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TECHNICAL SPECIFICATIONS:
Part Number: IS200WPDFH1ACD
Manufacturer: General Electric (GE)
Series: Mark VI
Functional Acronym: WPDF
Product Type: Optional Power Distribution Board (Daughterboard)
Hardware Variant: H1A
Number of Channels: 12 independent channels
Number of Output Relay Channels: 12 channels
Number of Fused Branches: 12 total
Fuse Rating: 3.15 A at 25°C
Input Span Support: 4-20 mA
Analog Output Current: 0-20 mA
Common Mode Voltage Range: ±5 V
Maximum Lead Resistance: 15Ω
Voltage Monitor Diagnostics Threshold: 16 V DC
Technology Type: Surface Mount Technology (SMT)
Board Dimensions: 10.16 cm wide x 3.02 cm high
Operating Temperature: -30°C to +65°C (-22°F to +149°F)
Repair / Evaluation Lead Time: 3–7 Business Days
Availability: In Stock
Country of Origin: United States (USA)
Manual Reference: GEH-6421H
The IS200WPDFH1ACD is an Optional Power Distribution Daughterboard designed and manufactured by General Electric as a high-reliability component for the Mark VI Speedtronic Gas Turbine Control System. WPDFH1A is a daughterboard to TRLYH#F to supply power to the customer solenoids. WPDF holds two power distribution circuits, which can be independently used for standard 125 V dc, 115 V ac, or 24 V dc sources. Each section consists of 6 fused branches that provide power to the TRLYH#F terminal board. Each branch has its own voltage monitor across its fuse pair secondary. Each of these voltage detectors is fanned out to three independent open-collector drivers for feedback to each of the I/O processors R, S, T. The WPDF should not be used without TRLYH#F. Fused power flows through this board down to the TRLY terminal board points. Fuse power feedback is controlled by the TRLY.
POWER DISTRIBUTION CIRCUITS AND FUSING:
The optional WPDF power distribution board mounts on top of TRLY, making connections at J1 and J2. The board is held in place with one screw located at the center of the WPDF board. Power for the two sections of the board is wired in through three-pin connectors J1 and J4, and this can be daisy-chained out through adjacent plugs J2 and J3.
The WPDF architecture hosts two independent power distribution circuits (PDCs). These sections can be energized concurrently or autonomously using standard industrial field power profiles, including 125 V DC, 115 V AC, or 24 V DC loops. Each PDC section splits its line into 6 branch segments, resulting in 12 total branches protected by industrial-grade fuses rated at 3.15 A. Fused excitation power safely flows through the daughterboard layers down into the integrated TRLY terminal board termination nodes.
TRIPLE REDUNDANT DIAGNOSTIC VOTE FEEDBACK:
To prevent a field short from causing blind system blackouts, each of the 12 branch paths features a localized secondary voltage detector circuit. When a fuse clears, or line potential falls below the 16 V DC verification mark, the respective onboard voltage detector asserts an error flag. This alarm status is fanned out simultaneously via three independent open-collector hardware drivers, passing isolated health metrics back to the primary R, S, and T Mark VI I/O processors for immediate real-time display within the operator's HMI dashboard.
INSTALLATION & MECHANICAL INTERCONNECTS:
The customer's 12 solenoids are wired to two I/O terminal blocks mounted on the terminal board as shown in the following figure. Each block is held down with two screws and has 24 terminals accepting up to #12 AWG wires. A shield termination strip attached to chassis ground is located immediately to the left side of each terminal block. Solenoid power for outputs 1-12 is available if the WPDF daughterboard is used. Alternatively, customer power may be wired to the terminal block.
Field wiring for the 12 system solenoids routes straight to the twin barrier-style I/O terminal strips (TB1 and TB2) situated on the base terminal board layout. Each block contains 24 high-torque screw connections capable of seating up to #12 AWG field conductors. Directly to the left of each terminal bank, an integrated, chassis-grounded shield termination strip is provided to suppress transient ambient noise. Solenoid loop power becomes active once the WPDF daughterboard receives supply power from the 3-pin J1 and J4 connectors, which can also be daisy-chained outward across neighboring J2 and J3 connection plugs.
OPERATIONAL CHARACTERISTICS:
The same relays are used for the ac and dc voltage levels given in the Specification section. Also, the same relays are used on the H1F and H2F boards, but the circuit is different. Relay drivers are mounted on the relay terminal board and drive the relays at the frame rate. The relay outputs have failsafe features so that when a cable is unplugged or communication with the associated I/O board or I/O pack is lost, the inputs vote to de-energize the corresponding relays. This board only supports TMR applications. The relay control signals are routed into TRLY from the three I/O processors R, S, and T through plugs JR1, JS1, and JT1. These signals directly control the corresponding relay driver for each TMR section.
The control signals governing the relay array are routed straight into the TRLY base assembly from the independent R, S, and T I/O processors. These signals execute localized control over the discrete relay drivers assigned to each respective Triple Modular Redundant (TMR) processing zone. Coil excitation power remains tightly partitioned within its own designated processor feed and is never shared across alternate control zones. To enforce strict system protection, the assembly features integrated failsafe safety features; if a transmission network drop occurs or an interface cable becomes unplugged, the internal logic votes to de-energize the matching relays immediately.
WHY PARTNER WITH WORLD OF CONTROLS:
World of Controls is a leading global supplier of genuine, high-reliability OEM replacement parts for critical industrial turbine control systems, with a comprehensive specialization in the GE Speedtronic Mark V, Mark VI, and Mark VIe lines. All supplied components, including unused surplus and fully rebuilt parts, undergo thorough physical inspections and full-load Functional Verification Tests (FVT) inside specialized electronics testing laboratories to ensure absolute compliance with factory metrics. Backed by an industry-leading warranty program, 24/7 technical assistance, and express global logistical pipelines, WOC ensures minimal operational downtime and extended service lifespan for critical control infrastructure around the world.
What is the GE IS200WPDFH1ACD?
The GE IS200WPDFH1ACD is an Optional Power Distribution Daughterboard designed for the GE Mark VI Speedtronic Gas Turbine Control System. It provides fused power distribution for customer solenoids through the TRLY terminal board while offering voltage monitoring and diagnostic feedback capabilities.
What is the function of the WPDF daughterboard?
The WPDF daughterboard distributes field power to multiple solenoid outputs using two independent power distribution circuits. It provides 12 fused output branches with individual voltage monitoring to ensure reliable operation and fault detection within the turbine control system.
Which GE control system uses this power distribution board?
This optional power distribution board is specifically designed for the GE Mark VI Speedtronic turbine control platform and is installed with the TRLY terminal board in Triple Modular Redundant (TMR) applications.
How many output channels are available on this board?
The board supports 12 independent output relay channels through 12 fused branches. Each branch is protected by a 3.15 A fuse and provides power feedback monitoring for improved system diagnostics.
What voltage levels are supported by the power distribution circuits?
The board supports standard industrial power sources, including 125 V DC, 115 V AC, and 24 V DC field power configurations. The two power distribution sections can operate independently or simultaneously.
Can the WPDF daughterboard be used without the TRLY terminal board?
No, this daughterboard is designed to operate with the TRLY terminal board. It mounts directly onto the TRLY assembly and should not be used as a standalone component.
Where can I buy or repair this GE Mark VI board?
World of Controls supplies the board in unused and rebuilt conditions and provides professional repair, testing, and exchange services for GE Mark VI turbine control system components with warranty support.
