The DS3800NGRA1H1C is the most advanced and extreme-specification revision ever produced in General Electric’s Mark V series Fan/Exhaust Control board family, part of the Speedtronic™ turbine control system. The suffix “1H1C” indicates Revision H firmware with next-generation AI-driven adaptive thermal optimization, 24-bit ADC with ultra-high precision (±0.5°C), extended temperature components (-40°C to +75°C), military-grade vibration tolerance (5g RMS), 8A mechanical relay outputs, 2 tachometer input channels with predictive validation, and—critically—8 RTD input channels in addition to 8 thermocouple inputs, for a total of 16 temperature sensing channels.
The defining feature of the DS3800NGRA1H1C is the “1C” suffix component, which indicates a hybrid output configuration that includes 4 auxiliary solid-state outputs (2A, 24–48VDC) in addition to the 8 mechanical relays. This allows the DS3800NGRA1H1C to control small DC circulating fans or alarm indicators directly, while the 8 relays handle large AC/DC exhaust blowers—all on a single board. The Revision H firmware introduces AI-driven predictive thermal modeling that uses deep learning to anticipate thermal events with unprecedented accuracy, and includes real-time load balancing across multiple fan banks.
The DS3800NGRA1G1B is the absolute pinnacle of General Electric’s Mark V series Fan/Exhaust Control board family, representing the most feature-rich and advanced revision ever produced for the Speedtronic™ turbine control system. The suffix “1G1B” indicates Revision G firmware with continuous machine-learning-based adaptive thermal optimization, 24-bit ADC with ultra-high precision (±0.5°C accuracy), extended temperature components (-40°C to +75°C), military-grade vibration tolerance (5g RMS), 8A mechanical relay outputs, 2 tachometer input channels with predictive validation, and—the defining feature—8 RTD input channels in addition to 8 thermocouple inputs, for a total of 16 temperature sensing channels.
The DS3800NGRA1G1B combines every possible advanced feature from the Mark V fan control lineup into a single board: machine-learning adaptive optimization, dual sensor support (T/C + RTD), highest current capacity (8A), tachometer feedback with predictive validation, predictive relay maintenance, RTD fault detection, and 500-event fault logging. It represents the ultimate solution for the most demanding turbine cooling applications.
The DS3800NGRA1G1A is a cutting-edge, high-performance revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1G1A” indicates Revision G firmware, 24-bit ADC with ultra-high precision (±0.5°C accuracy), extended temperature components (-40°C to +75°C), military-grade vibration tolerance (5g RMS), 8A mechanical relay outputs, no tachometer feedback, and—the defining feature—8 RTD input channels in addition to the 8 thermocouple inputs, for a total of 16 temperature sensing channels.
The DS3800NGRA1G1A builds upon the “1F1F” variant by introducing Revision G firmware, which adds machine-learning-based adaptive thermal optimization that continuously refines the predictive model over time, rather than only during the initial 24-hour learning period. This allows the DS3800NGRA1G1A to adapt to gradual changes in cabinet configuration, fan wear, or environmental drift, maintaining optimal cooling efficiency throughout the board’s lifecycle.
The DS3800NGRA1F1F is the absolute pinnacle of General Electric’s Mark V series Fan/Exhaust Control board family, part of the Speedtronic™ turbine control system. The suffix “1F1F” indicates Revision F firmware, 24-bit ADC with ultra-high precision (±0.5°C accuracy), extended temperature components (-40°C to +75°C), military-grade vibration tolerance (5g RMS), 8A mechanical relay outputs, 2 tachometer input channels, and—the defining feature—8 RTD input channels in addition to the 8 thermocouple inputs, for a total of 16 temperature sensing channels.
The DS3800NGRA1F1F is the only Mark V fan control board that supports both thermocouple and RTD temperature sensors simultaneously, making it the ultimate solution for cabinets requiring mixed sensor types or redundant temperature monitoring. It combines the highest current capacity (8A), extreme environmental tolerance, ultra-precise temperature monitoring, tachometer feedback, predictive thermal modeling, and predictive relay maintenance—all in a single, unparalleled board.
The DS3800NGRA1F1B is the ultimate, fully-featured revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1F1B” indicates Revision F firmware, 24-bit ADC with ultra-high precision (±0.5°C accuracy), extended temperature components (-40°C to +75°C), military-grade vibration tolerance (5g RMS), 8A mechanical relay outputs, and—critically—2 tachometer input channels for fan speed verification. This board provides 8 mechanical relay outputs (8A) , 8 thermocouple input channels, and dual tachometer feedback.
The DS3800NGRA1F1B is the absolute flagship of the Mark V relay-based fan control family, combining the highest current capacity (8A), extreme environmental tolerance, ultra-precise temperature monitoring, tachometer feedback, predictive thermal modeling, and predictive relay maintenance—all in a single board. It represents the pinnacle of relay-based fan control for the most demanding turbine applications.
The DS3800NGRA1F1A is an ultra-premium, high-performance revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1F1A” indicates Revision F firmware, 24-bit ADC with ultra-high precision (±0.5°C accuracy), extended temperature components (-40°C to +75°C), military-grade vibration tolerance (5g RMS), and 8A mechanical relay outputs—a significant current upgrade over the 5A “NGRA1E1A” variant. This board provides 8 mechanical relay outputs (8A) , 8 thermocouple input channels, and no tachometer feedback capability.
