The DS3800NHVE1A1A is a specific revision of General Electric’s Mark V series Fan/Exhaust Control board, designed for high-voltage DC applications with a hybrid output configuration. The suffix “1A1A” indicates Revision A firmware (baseline), standard 12-bit ADC (±2°C accuracy), and standard temperature components (0°C to +60°C). This board provides:
8 mechanical relays (1A @ 250VDC) for high-voltage exhaust fans
4 solid-state outputs (2A @ 24–48VDC) for low-voltage circulating fans or alarms
8 thermocouple input channels for temperature monitoring
The DS3800NHVE1A1A is the original, unmodified version of this hybrid high-voltage board—ideal for replacing like-for-like in legacy systems that require both 250VDC relay switching and 24–48VDC solid-state auxiliary control on a single board.
The DS3800NHVE is a specialized Fan/Exhaust Control board from General Electric’s Mark V Speedtronic™ series, designed for high-voltage DC applications with a hybrid output configuration. The suffix “NHVE” indicates a board with mechanical relay outputs (for high-voltage DC) and solid-state auxiliary outputs (for low-voltage DC), no tachometer feedback, and 8 thermocouple input channels.
This board provides:
8 mechanical relays (1A @ 250VDC) for high-voltage exhaust fans
4 solid-state outputs (2A @ 24–48VDC) for low-voltage circulating fans or alarms
8 thermocouple input channels for temperature monitoring
The hybrid design of the DS3800NHVE allows a single board to manage both high-voltage DC cooling systems and low-voltage auxiliary fans, reducing rack space and simplifying wiring.
The DS3800NHVD1E1E is the ultimate flagship revision of General Electric’s Mark V series Fan/Exhaust Control board, engineered for 250VDC high-voltage fan applications with dual temperature sensor support. The suffix “1E1E” indicates Revision E firmware with 24-bit ADC (±0.5°C / ±0.3°C accuracy), extended temperature components (-40°C to +85°C), military-grade vibration tolerance (5g RMS), high-voltage DC relay outputs (1A @ 250VDC), predictive thermal modeling, and—critically—8 RTD input channels in addition to 8 thermocouple inputs for a total of 16 temperature sensing channels.
This board represents the absolute pinnacle of high-voltage DC fan control in the Mark V lineup, combining extreme environmental tolerance, dual-sensor temperature monitoring (T/C + RTD), predictive relay maintenance, and AI-driven thermal modeling—all in a specialized 250VDC package.
The DS3800NHVD1E1B is the ultimate flagship revision of General Electric’s Mark V series Fan/Exhaust Control board, engineered for 250VDC high-voltage fan applications. The suffix “1E1B” indicates Revision E firmware with 24-bit ADC (±0.5°C accuracy), extended temperature components (-40°C to +85°C), military-grade vibration tolerance (5g RMS), high-voltage DC relay outputs (1A @ 250VDC), and predictive thermal modeling.
This board represents the absolute pinnacle of high-voltage DC fan control in the Mark V lineup, combining extreme environmental tolerance, ultra-precise temperature monitoring, predictive relay maintenance, and AI-driven thermal modeling—all in a specialized 250VDC package.
The DS3800NHVD1D1B is a premium, high-performance revision of General Electric’s Mark V series Fan/Exhaust Control board, specifically engineered for 250VDC high-voltage fan applications. The suffix “1D1B” indicates Revision D firmware with 24-bit ADC (±0.5°C accuracy), extended temperature components (-40°C to +75°C), military-grade vibration tolerance (5g RMS), and high-voltage DC relay outputs with predictive relay maintenance. This board provides 8 mechanical relay outputs (1A @ 250VDC) and 8 thermocouple input channels—with no tachometer feedback.
The Revision D firmware transforms the basic “NHVD” into a sophisticated diagnostic tool with ultra-precise temperature monitoring, predictive relay maintenance, and extreme environmental tolerance—all while maintaining the high-voltage DC switching capability.
