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- Woodward
- 8441-1138
- Multi-Function Relay Module
- USA
- 200 × 160 × 65 mm
- 0.6 kg
- Xiamen, China
- New & In Stock
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- 1 Year
- 1-3 Working Days
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Product Overview
The Woodward 8441-1138 is an MFR13 Series Multi-Function Relay Module used for configurable relay-based control and switching functions in industrial control systems. It is suited to applications where several electrical signals must be monitored, isolated, or switched according to defined operating conditions.
The module can be applied in generator control, engine management, power-system automation, and auxiliary control circuits where relay outputs are used to interface control logic with external electrical equipment. Its multi-function configuration allows the same module family to support different control and protection requirements depending on the system setup.
In a typical control panel, the relay module receives control or status information from the associated automation system and operates the corresponding relay circuits. The relay contacts can then be used to command auxiliary equipment, transmit status signals, or interface with devices that require electrical isolation between control and field circuits.
The MFR13 Series is particularly useful where relay-based signal handling needs to be integrated into a larger Woodward control architecture. It can be installed as part of generator, engine, switchgear, and industrial power-control systems where discrete signal exchange is required.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | 8441-1138 |
| Product Family | MFR13 Series |
| Product Type | Multi-Function Relay Module |
| Primary Function | Relay-based control and signal switching |
| System Role | Discrete signal interface |
| Application | Industrial control, generator, and power-system applications |
| Dimensions | 200 × 160 × 65 mm |
| Weight | 0.6 kg |
Product Features
- MFR13 Series Multi-Function Relay Module for industrial control applications.
- Supports relay-based switching and discrete signal interface functions.
- Suitable for control, status indication, and auxiliary switching circuits.
- Can interface control-system signals with external electrical equipment.
- Applicable to generator and engine control architectures.
- Suitable for integration into industrial power and switchgear control panels.
- Supports flexible relay functionality according to the configured control application.
Working Principle
The module operates by receiving discrete control or status signals from the associated control system and using those signals to operate the corresponding relay circuits. Depending on the application, the relay contacts can be used to energize external equipment or transmit a status condition to another control circuit.
When a control condition is detected, the relevant relay changes state. The resulting contact condition is then used by connected equipment such as contactors, alarms, shutdown circuits, indication devices, or auxiliary controllers.
Control System → 8441-1138 MFR13 Relay Module → Relay Contacts → Auxiliary Equipment / Indication / Control Circuit
The relay interface also separates the controller-side signal path from the external switching circuit, making the module useful for applications where discrete electrical interfaces must be coordinated within a larger control system.
Role in an Industrial Generator Control Architecture
The 8441-1138 can serve as a discrete relay interface between a Woodward control system and external generator or auxiliary equipment. Its position in the architecture allows controller commands and equipment status signals to be transferred through relay contacts.
Architecture chain
Woodward Controller → MFR13 Relay Module → Relay Interface → Generator / Switchgear / Auxiliary Equipment
| System Element | Function |
|---|---|
| Woodward Controller | Executes control, monitoring, and protection logic |
| 8441-1138 | Provides multi-function relay switching and discrete signal interfacing |
| Relay Contacts | Transfer switching or status signals |
| Switchgear | Performs electrical switching and protection functions |
| Generator / Engine Equipment | Performs the primary power-generation function |
| Alarm / Indication System | Reports operating and fault conditions |
Industrial Applications
| Application | Typical Use |
|---|---|
| Generator Control | Relay interface for generator operating and status signals |
| Engine Control Systems | Switching of auxiliary engine-control circuits |
| Power Generation | Interface between controllers and electrical equipment |
| Switchgear Control | Discrete control and status signal exchange |
| Industrial Power Systems | Auxiliary relay logic and equipment coordination |
| Control Panels | Centralized relay-based signal interfacing |
Installation and Maintenance
- Confirm the 8441-1138 relay configuration matches the intended control application before installation.
- Verify the associated Woodward controller and external equipment requirements.
- Check the control-panel wiring against the approved electrical schematic.
- Confirm relay contact assignments before connecting field circuits.
- Separate control wiring from power wiring where required by the panel design.
- Ensure all terminal connections are correctly identified and securely tightened.
- Verify the external load connected to each relay contact is suitable for the configured circuit.
- Apply control power and check the relay operating state during commissioning.
- Test each required relay function using the actual control sequence or an approved commissioning procedure.
- Inspect terminals and wiring if intermittent relay operation occurs.
- Check for contact wear or abnormal switching behavior in applications with frequent relay operation.
- After maintenance or replacement, verify all relay outputs, status signals, and connected auxiliary circuits before returning the equipment to service.
Related Components
| Component | Function |
|---|---|
| Woodward Controller | Provides control and logic functions |
| MFR13 Series Modules | Provides relay-based control and signal interface functions |
| Generator Control Equipment | Manages generator operating conditions |
| Engine Control System | Coordinates engine operation and auxiliary functions |
| Switchgear | Performs electrical switching and protection |
| Contactors | Switch higher-power electrical loads |
| Alarm Modules | Provides equipment and fault indication |
| Terminal Blocks | Provides field wiring and circuit distribution |
Recommended Related Models
| Model / Product Family | Product Type | Typical Application |
|---|---|---|
| Woodward MFR13 Series | Multi-Function Relay Module | Generator and industrial relay control |
| Woodward MFR Series | Multi-Function Relay Module | Discrete control and protection interfaces |
| Woodward Generator Control Modules | Generator Controller | Generator monitoring and control |
| Woodward Engine Control Modules | Engine Controller | Engine operating control |
| Woodward Protection Modules | Protection Module | Equipment protection and shutdown functions |
| Woodward Relay Interface Modules | Relay Module | Electrical signal switching and isolation |
| Woodward Control Panel Modules | Control Module | Panel-level automation and equipment control |
| Woodward Switchgear Interface Modules | Interface Module | Switchgear control and status signals |
Key Advantages
- Provides a dedicated relay interface for industrial control systems.
- Supports multiple discrete switching functions within the MFR13 Series.
- Suitable for generator, engine, and power-system applications.
- Simplifies the interface between electronic controllers and external relay circuits.
- Useful for auxiliary control, alarm, status, and switching functions.
- Integrates naturally into Woodward-based control architectures.
Technical FAQs
How should relay contacts be evaluated when connecting the 8441-1138 to external equipment?
The contact function and the electrical characteristics of the connected circuit should be checked against the applicable system requirements. Particular attention should be given to the type of load, switching frequency, and circuit protection before commissioning.
What symptoms can indicate a problem in the relay interface rather than the main controller?
If the controller generates the expected command but the connected external device does not respond, the relay circuit, wiring, terminal connections, or external load should be checked. Comparing the controller command with the actual relay state can help isolate the fault location.
Why is relay contact wiring important in generator control applications?
Generator systems often use discrete signals for start, stop, alarm, shutdown, breaker control, and equipment status. Incorrect contact assignment can therefore produce an unexpected control response even when the controller program itself is operating correctly.
What should be verified after replacing an MFR13 relay module?
The replacement should be checked against the original configuration and wiring documentation. Each required relay function should then be tested individually, followed by a functional test of the complete generator, engine, switchgear, or auxiliary control sequence.