Woodward 1751-6091 16-Channel Relay Output Module

Product Overview

The Woodward 1751-6091 relay output module is an industrial control interface engineered for use with Woodward digital turbine governors, most notably the 505E steam turbine control platform. It translates low-level digital control signals into dependable relay outputs, enabling direct actuation of external field equipment in turbine and generator systems.

Designed for continuous operation in demanding power-generation environments, this module provides high channel density, electrical isolation, and predictable switching behavior required for critical turbine functions.

Functional Description

The 1751-6091 operates as a discrete relay interface between the governor control logic and downstream devices such as solenoids, valves, interlocks, alarms, and auxiliary control circuits. Each relay channel functions independently, allowing simultaneous control of multiple turbine subsystems without signal interference.

The module is commonly deployed in steam turbine configurations including admission, extraction, and combined extraction/admission systems, where deterministic relay operation is essential for safe and stable turbine control.

Technical Specifications

General

• Model: 1751-6091
• Manufacturer: Woodward
• Module Type: Multi-channel relay output interface
• Intended System: Woodward 505E digital governor and compatible platforms

Relay & Control Characteristics

• Number of Outputs: 16 isolated relay channels
• Output Function: Digital signal conversion to relay switching
• Typical Use: Control of external field devices and turbine auxiliaries
• Contact Type: Industrial electromechanical relays
• Switching Logic: Governed by digital output commands from the controller

Electrical & System Integration

• Designed for reliable interfacing with turbine governor I/O architectures
• Suitable for continuous-duty operation in critical control loops
• Provides electrical isolation between control electronics and field wiring

Environmental & Safety Ratings

• Enclosure Protection: IP65, resistant to dust ingress and water spray
• Functional Safety: SIL 2 capable when integrated within approved systems

Mechanical & Installation

• Mounting: Panel or rack installation depending on system layout
• Construction: Rugged industrial housing for power plant environments
• Compatibility: Commonly paired with hydraulic actuator-based turbine systems

Typical Applications

• Steam turbine governor output expansion
• Generator auxiliary control and sequencing
• Valve, solenoid, and relay-driven turbine equipment
• Power plant control panels and turbine skids
• Retrofit or replacement of legacy Woodward relay interfaces

Frequently Asked Questions

Q: Is the 1751-6091 only compatible with the Woodward 505E? A: While it is most commonly used with the 505E digital governor, it may also be compatible with other Woodward control systems that support equivalent relay output interfacing.

Q: Can this module be used in safety-related applications? A: Yes. When properly integrated and validated within a certified control architecture, the 1751-6091 supports SIL 2 safety requirements.

Q: What type of field devices can be controlled? A: Typical devices include solenoid valves, relay coils, alarms, interposing relays, and other discrete turbine or generator control components.