8200-203 Product datasheet 

8200-203 Description 

8200-203 is a Woodward ProTech 203 electronic application module featuring a digital two-out-of-three voting configuration. Fully compatible with three independent magnetic pickups, this unit works seamlessly with turbine control systems to deliver flexible speed monitoring and stable industrial overspeed protection under 120 Vac/dc power conditions.

Features and Benefits

• Two-out-of-Three Voting: Employs three identical, independent speed-sensing units to prevent accidental shutdowns and eliminate single-point hardware failure.
• Flexible 120 Vac/dc Power: Operates reliably across a versatile input range of 88–132 Vac or 90–150 Vdc to match plant power requirements.
• On-Line Testing Capabilities: Integrated frequency generator allows engineers to safely test individual voter relays without interrupting machine operation.
• Hot-Swappable Subsystems: Built with a modular interior layout that permits field replacement of a failed unit while the other two blocks keep the turbine running.
• Non-Volatile Memory Logging: Continually captures peak speed values and exact trip causes to ensure critical diagnostic data survives complete power losses.

System Compatibility and Alternatives

• System Compatibility:
  Fully compatible with standard industrial magnetic pickups (MPUs) operating in the 100 Hz to 32 kHz range. Designed to interface directly with external emergency trip valves, fuel actuators, and plant monitoring networks via independent alarm and shutdown contact loops.
• Alternative Model:
  8200-201 (De-energize-to-trip, 24 Vdc version) or 8200-202 (Energize-to-trip, 120 Vac/dc version).
• Difference from Alternative Model:
  The 8200-203 utilizes a 120 Vac/dc power profile and is configured as a de-energize-to-trip system, which Woodward strongly recommends because it safely shuts down the turbine automatically if total input operating power is lost. In contrast, the 8200-201 uses a 24 Vdc input, while the 8200-202 uses an energize-to-trip mechanism that will not actuate a shutdown if power to the module is completely severed.

Competitive Advantage

• API 670 Standard Integrity: Designed to act as a completely independent safety protection layer, strictly isolated from the main governor control loop.
• On-Line Servicing Safety: Allows secure sub-component tracking, field configuration tuning, and electronic maintenance loops without risking costly industrial plant downtime.
• Rigorous Environmental Rating: Housed in a heavy-duty enclosure approved for Type 4/4X (North America) and IP54 (Europe) conditions to resist dust, temperature extremes, and vibration.

Installation & Troubleshooting FAQ

Q1: What are the correct power input wiring and grounding requirements for the 8200-203?
A: Field power supply wiring must be between 1.5 and 6 mm² (10–16 AWG) and run through an identifiable, external disconnecting means for each separate unit. The ground wires for all three internal power supplies must connect directly to the designated PE ground terminal on the chassis and to their respective block connectors to ensure proper electrical isolation.

Q2: Why is the module triggering an unexpected "MPU FAIL TIMEOUT" trip right after starting up?
A: This happens when the turbine does not ramp up past the programmed MPU failed setpoint before the MPU failed timer times out. To resolve this, verify that your customized "MPU FAILED SETPOINT" speed value and "MPU FAILED TIMEOUT" duration settings are configured appropriately to match the true startup profile and acceleration rate of your prime mover.

Q3: What causes an "INTERLOCK FAULT" message, and how should it be addressed?
A: An interlock fault is displayed when the internal micro-controller senses that the modular ribbon harnesses or interconnecting block cables inside the cabinet are disconnected or poorly seated. Isolate the power, loosen the cabinet latches, remove the unit covers, and ensure all internal cables are securely pushed down and clamped into their mating board slots.