Product Description
Product Overview
| Category | Details |
|---|---|
| Manufacturer | Woodward |
| Model/Part Number | 9907-166 |
| Description | 505E Digital Governor designed for steam turbine control with extraction and/or admission capabilities, featuring a 32-bit microprocessor |
| Key Features | Field-programmable, AC/DC power input, supports single or dual actuators, Class 1 Div. 2 rated, replaced by 505XT (8200-1311) |
Technical Specifications
| Specification | Details |
|---|---|
| Model | 9907-166 |
| Product Line | 505E Digital Governor |
| Power Input | 88-132 VAC or 90-150 VDC |
| Inputs | 16 contact inputs (4 dedicated, 12 programmable), 6 programmable 4-20 mA current inputs |
| Outputs | 2 actuator outputs (4-20 mA), 8 relay outputs, 6 programmable 4-20 mA outputs |
| Display | Two-line, 24-character-per-line operator control panel |
| Operating Temperature | -25°C to 65°C (-13°F to 149°F) without enclosure; -20°C to 60°C (-4°F to 140°F) with optional NEMA 4X enclosure |
| Weight | Approx. 4.5 kg (10 lbs) |
| Certification | Class 1, Division 2, Groups A, B, C, D; Class 1, Zone 2, Group IIC |
External Connection Options
| Connection Type | Details |
|---|---|
| Supported Connections | Hard-wired actuator and I/O connections via terminal blocks; integrates with plant DCS via Modbus or discrete signals |
Functional Features
| Feature | Details |
|---|---|
| Turbine Control | Controls steam turbines with single extraction and/or admission using one or two actuators |
| Programmability | Field-configurable via integrated operator control panel with menu-driven software |
| Diagnostics | First-out shutdown indicator, critical speed avoidance, valve limiters, auto-start sequence |
| Upgrade Path | Replaced by next-generation 505XT (part number 8200-1311) |
Model and Configuration
| Category | Details |
|---|---|
| Base Model | 9907-166 (505E Digital Governor, AC/DC power, front panel mount) |
| Configuration | Designed for standalone or DCS-integrated operation; supports extraction/admission steam turbines |