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TECHNICAL SPECIFICATIONS:
Part Number: 5441-689
Manufacturer: Woodward
Series: MicroNet / MicroNet Plus Series
Product Type: PLC Relay Interface Module
Relay Contacts: 5 Amp Rated
Channels: 16 Independent Relay Channels
Output Type: Form C (SPDT) Relay Contacts
Channel Isolation: Optical and Galvanic Isolation
Mounting Type: Chassis / Rack Mounted (Single-Slot VME Form Factor)
Operating Temperature Limits: -40°C to +70°C (-40°F to +158°F)
Storage Temperature Range: -40°C to +85°C (-40°F to +185°F)
Relative Humidity Threshold: 5% to 95% (Non-condensing)
Repair Time: 3–7 Days
Availability: In Stock
Weight: Approximately 1.40 kg (3.08 lbs)
Country of Origin: United States
The 5441-689 is a PLC Relay Module designed and manufactured by Woodward for integration within MicroNet and MicroNet Plus control platforms. Functioning as an isolated, high-density switching interface, it bridges the gap between the control rack's low-voltage digital backplane and external field-side Programmable Logic Controllers (PLCs), trip loops, or auxiliary plant equipment. By translating software-driven output logic into high-capacity physical relay actions, the Relay Module allows central processing units to control high-current field loads, solenoid valves, motor starters, and plant alarm interlocks without exposing sensitive backplane logic to raw external voltages.
DENSE ISOLATED SWITCHING & SIGNAL BUFFERING
Featuring 16 independent relay output channels, the Relay Module maximizes panel space efficiency while maintaining strict electrical separation between system logic and field wiring. Each channel incorporates high-grade galvanic and optical isolation, serving as a physical buffer that blocks destructive ground loops, voltage transients, and high-frequency electrical noise from penetrating the central control chassis.
REAL-TIME DIAGNOSTICS & SYSTEM RELIABILITY
The Module is built for continuous operation in demanding power generation and industrial processing environments. Front-panel LED status indicators provide visual feedback for each of the 16 relay channels, allowing maintenance personnel to quickly verify contact states during routine checks or troubleshooting. Onboard suppression components protect contact points against inductive arcing, extending hardware lifespan under heavy switching cycles.
WHY BUY FROM WOC
World of Controls specializes in critical parts lifecycle management and support for legacy and active Woodward turbine control systems. Every PLC Relay Module undergoes comprehensive point-by-point contact resistance checks, timing functional tests, and high-potential insulation verification on active Woodward test rigs. We maintain ready-to-ship stock to eliminate plant downtime, backed by comprehensive warranties and worldwide express shipping.
What is Woodward 5441-689?
The 5441-689 is a 16-channel PLC Relay Module designed by Woodward for MicroNet series controllers. It provides isolated Form C relay switching to safely interface system processing logic with external PLCs, actuators, and alarm circuits.
How does the Relay Module protect the main MicroNet CPU?
The module utilizes optoelectronic and galvanic isolation barriers between its backplane bus connector and the field-side relay contacts. This prevents field voltage surges, short circuits, or ground spikes from reaching the core processing bus.
What troubleshooting step should be taken if an output channel on the Module fails to actuate field equipment?
First, check the corresponding front-panel status LED for that channel. If the LED illuminates but the external device does not respond, verify field power supply continuity and check the screw-terminal connections on the mating field terminal module. If the LED does not illuminate when triggered by the system software, verify backplane bus communications or reseat the module inside the chassis.
What type of relay contacts are used in the Woodward 5441-689?
The module uses Form C (SPDT) relay contacts, providing normally open (NO), normally closed (NC), and common (COM) switching connections for flexible field device integration.
What fail-safe behavior occurs if backplane communication drops?
An integrated hardware watchdog timer monitors CPU heartbeats; if communication stalls, all 16 relay channels automatically de-energize to return contacts to their unpowered default states.
