Woodward 8200-1203 LinkNet-HT Analog 4-20 mA Module (8 AI and 2 AO)
Woodward 8200-1203 LinkNet-HT Analog 4-20 mA Module (8 AI and 2 AO)
The Woodward 8200-1203 is a specialized member of the Peak150 series, a cost-effective and highly reliable digital governor designed primarily for the control of single-valve steam turbines.
This controller is engineered to provide precise speed control for mechanical drive applications where a full-scale 505 controller might be overkill, yet superior performance and digital accuracy are required over traditional mechanical governors.
Technical Parameter Table
| Feature | Specification |
| Model Number | 8200-1203 |
| Series | Peak150 Digital Control |
| Power Supply | 90–150 Vdc or 88–132 Vac (50/60 Hz) |
| Speed Input | 1 Magnetic Pickup (MPU) or Proximity Probe (400–10,000 Hz) |
| Control Accuracy | Steady-state speed control within $\pm0.1\%$ of rated speed |
| Analog Inputs | 1 Remote Speed Setpoint (4–20 mA) |
| Analog Outputs | 1 Actuator Driver (4–20 mA or 20–160 mA) |
| Discrete Inputs | 4 Configurable (Start, Stop, Raise/Lower Speed) |
| Relay Outputs | 2 Form-C (Alarm and Shutdown/Trip) |
| Operating Temp | –25 °C to +60 °C |
| Enclosure Rating | NEMA 4X (When properly mounted) |
Product Advantages and Features
Simplicity & Reliability: Designed for “set and forget” operation in applications requiring straightforward speed governing.
Built-in Overtrip Protection: Includes a dedicated electronic overspeed trip circuit that acts independently of the main control logic for enhanced safety.
Field Programmable: Features a front-panel keypad and display for easy configuration of PID dynamics and speed ranges without needing a laptop.
Rugged Construction: The internal electronics are protected against humidity and vibration, common in industrial steam environments.
Dual Power Compatibility: The 8200-1203 specifically handles high-voltage AC or DC inputs, making it versatile for various plant power architectures.
8200-1203
Unique Product Description
The Woodward 8200-1203 is the “essentialist” of the turbine control world. While modern 505 units are packed with complex extraction logic and color screens, the Peak150 8200-1203 focuses on unwavering speed stability.
It is uniquely positioned as the ideal upgrade for aging mechanical-hydraulic governors, offering the drift-free precision of a microprocessor in a compact, durable package that doesn’t require an advanced automation degree to operate.
8200-1203
Application Cases
Boiler Feed Pumps: Maintaining constant pump pressure by regulating turbine speed in power plants.
Small Industrial Fans: Controlling draft fans in waste-to-energy or biomass facilities.
Emergency Lube Oil Pumps: Ensuring rapid start-up and stable operation of safety-critical backup pumps.
Compressor Drives: Providing basic governing for constant-load air or gas compressors in general manufacturing.
Installation and Maintenance
Mounting: The unit is intended for bulkhead or panel mounting. Ensure it is shielded from direct high-pressure steam leaks.
Wiring: Use shielded cables for the MPU (Speed Sensor) to prevent electrical noise from causing “speed jitter.”
Calibration: During commissioning, use the “Speed Test” mode to verify the overspeed trip setpoint without actually overspeeding the turbine.
Maintenance: Periodically check the MPU clearance and ensure terminal screws remain tight under vibration-heavy conditions.
Other Models in the Same Series
| Model | Series | Power Supply | Actuator Output |
| 8200-1202 | Peak150 | 18–40 Vdc | 4–20 mA / 20–160 mA |
| 8200-1300 | 505D | 18–32 Vdc | Advanced (Successor series) |
| 9907-164 | Peak150 | 24 Vdc | Standard Config |
Related Models (Successors)
As the Peak150 series is a legacy product line, many users are now transitioning to the Woodward 505D series for expanded I/O and graphical displays.
However, the 8200-1203 remains a staple in the aftermarket for direct “drop-in” replacements where panel space is restricted.