The DS3800NGMA 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 integrated tachometer feedback capability—placing it in the same hybrid category as the “NFLA” series. The DS3800NGMA provides 8 mechanical relay outputs (3A) , 8 thermocouple input channels, and 2 tachometer input channels for fan speed verification.
The “NGMA” designation indicates a board optimized for relay-based fan control with speed monitoring in climate-controlled environments. Like the DS3800NFLA, the DS3800NGMA combines the robust isolation and high surge tolerance of mechanical relays with the ability to monitor actual fan rotation. It relies entirely on the Mark V CPU for control logic, with no onboard setpoint storage.
The DS3800NGDC1A1A is a specific revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1A1A” indicates Revision A firmware (baseline), standard 12-bit ADC, and standard temperature components (0°C to +60°C). This board features 8 mechanical relay outputs (3A) , 8 thermocouple input channels, and no tachometer feedback capability—identical in function to the base DS3800NGDC but with minor component revisions.
The DS3800NGDC1A1A is a straightforward, cost-effective relay-based fan control board designed for climate-controlled environments where tachometer feedback is not required. It relies entirely on the Mark V CPU for control logic, functioning as a simple I/O interface for AC/DC fan switching with full temperature monitoring.
The DS3800NGDC 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 category as the base “NFEE” series, but with a distinct I/O configuration. The DS3800NGDC provides 8 mechanical relay outputs (3A) and 8 thermocouple input channels.
The “NGDC” designation indicates a board optimized for basic relay-based 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 DS3800NGDC is a cost-effective, straightforward solution for AC/DC fan control in climate-controlled environments where tachometer feedback is not required.
The DS3800NFMC1F1E is the ultimate high-performance revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1F1E” indicates Revision F firmware, 24-bit ADC with ultra-high precision, extended temperature components (-40°C to +75°C), military-grade vibration tolerance, 3A solid-state outputs, 8 thermocouple input channels—and the critical addition of 2 tachometer input channels. This makes the DS3800NFMC1F1E the only “NFMC” variant with speed feedback capability, effectively bridging the gap between the “NFMC” solid-state family and the tachometer-equipped “NFIA” series.
The DS3800NFMC1F1E combines all advanced features from the “1F1D” variant (predictive thermal modeling, adaptive averaging, autonomous fallback) with dual tachometer feedback, enabling closed-loop fan monitoring and verification. This board is the pinnacle of solid-state fan control in the Mark V lineup, offering comprehensive temperature sensing, speed verification, predictive analytics, and extreme environmental tolerance—all in a single, maintenance-free solid-state package.
The DS3800NFMC1F1D is a specialized, high-performance revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1F1D” indicates Revision F firmware, 24-bit ADC with ultra-high precision, extended temperature components (-40°C to +75°C), military-grade vibration tolerance, 3A solid-state outputs, and—distinctively—8 thermocouple input channels (unlike the 4-channel “1E1C” variant). The DS3800NFMC1F1D retains no tachometer feedback capability, making it the full-sensor-count solid-state board for applications requiring comprehensive temperature monitoring without speed feedback.
The Revision F firmware introduces predictive thermal modeling, which learns the cabinet’s thermal response characteristics over time and anticipates temperature changes before they occur. This allows the DS3800NFMC1F1D to proactively adjust fan speeds (via PWM commands from the CPU) or trigger ON/OFF switching earlier than traditional threshold-based systems, reducing temperature overshoot and improving overall thermal stability. This board is the ultimate solid-state solution for critical DC fan applications where temperature precision, environmental durability, and smart thermal management are paramount.
The DS3800NFMC1E1C is a premium revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1E1C” indicates Revision E firmware, 24-bit ADC with ultra-high precision, extended temperature components (-40°C to +75°C), military-grade vibration tolerance, and 3A solid-state outputs—a 50% current increase over the base DS3800NFMC (2A). This board features 4 thermocouple input channels and no tachometer feedback capability, maintaining the fan-dense, sensor-light design philosophy of the “NFMC” family.
The DS3800NFMC1E1C is the flagship solid-state fan control board in the Mark V lineup for applications requiring extreme environmental tolerance, high precision temperature monitoring, and autonomous fallback logic—without the complexity or cost of tachometer feedback. The Revision E firmware introduces onboard temperature threshold logic, adaptive temperature averaging, and 200-event fault logging, transforming the simple “NFMC” into a fully capable standalone thermal manager.
The DS3800NFMC 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 (2A) with no tachometer feedback capability—placing it in the same category as the “NFIB” series, but with a distinct I/O configuration and firmware baseline. The DS3800NFMC provides 8 solid-state DC outputs, 4 thermocouple input channels, and no tachometer inputs.
