The DS3800NPSM is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model represents a specialized power distribution board within the DS3800 family, identified by the “NPSM” suffix which indicates a multi-output auxiliary power supply designed for field device power and control logic in auxiliary cabinets. Unlike the NPSE (logic power for I/O racks) or NPSL (high-voltage field power) series, the DS3800NPSM is designed to provide multiple low-voltage DC outputs for powering field-mounted sensors, transmitters, and control relays, as well as providing isolated power for communication interfaces. It is typically installed in auxiliary control panels, remote I/O stations, or instrumentation cabinets where a variety of voltage rails are required for field devices. The DS3800NPSM is a versatile board that combines multiple power functions into a single 4HP slot.
The DS3800NPSL1A1A is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model belongs to the “NPSL” family—a specialized high-voltage power distribution board designed for field power supply rather than backplane logic power. The “1A1A” suffix indicates the baseline revision of this product family. Unlike other DS3800 power boards that supply +5V and ±15V for logic circuits, the DS3800NPSL1A1A is designed to convert and distribute higher-voltage DC power (typically 125VDC) to field devices such as solenoid valves, actuators, and motor starters. It is typically installed in servo driver cabinets or auxiliary power distribution panels where field device power needs to be conditioned, protected, and monitored. The DS3800NPSL1A1A is a critical component for driving electro-hydraulic servo valves and other high-power field actuators in legacy Mark IV systems.
The DS3800NPSL is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model represents a completely different product family from the NPSE, NPSJ, and NPSK series, identified by the “NPSL” suffix which indicates a specialized high-voltage power distribution board designed for field power supply rather than backplane logic power. Unlike other DS3800 power boards that supply +5V and ±15V for logic circuits, the DS3800NPSL is designed to convert and distribute higher-voltage DC power (typically 125VDC or 250VDC) to field devices such as solenoid valves, actuators, and motor starters. It is typically installed in auxiliary power distribution panels or servo driver cabinets where field device power needs to be conditioned, protected, and distributed. The DS3800NPSL is a critical component for driving electro-hydraulic servo valves and other high-power field actuators.
The DS3800NPSK1J1K is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model represents a high-performance variant within the “NPSK” family, identified by the “1J1K” suffix which indicates enhanced output capacity and improved thermal management over earlier NPSK revisions. The DS3800NPSK1J1K is a compact, single-slot (4HP) board designed for auxiliary or expansion cabinets where space is limited but moderate power is required. It supplies regulated +5 VDC and ±15 VDC rails with higher current ratings than baseline NPSK models, approaching the performance of lower-end NPSE series boards while maintaining the compact 4HP form factor. This board is ideal for auxiliary racks with moderate I/O density where the baseline NPSK’s 8A is insufficient, but the full capacity of NPSE boards is not justified.
The DS3800NPSK1H1F is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model belongs to the “NPSK” family—a compact, single-slot (4HP) power board designed for auxiliary or expansion cabinets where space is limited and power demands are modest. The “1H1F” suffix indicates this is a higher-performance variant within the NPSK family, offering improved output capacity and enhanced thermal performance compared to the baseline NPSK. The DS3800NPSK1H1F supplies regulated +5 VDC and ±15 VDC rails with increased current ratings, making it suitable for auxiliary racks with moderate I/O density. It is typically installed in satellite racks, remote I/O panels, or test equipment where a smaller physical footprint is required but where the baseline NPSK’s 8A is insufficient.
The DS3800NPSK is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model represents a completely different product family from the NPSE and NPSJ series, identified by the “NPSK” suffix which indicates a specialized form factor and application focus. Unlike the NPSE boards (4HP, for I/O racks) or NPSJ boards (8HP, for main racks), the DS3800NPSK is a compact, lower-power board designed for auxiliary or expansion cabinets where space is limited and power demands are modest. It supplies regulated +5 VDC and ±15 VDC rails, but with reduced current capacity compared to the larger NPSJ series. The DS3800NPSK is typically installed in satellite racks, remote I/O panels, or test equipment where a smaller physical footprint is required.
