixed hardware input debounce
• Protection Class: Conformal coated; Class I Div 2 / ATEX Zone 2 approved
• Accuracy Class: Not applicable (discrete I/O pack)
• Output Frequency: Not applicable
• Rated Current Range: Output channel sinks ~1A @28V DC for external relay coils
• Communication Interface: Dual RJ45 10/100Base-TX IONet; 37-pin D-sub field connector
• Supported Protocols: IONet for Mark VIe control network
• Overload Capacity: 1500Vrms input isolation; 2500Vrms relay coil-contact isolation; fault detection
• Dimensions: 4.5 in × 3.5 in × 2.25 in
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Application Scenarios

• Gas Turbine Safety Interlock Monitoring: This discrete I/O pack collects E-stop, valve limit and flame detector contact signals for gas turbine control. The IS220PDIOH1B REV.E TMR capable architecture ensures interlock logic remains valid even if one I/O channel fails.
• Steam Turbine Auxiliary Motor Control: Mounted in Mark VIe turbine control racks, the module sends start/stop commands to lube oil pumps and fans, and reports motor overload and trip status back to the turbine controller.
• Combined Cycle Power Plant BMS System: The unit manages burner management discrete signals for fuel valves and purge interlocks. Hardware debounce eliminates noise-induced false alarms from high EMI turbine cabinet environments.