Product Description
Woodward 8406-121 Electronic Governor
Product Overview
- The Woodward 8406-121 is an electronic governor, designed for precise speed control of engines in industrial applications such as power generation, marine propulsion, and industrial processes. This microprocessor-based control unit integrates speed control and actuation functions, typically used for diesel, gas, or dual-fuel engines. The 8406-121 is part of Woodward’s electronic governor family, offering reliable isochronous or droop speed control for single-engine applications or basic load sharing in parallel systems. Compared to the 8406-120, the 8406-121 may feature specific enhancements such as different actuator compatibility, firmware updates, or additional certifications. It is suitable for both new installations and retrofits, featuring a compact design, robust performance, and enhanced diagnostics. The 8406-121 is distinct from Woodward’s 2301D/E series (e.g., 8273-1011), 505D series (e.g., 8200-1300), Peak150 series (e.g., 8200-176), ProAct series (e.g., 8237-2595), 723PLUS series (e.g., 8270-1013), EPG systems (e.g., 8290-195), and standalone actuators (e.g., 8405-809), focusing on integrated governor control with actuation capabilities.
Technical Specifications
- The 8406-121 has the following specifications based on industry sources and Woodward documentation:
| Specification | Details |
|---|---|
| Model/Part Number | 8406-121 |
| Manufacturer | Woodward |
| Description | Electronic Governor for Engine Speed Control |
| Series | Not part of a specific named series (general electronic governor) |
| Function | Controls speed for diesel, gas, or dual-fuel engines; optional load sharing |
| Processor | Microprocessor-based (specific architecture not publicly detailed) |
| Memory | Flash: 4–8 MB (for firmware and configuration) RAM: 2–4 MB (for runtime data) |
| Display | None (configuration via PC interface or external HMI) |
| Inputs | 2 speed inputs (magnetic pickup or proximity probes) 4 analog inputs (4–20 mA or 0–5 V) 6 discrete inputs (24 VDC) |
| Outputs | 1 actuator output (integrated, 4–20 mA or 0–200 mA) 2 analog outputs (4–20 mA) 4 relay outputs (dry contact) |
| Communication Interfaces | 1 serial port (RS-232 or RS-485, Modbus RTU) CANopen (optional) |
| Control Modes | Isochronous or droop speed control; basic load sharing |
| Redundancy | Non-redundant |
| Diagnostics | Fault detection, event logging (up to 200 events), status LEDs |
| Compatibility | Woodward actuators (integrated or external, e.g., UG-8, ProAct), speed sensors, and third-party devices via standard protocols; integrates with SCADA systems |
| Power Supply | 18–32 VDC (24 VDC nominal) |
| Power Consumption | Approx. 10–20 W |
| Environmental Specifications | Operating Temperature: -40°C to +70°C (-40°F to +158°F) Storage Temperature: -40°C to +85°C (-40°F to +185°F) Relative Humidity: 5% to 95% non-condensing Vibration: MIL-STD-810 compliant Shock: MIL-STD-810 compliant |
| Enclosure | IP20 (panel-mounted, higher IP ratings with enclosures) |
| Dimensions | Approx. 200 mm (H) x 150 mm (W) x 100 mm (D) |
| Weight | Approx. 1–2 kg |
| Mounting | Panel or DIN rail |
| Certifications | CE, UL, CSA, marine certifications (e.g., DNV, ABS, configuration-dependent); ATEX Zone 2 (optional) |