The “NFMC” designation indicates a board optimized for fan-dense cabinets with limited temperature sensors, similar to the DS3800NFIB1D1C and DS3800NFIA1B1C, but with the base-level 12-bit ADC (±2°C accuracy) and standard temperature range (0°C to +60°C). The DS3800NFMC is a cost-effective, straightforward solid-state solution for DC fan control in applications where high precision and advanced features are not required.
The DS3800NFLA1D1D is a premium revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1D1D” indicates Revision D firmware, 24-bit ADC with ultra-high precision, extended temperature components (-40°C to +75°C), military-grade vibration tolerance, and 8 mechanical relay outputs rated at 8A—the highest current capacity in the “NFLA” family. This board retains 8 thermocouple input channels and 2 tachometer input channels, offering the full feature set without compromise.
The DS3800NFLA1D1D is the flagship relay-based fan control board in the Mark V lineup, combining high-current switching (8A) with tachometer feedback, exceptional temperature precision (±0.5°C), and extreme environmental tolerance. The Revision D firmware introduces predictive relay maintenance (contact resistance monitoring) and adaptive tachometer filtering that automatically adjusts to fan speed variations, reducing false failure alarms. This board is designed for the most demanding turbine applications where reliability, accuracy, and durability are paramount.
The DS3800NFLA1C1C is an advanced revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1C1C” indicates Revision C firmware, enhanced 16-bit ADC with improved cold-junction compensation, extended temperature component selection (-20°C to +65°C), and—critically—thermocouple input channels reduced to 4 (instead of the standard 8). This board features 8 mechanical relay outputs (5A) and 2 tachometer input channels, combining high-current AC/DC switching with speed monitoring capability.
The DS3800NFLA1C1C represents a significant upgrade over the base DS3800NFLA, offering higher relay current (5A vs. 3A), improved temperature accuracy (±1°C vs. ±2°C), and extended environmental tolerance. The reduced thermocouple count (4 channels) reallocates hardware resources to enhanced tachometer signal conditioning, making the DS3800NFLA1C1C ideal for cabinets where fewer temperature sensors serve multiple fans, but reliable speed feedback is essential.
The DS3800NFLA 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 (like the “NFEE” series) with integrated tachometer feedback capability (like the “NFIA” series)—making it a hybrid solution that combines high-current AC/DC switching with speed monitoring. The DS3800NFLA provides 8 mechanical relay outputs (3A) , 8 thermocouple input channels, and 2 tachometer input channels for fan speed verification.
The DS3800NFLA is designed for applications requiring the robust isolation and high surge tolerance of mechanical relays, combined with the ability to monitor actual fan rotation for safety-critical cooling systems. Unlike the “NFEE” series (which lacks tachometer inputs), the DS3800NFLA allows the Mark V CPU to confirm that commanded fans are actually running—a critical feature for turbine cabinets where airflow failure could lead to catastrophic overheating.
The DS3800NFIB1D1C is a specialized revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1D1C” indicates Revision D firmware with enhanced 16-bit ADC, extended temperature components (-20°C to +65°C), 3A solid-state outputs, and—critically—thermocouple input channels reduced to 4 (instead of the standard 8). Like all “NFIB” variants, this board includes no tachometer feedback capability.
The DS3800NFIB1D1C is the thermal counterpart to the DS3800NFIA1B1C: both feature reduced thermocouple inputs (4 channels) and 8 solid-state outputs, but the DS3800NFIB1D1C omits tachometer inputs while offering the advanced Revision D adaptive averaging algorithm. This configuration is ideal for fan-dense cabinets where multiple fans serve a single temperature zone and speed feedback is unnecessary, but where minimizing fan cycling is a priority.
The DS3800NFIB1D1B is an advanced revision of General Electric’s Mark V series Fan/Exhaust Control board, part of the Speedtronic™ turbine control system. The suffix “1D1B” indicates Revision D firmware, enhanced 16-bit ADC with improved cold-junction compensation, extended temperature component selection (-20°C to +65°C), and 3A solid-state output capability. This board provides 8 solid-state DC outputs (3A) , 8 thermocouple input channels (16-bit, ±1°C accuracy) , and—like the base DS3800NFIB—no tachometer feedback capability.
The DS3800NFIB1D1B represents a significant upgrade over the base model, featuring onboard temperature threshold logic (like the “NFIA1B1B”) that enables autonomous fan control during backplane communication loss. The Revision D firmware introduces adaptive temperature averaging that smooths rapid temperature fluctuations, reducing unnecessary fan cycling and extending fan lifespan. This makes the DS3800NFIB1D1B the most capable “NFIB” variant available.