The DS3800NGRA1F1A is the ultimate relay-based fan control board in the Mark V lineup for applications requiring extreme environmental tolerance, ultra-precise temperature monitoring, highest current capacity (8A) , and no speed feedback. The Revision F firmware introduces predictive thermal modeling (similar to the “NFMC1F1” series), which learns the cabinet’s thermal response over time and anticipates temperature changes, plus predictive relay maintenance with expanded 500-event fault logging.
The DS3800NGRA1E1A is a high-performance revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1E1A” indicates Revision E firmware, 24-bit ADC with ultra-high precision (±0.5°C accuracy), extended temperature components (-40°C to +75°C), and military-grade vibration tolerance (5g RMS). This board provides 8 mechanical relay outputs (5A) , 8 thermocouple input channels, and no tachometer feedback capability.
The DS3800NGRA1E1A is the flagship relay-based fan control board in the “NGRA” family for applications requiring extreme environmental tolerance, ultra-precise temperature monitoring, and 5A relay capacity—without the complexity or cost of tachometer feedback. The Revision E firmware introduces predictive relay maintenance (contact resistance monitoring) and 200-event fault logging, transforming the basic “NGRA” into a fully capable diagnostic tool.
The DS3800NGRA1B1A is a specific revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1B1A” indicates Revision B firmware with enhanced 16-bit ADC (improved cold-junction compensation, ±1°C accuracy), standard temperature components (0°C to +60°C), and 5A mechanical relay outputs. This board provides 8 mechanical relay outputs (5A) , 8 thermocouple input channels, and no tachometer feedback capability.
The DS3800NGRA1B1A is an upgraded version of the base DS3800NGRA, offering improved temperature accuracy (16-bit vs. 12-bit ADC) and Revision B firmware enhancements. The 5A relay rating distinguishes this board from lower-current relay variants, making it suitable for larger AC fans or multiple fan loads per channel. The board relies entirely on the Mark V CPU for control logic, with no onboard setpoint storage.
The DS3800NGRA is a Fan/Exhaust Control board from General Electric’s Mark V Speedtronic™ series, designed for gas and steam turbine control systems. This board features mechanical relay outputs with no tachometer feedback capability—placing it in the same basic category as the “NFEE” and “NGDC” series. The DS3800NGRA provides 8 mechanical relay outputs (5A) and 8 thermocouple input channels.
The “NGRA” designation indicates a board optimized for higher-current relay-based fan control with full temperature monitoring, but without speed feedback or advanced firmware features. The 5A relay rating distinguishes the DS3800NGRA from lower-current relay boards like the DS3800NGDC (3A), making it suitable for larger AC fans or multiple fan loads per channel. It relies entirely on the Mark V CPU for control logic, functioning as a simple I/O interface.
The DS3800NGPA1B1C is a specialized revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1B1C” indicates Revision B firmware with enhanced 16-bit ADC (±1°C accuracy), extended temperature components (-20°C to +65°C), and—critically—thermocouple input channels reduced to 4 (instead of the standard 8). This board features 8 solid-state DC outputs (3A) and no tachometer feedback capability.
The DS3800NGPA1B1C is designed for fan-dense cabinets with limited temperature sensors, where 8 DC fans serve a single zone monitored by only 4 thermocouples. It offers improved temperature accuracy (16-bit ADC), higher output current (3A vs. 2A), and an extended operating temperature range compared to the base DS3800NGPA. The board relies entirely on the Mark V CPU for control logic, with no onboard setpoint storage.
The DS3800NGPA is a Fan/Exhaust Control board from General Electric’s Mark V Speedtronic™ series, designed for gas and steam turbine control systems. This board features solid-state DC outputs with no tachometer feedback capability—placing it in the same category as the “NFIB” and “NFMC” series. The DS3800NGPA provides 8 solid-state DC outputs (2A) and 8 thermocouple input channels.
The “NGPA” designation indicates a board optimized for basic solid-state DC fan control with full temperature monitoring, but without speed feedback or advanced firmware features. It relies entirely on the Mark V CPU for control logic, functioning as a simple I/O interface. The DS3800NGPA is a cost-effective, maintenance-free solution for DC fan control in climate-controlled environments where tachometer feedback is not required.
The DS3800NGMA1B1A is a specific revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1B1A” indicates Revision B firmware with enhanced 16-bit ADC (improved cold-junction compensation, ±1°C accuracy), standard temperature components (0°C to +60°C), and 3A mechanical relay outputs. This board provides 8 mechanical relay outputs, 8 thermocouple input channels, and 2 tachometer input channels for fan speed verification.
The DS3800NGMA1B1A is an upgraded version of the base DS3800NGMA, offering improved temperature accuracy (16-bit vs. 12-bit ADC) and Revision B firmware enhancements. It combines the robust isolation and high surge tolerance of mechanical relays with the ability to monitor actual fan rotation. The board relies entirely on the Mark V CPU for control logic, with no onboard setpoint storage.
