Description
The Woodward EGCP-2 Digital Control 8406-121 is a microprocessor-based engine generator control package designed for automatic control, synchronization, load management, and protection of diesel and gas generator sets. It combines engine control, generator synchronization, real power (kW) load control, reactive power (kVAR) control, automatic sequencing, and protective functions into one integrated controller.
The 8406-121 model is configured with a 50–150 VAC PT voltage sensing input and is commonly used in standby power systems, industrial generator plants, marine power systems, and distributed generation applications. It supports communication functions through RS-422/RS-485 interfaces for integration with supervisory control systems.
8406-121
📋 Product Datasheet
| Parameter | Value |
|---|---|
| Brand | Woodward |
| Model | 8406-121 |
| Series | EGCP-2 Engine Generator Control Package |
| Product Name | Digital Engine Generator Control Module |
| Application | Diesel / Gas Generator Control & Management |
| Controller Type | Microprocessor-Based Digital Controller |
| Power Supply | 9–32 VDC (12/24 VDC Nominal) |
| PT Voltage Input | 50–150 VAC RMS |
| CT Current Input | 0–5 A RMS |
| Generator Frequency Range | 40–70 Hz |
| Speed Input | Magnetic Pickup 100–15,000 Hz |
| Communication Interface | RS-422 / RS-485 |
| Control Functions | Synchronizing, Load Sharing, kW & kVAR Control |
| Relay Output Rating | 10 A @ 250 VAC / 10 A @ 30 VDC |
| Display Interface | LCD Display with Keypad |
| Dimensions | Approx. 358 × 282 × 69 mm |
| Weight | Approx. 2.9 kg |
| Country of Origin | USA |
| Condition / Status | Used – Verify Physical Unit |
⚙️ Product Features
🔹 Complete Generator Control Solution – Integrates engine management and generator control functions for automated power generation systems.
🔹 Automatic Synchronization – Provides generator synchronization functions for connecting generator sets to a common electrical bus.
🔹 Real Power & Reactive Power Control – Supports kW load control and kVAR / power factor control for generator operation.
🔹 Automatic Generator Sequencing – Allows multiple generator sets to start, stop, and share operating hours according to system demand.
🔹 Engine Protection Functions – Supports monitoring functions including overspeed, oil pressure, coolant temperature, battery voltage, and start failure protection.
🔹 Generator Protection Functions – Provides over/under voltage, over/under frequency, reverse power, reverse VAR, and overcurrent protection features.
🔹 Communication Capability – RS-422/RS-485 communication allows connection with PC monitoring software and industrial control networks.
🔹 Industrial & Marine Applications – Suitable for generator systems requiring stable operation, automatic control, and centralized monitoring.
❓ Common Questions & Answers
Q1: What is the Woodward 8406-121?
A: It is an EGCP-2 digital engine generator control module used for generator automation, synchronization, load control, and protection.
Q2: What is the difference between 8406-121 and 8406-120?
A: The main difference is the generator voltage sensing input range. The 8406-121 uses a 50–150 VAC PT input, while the 8406-120 uses a 150–300 VAC PT input.
Q3: Can the EGCP-2 control multiple generators?
A: Yes. EGCP-2 controllers can be networked for multiple generator applications including load sharing and automatic sequencing.
Q4: Is the 8406-121 a PLC module?
A: No. It is a dedicated generator control and engine management controller.
Q5: What power supply does the 8406-121 require?
A: It operates from a 9–32 VDC supply, typically using 12 VDC or 24 VDC systems.
Q6: What communication ports are available?
A: The controller provides RS-422 and RS-485 communication interfaces for monitoring and system integration.
Q7: What should be checked before replacement?
A: Verify the complete part number, PT input range, generator voltage configuration, firmware revision, wiring connections, and existing EGCP-2 parameters before installation.
⭐ Recommended Woodward Models
- 8406-120 – EGCP-2 Digital Engine Generator Control (150–300 VAC PT Input)
- 8406-121 Rev.H – EGCP-2 Digital Engine Generator Control
- 8406-123 – EGCP-2 Engine Generator Control Variant
- 8440-2085 – easYgen-3500XT Generator Controller
- 8440-1800 – easYgen-3000 Series Controller
- 8273-140 – 2301D Digital Load Sharing Speed Control
- 9906-018 – 2301A Load Sharing Speed Control
- 8280-501 – 723 Digital Control
- 8280-488 – 723PLUS Digital Control
- 9907-247 – 828 Digital Control Unit