The DS3800NPSJ1B1C is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model represents a minor revision update within the “NPSJ1B” sub-family, identified by the “1B1C” suffix which indicates component sourcing changes and manufacturing process refinements rather than functional enhancements. The DS3800NPSJ1B1C maintains the same full isolation, 22A +5V output capacity, and Ethernet diagnostics as its predecessor (1B1B), but incorporates updated component selections to address supply chain obsolescence and improve long-term reliability. This revision is a direct drop-in replacement for all NPSJ1B series boards, offering identical form, fit, and function while benefiting from the latest available components. It is the preferred choice for new spare purchases when 1B1B stock is unavailable.
The DS3800NPSJ1B1B is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model represents a major revision upgrade within the “NPSJ” family, identified by the “1B1B” suffix which indicates enhanced isolation, increased output capacity, and improved thermal performance over the baseline “1A1A” design. The DS3800NPSJ1B1B is designed for main control cabinet backplane power distribution, supplying higher current to support the most demanding Mark IV/V configurations with multiple CPU boards, communications modules, and servo driver cards. This board introduces full galvanic isolation and Ethernet-based diagnostics, making it a significant advancement over earlier NPSJ revisions. It is the preferred choice for plants upgrading their main racks or replacing failed NPSJ1A1A units with a more capable and reliable solution.
The DS3800NPSJ1A1A is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model represents the earliest revision within the “NPSJ” family, identified by the “1A1A” suffix which indicates the baseline design prior to subsequent enhancements (such as the “J” revision’s later improvements). Unlike the narrower NPSE boards (4HP), the DS3800NPSJ1A1A is a wider, higher-capacity board designed for main control cabinet backplane power distribution. It supplies regulated +5 VDC, ±15 VDC, and an auxiliary +24 VDC output to power the CPU, communications, and servo driver sections. This board is a critical component in the Mark IV/V power hierarchy, typically occupying the first slot of the main rack. The DS3800NPSJ1A1A is the foundational design upon which later NPSJ revisions (e.g., NPSJ1A1B, NPSJ1A1C) were built, and it remains fielded in many legacy installations worldwide.
The DS3800NPSJ is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model represents a significant departure from the DS3800NPSE series, identified by the “NPSJ” suffix which indicates a completely different form factor, power architecture, and application focus. Unlike the NPSE boards (4HP wide, designed for standard Mark IV/V I/O racks), the DS3800NPSJ is a wider, higher-power board intended for main control cabinet backplane power distribution. It supplies higher current capacity and includes additional auxiliary outputs to support the main CPU, communications, and servo driver sections of the turbine control system. The DS3800NPSJ is a critical component in the Mark IV/V power distribution hierarchy, typically installed in the first slot of the main rack to provide system-wide power.
The DS3800NPSE1E1G is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This model represents the highest-capacity, most feature-rich non-isolated power board within the DS3800 family, identified by the “E1G” suffix which denotes a next-generation power architecture with enhanced output capacity and advanced thermal management. The DS3800NPSE1E1G is specifically designed for densely populated racks where the B1B’s full isolation is not required but where higher current capacity (beyond the D1F’s 12A) is essential. It supplies +5 VDC / 16A and ±15 VDC / 2.5A, positioning it as the premium non-isolated option—bridging the gap between the D1F (12A) and the fully isolated B1B (20A). This board is ideal for retrofits involving high-speed counter cards, advanced vibration monitoring, or additional I/O modules that demand more power but do not justify the cost of full isolation.
The DS3800NPSE1D1F is a power supply/converter board from GE’s Speedtronic Mark IV/V turbine control series. This board represents a significant design evolution within the DS3800 family, identified by the “D1F” suffix which indicates a new generation of power stage architecture and enhanced thermal management. Unlike the C-series variants which are non-isolated, the DS3800NPSE1D1F introduces partial isolation for critical feedback paths while maintaining the 4HP compact form factor. This revision was developed to address field reports of ground-loop noise issues in plants with mixed grounding schemes, offering improved noise immunity without the full complexity (and cost) of the B-series fully isolated boards. The DS3800NPSE1D1F supplies +5 VDC / 12A and ±15 VDC / 2A, providing a mid-range power option between the C-series (10A) and B1B (20A), making it an ideal choice for moderately populated racks requiring better signal integrity.
