PRODUCT INFORMATION
Product Overview
The Woodward 8440-1857 is an easYgen genset control and protection unit. It operates on a 12/24 Vdc battery power supply. The unit lacks an internal isolated power supply. It draws power directly from a battery and charging alternator setup. This module manages generator set control and electrical protection. The durable plastic housing protects internal circuitry in industrial installations.
Electrical connection to the charging alternator utilizes dedicated terminals. Terminal A is labeled as terminal 53. Terminal B is labeled as terminal 52. Battery positive connects to terminal A across an 8 to 40 Vdc range. The auxiliary excitation D+ line connects to terminal B. The unit withstands overvoltage conditions up to 80 Vdc for up to two minutes.
TECHNICAL DATA
Technical Specifications
| Parameter | Specification |
|---|
| Housing | Plastic |
|---|
| Humidity | 95%, non condensating |
|---|
| Overvoltage (≤ 2 min) | 80 Vdc |
|---|
| Power Supply | 12/24 Vdc |
|---|
| RMS value vibration | 1.04 Grms |
|---|
| Weight | approx. 800 g |
|---|
TECHNICAL INFORMATION
Features
- Operates with 12/24 Vdc systems and battery charging alternators.
- Includes non-isolated direct power connections for alternator circuits.
- Withstands temporary overvoltage events up to 80 Vdc for two minutes.
- Provides dedicated D+ auxiliary excitation input on terminal 52.
- Housed in a lightweight plastic enclosure weighing approximately 800 grams.
- Resists mechanical vibration stresses rated up to 1.04 Grms.
- Tolerates relative humidity levels up to 95 percent non-condensing.
TECHNICAL INFORMATION
Applications
- Diesel and gas generator set automation and electrical protection.
- Engine generator monitoring systems requiring battery alternator power.
TECHNICAL INFORMATION
Connections / Interfaces
- Terminal 53 represents terminal A for battery positive connection.
- Terminal A accepts direct battery voltage from 8 to 40 Vdc.
- Terminal 52 represents terminal B for alternator charging circuits.
- Terminal B interfaces with the D+ auxiliary excitation output.
TECHNICAL INFORMATION
Installation Guidelines
- Mount the controller securely within an electrical panel enclosure.
- Ensure operating environment does not exceed 95 percent non-condensing humidity.
- Verify vibration levels remain within the 1.04 Grms operating specification.
- Connect charging alternator excitation lines according to terminal designations.
TECHNICAL INFORMATION
Configuration Guidelines
- Configure DC input parameters for 12 Vdc or 24 Vdc system operation.
- Confirm battery input voltage stays within the 8 to 40 Vdc operating limits.
PART VERIFICATION
Before You Order
Industrial automation parts can share similar model names, suffixes and revisions. Confirm the complete manufacturer Part Number before purchase.
01Check Part NumberMatch the complete ordering code on the existing unit.
02Confirm RevisionCheck suffix, hardware or firmware when applicable.
03Send a Label PhotoWe can review a clear label photo when identification is uncertain.
ORDERING PROCESS
From RFQ to Dispatch
1Submit Part Number2Verify Product Identity3Confirm Stock & Condition4Issue Quotation5Dispatch & Tracking
PRODUCT FAQ
Frequently Asked Questions
What power source does the Woodward 8440-1857 require?
The unit requires a 12/24 Vdc power source from a battery or charging alternator.
Does the 8440-1857 have an isolated internal power supply?
No, the unit has no internal isolated power supply and connects directly to the battery circuit.
Which terminals connect to the charging alternator?
Terminals 52 and 53 connect to the charging alternator circuit.
What is the maximum overvoltage rating for this control unit?
The unit withstands up to 80 Vdc overvoltage for durations of two minutes or less.
