| Part Number |
9907-1183 |
| Official Model Name |
505E Enhanced Digital Turbine Governor (24V Low-Voltage Version) |
| Manufacturer |
Woodward, USA |
| Core Processor |
32-bit high-speed microcontroller |
| Primary Function |
Closed-loop speed, load, extraction/admission pressure control for steam turbines |
| Nominal Power Supply |
24 V DC |
| Operating DC Voltage Range |
18 V DC ~ 32 V DC |
| Typical Power Consumption |
≤ 25 W |
| Main HMI Interface |
Integrated membrane keypad + multi-line LCD display |
| Analog Input Channels |
6 isolated analog inputs (4–20 mA / 0–10 V selectable) |
| Analog Output Channels |
6 isolated analog outputs (4–20 mA drive for servo actuators) |
| Serial Communication Ports |
2 independent Modbus RTU/ASCII ports (RS485) |
| Configuration Software |
Woodward Control Assistant PC software |
| Speed Regulation Steady-State Accuracy |
±0.25% rated speed |
| Control Loop Execution Time |
< 10 ms cycle time |
| Built-in Control Algorithms |
PID speed control, extraction/admission PID, load sharing, ratio limiter, over-speed protection logic |
| Safety Functions |
Zero-speed detection, turbine over-speed trip, parameter password protection |
| Front Panel Protection Rating |
IP54 (dust & splash resistant) |
| Rear Terminal Protection Class |
IP20 |
| Continuous Operating Temperature |
-40 °C ~ +70 °C |
| Recommended Stable Working Range |
-25 °C ~ +65 °C |
| Storage & Transit Temperature |
-40 °C ~ +85 °C |
| Ambient Humidity |
5%–95% RH, non-condensing |
| Overall Dimension (W × H × D) |
356 mm × 279 mm × 102 mm |
| Net Unit Weight |
Approx. 1.8 kg |
| Mounting Type |
Panel flush mounting for control cabinet |
| Conformal Coating |
Sulfur-resistant conformal coated circuit board |
| Compatibility |
Standalone operation or integration with plant DCS systems |
| Typical Applications |
Utility steam turbogenerators, industrial extraction steam turbines, turboexpanders, mechanical drive compressors in power & petrochemical plants |
| Certifications |
CE, industrial EMC compliance, Class I Division 2 hazardous location rated |