The DS3800NHVD1C1B is a specialized revision of General Electric’s Mark V series Fan/Exhaust Control board, designed for 250VDC high-voltage fan applications. The suffix “1C1B” indicates Revision C firmware with 16-bit ADC (±1°C accuracy), extended temperature components (-20°C to +65°C), and high-voltage DC relay outputs. This board provides 8 mechanical relay outputs (1A @ 250VDC) and 8 thermocouple input channels—with no tachometer feedback.
The Revision C firmware enhances the board with improved cold-junction compensation and better temperature accuracy, making this the most advanced 250VDC relay-based fan control board in the Mark V lineup without tachometer feedback.
The DS3800NHVD is a specialized Fan/Exhaust Control board from General Electric’s Mark V Speedtronic™ series, designed for high-voltage DC applications. The suffix “NHVD” indicates a board with mechanical relay outputs, no tachometer feedback, and high-voltage DC output capability (up to 250VDC)—making it suitable for the most demanding high-voltage fan systems. This board provides 8 mechanical relay outputs (1A @ 250VDC) and 8 thermocouple input channels.
The DS3800NHVD is engineered for extreme high-voltage DC applications (e.g., 220VDC or 250VDC systems found in specialized industrial, railway, or high-voltage turbine environments). It relies entirely on the Mark V CPU for control logic.
The DS3800NHVB is a Fan/Exhaust Control board from General Electric’s Mark V Speedtronic™ series. The suffix “NHVB” indicates a board with mechanical relay outputs, no tachometer feedback, and a specialized high-voltage DC output configuration (up to 125VDC)—distinguishing it from standard 30VDC relay boards. This board provides 8 mechanical relay outputs (2A @ 125VDC) and 8 thermocouple input channels.
The DS3800NHVB is designed for applications requiring high-voltage DC fan control (e.g., 110VDC or 125VDC systems common in older turbine installations or military/marine environments). It relies entirely on the Mark V CPU for control logic.
The DS3800NGTA1F1E is a flagship revision of General Electric’s Mark V series Fan/Exhaust Control board. The suffix “1F1E” indicates Revision F firmware with 24-bit ADC (±0.5°C accuracy), extended temperature components (-40°C to +85°C), military-grade vibration tolerance (5g RMS), 8A mechanical relay outputs, 8 thermocouple input channels, and no tachometer feedback.
This board represents the pinnacle of the “NGTA” family, combining the highest relay current (8A), ultra-precise temperature monitoring, predictive thermal modeling, predictive relay maintenance, and an extended +85°C operating limit—all without the complexity of tachometer feedback.
The DS3800NGTA1E1D is a premium revision of General Electric’s Mark V series Fan/Exhaust Control board. The suffix “1E1D” indicates Revision E firmware with 24-bit ADC (±0.5°C accuracy), extended temperature components (-40°C to +75°C), military-grade vibration tolerance (5g RMS), 5A mechanical relay outputs, and 8 thermocouple input channels—with no tachometer feedback.
The Revision E firmware builds upon the “1D1D” variant by adding predictive thermal modeling and enhanced fault logging (500 events vs. 200), making this the most advanced 5A relay-based fan control board without tachometer feedback in the Mark V lineup.
The DS3800NGTA1D1D is a high-performance revision of General Electric’s Mark V series Fan/Exhaust Control board. The suffix “1D1D” indicates Revision D firmware with 24-bit ADC (±0.5°C accuracy), extended temperature components (-40°C to +75°C), military-grade vibration tolerance (5g RMS), 5A mechanical relay outputs, and 8 thermocouple input channels—with no tachometer feedback.
This board is a direct upgrade from the base DS3800NGTA, offering ultra-precise temperature monitoring, extreme environmental tolerance, predictive relay maintenance, and higher current capacity (5A vs. 3A) in a basic relay-based package.
The DS3800NGTA is a Fan/Exhaust Control board from General Electric’s Mark V Speedtronic™ series. This board features mechanical relay outputs with no tachometer feedback capability—placing it in the basic relay-based category. The DS3800NGTA provides 8 mechanical relay outputs (3A) and 8 thermocouple input channels.
The “NGTA” designation indicates a board optimized for basic relay-based fan control with full temperature monitoring, similar to the “NGDC” series, but with a distinct component baseline. The 3A relay rating makes it suitable for standard AC/DC fans. It relies entirely on the Mark V CPU for control logic.
