GE IS230TNPAH2A TNPA Discrete Digital I O Terminal Board For Speedtronic Mark VI Mark VIe Turbine Control System
- Product Code: IS230TNPAH2A
- Availability: In Stock
GE IS230TNPAH2A TNPA Discrete Digital I/O Terminal Board For Speedtronic Mark VI / Mark VIe Turbine Control System
Manufacturer: GE Vernova / GE Gas Power
Part Number: IS230TNPAH2A (TNPA Discrete I/O Termination Board, 2A hardware variant)
Product Type: VME rack slide-in discrete digital signal terminal interface board, field DI/DO wiring front-end card for Mark VI I/O pack
Matching Platform: GE Speedtronic Mark VI / Mark VIe gas/steam/combined cycle turbine control system, matched with PDIA/PDII discrete I/O processing modules
Core Function: Dual barrier terminal blocks with 16 isolated digital input channels + 16 relay output channels, 24VDC wet/dry contact compatible, opto-isolation for all DI circuits, surge & EMC noise suppression, multi-J internal backplane connectors, channel open/short fault detection, metal EMI shielding frame, front field wiring terminals for breaker, valve, alarm and trip discrete signals
1. Product Overview
IS230TNPAH2A (TNPA = Terminal Board for Discrete Process Analog/Digital I/O) is the dedicated field wiring termination board for GE Mark VI VME discrete I/O packs, acting as the physical wiring bridge between on-site turbine auxiliary equipment and the PDIA/PDII digital I/O processing CPU inside the control rack.
The board is equipped with two independent screw terminal strips, providing 16 optically isolated digital inputs and 16 relay drive digital outputs, supporting standard 24VDC wet or dry contact signals widely used in power plant turbine auxiliary control: circuit breaker position feedback, isolation switch status, flame detector contact, emergency trip pushbutton, solenoid valve control, alarm lamp output and interlock signal transmission.
All input channels adopt opto-coupler isolation with 2500Vrms isolation strength to block high-voltage electromagnetic interference from the turbine hall. Built-in multi-stage surge absorption and RC filter circuits suppress transient noise to avoid false signal triggering. Multiple multi-pin J-series rear connectors transmit conditioned discrete signals to the backplane I/O processing module.
A full surrounding metal shielding frame eliminates external EMI interference; each DI/DO channel integrates open-circuit and short-circuit self-diagnosis logic, uploading wiring fault alarms to the main turbine control system. It cannot operate independently and must be matched with Mark VI VME backplane, PDIA/PDII I/O module, rack 24VDC power supply and complete turbine control cabinet to realize full-range discrete logic interlock and trip protection.
This model is standard spare hardware for old Mark VI gas/steam turbine units, widely used in power plant overhaul, cabinet transformation and daily discrete signal channel fault replacement maintenance.
2. Complete Technical Specifications
• I/O Channel Layout: 16 optically isolated digital inputs, 16 relay digital outputs, total 32 discrete signal channels
• Signal Voltage Rating: 24VDC nominal, compatible with wet contact (powered) and dry contact (passive) field sensors
• Isolation Performance: 2500Vrms optical isolation per DI channel, surge protection up to 6kV
• Output Contact Load: Max 0.5A per DO channel at 24VDC resistive load
• Signal Conditioning: Onboard surge suppressor, multi-stage RC low-pass EMI filter, reverse polarity protection
• Internal Rack Interfaces: Multi-group J-type multi-pin rear connectors for VME backplane PDIA/PDII connection
• Diagnostic Function: Per-channel open-circuit / short-circuit fault detection, fault signal upload to I/O CPU module
• Mechanical Shield: Full surrounding metal shielding frame, three-point screw fixed mounting to rack shield rail
• Power Supply: 24VDC auxiliary logic power from Mark VI VME backplane, typical power consumption <8.2W
• Operating Temperature: Industrial grade -20℃ ~ +65℃ continuous ventilation cabinet operation
• Storage Temperature: -40℃ ~ +85℃; Relative Humidity: 5% ~ 95% RH non-condensing
• Mechanical Dimension: Standard Mark VI VME rack terminal board, full assembly weight approx 0.65kg, IP20 front dustproof grade
• PCB Protection: Full IPC-CC-830 conformal coating, gold-plated internal connector pins, anti-static industrial circuit board
• System Compatibility: Full compatibility with all GE Mark VI / Mark VIe VME racks, PDIA/PDII discrete I/O processing modules
• Compliance Standards: IEC 61000 industrial EMC anti-interference standard, power turbine control equipment safety specification
3. Core Hardware Advantages
1. Integrated 16DI+16DO large-capacity discrete terminal design, single board meets full turbine auxiliary switch signal acquisition and control output demands without multiple expansion boards
2. High-strength optical isolation + multi-stage surge filter, effectively eliminates high-voltage EMI interference in turbine hall to prevent false contact signal triggering
3. Full surrounding metal shielding frame, excellent anti-electromagnetic interference performance adapting to harsh high-noise turbine cabinet environments
4. Independent open/short circuit fault detection for each channel, fast positioning of broken field wiring to reduce maintenance downtime
5. Dual barrier screw terminal layout, clear separation of input and output wiring, convenient on-site cable connection and troubleshooting calibration
4. Typical Application Scenarios
• Thermal power plant Mark VI gas turbine breaker, valve, flame and emergency trip discrete signal core terminal board
• Combined cycle power plant steam turbine auxiliary equipment interlock & alarm signal wiring interface board
• Petrochemical self-owned power station gas generator set Mark VI rack discrete I/O spare terminal module
• Offshore power platform gas turbine multi-group safety interlock and trip signal front-end wiring board
• Old Mark VI turbine control cabinet renovation, daily discrete contact channel fault replacement spare TNPA terminal board
GE Vernova © IS230TNPAH2A TNPA Discrete Digital I/O Terminal Board For Speedtronic Mark VI Turbine Control System