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5461-892 - Dual High-Speed Counter Module is available in stock which ships the same day.
5461-892 - Dual High-Speed Counter Module comes in UNUSED as well as REBUILT condition.
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TECHNICAL SPECIFICATIONS:
Part Number: 5461-892
Manufacturer: Woodward
Series: NetCon / MicroNet Series
Product Type: Dual High-Speed Counter Input Module
Channel Density: 2 Independent High-Speed Counting Channels
Input Frequency Range: 0 Hz to 100 kHz
Input Sensitivity Range: 100 mVrms to 50 Vrms
Counting Resolution: 32-Bit Internal Accumulator / Frequency Counter
Dielectric Isolation Rating: 500 VDC (Field-to-Logic / Inter-Channel)
Filter Characteristics: Adjustable Low-Pass & Noise Rejection Filters
Backplane Interface: VMEbus Architecture Interface
Power Consumption: 5.2 W (Typical) / 7.0 W (Maximum)
Input Voltage Rail: +5 VDC (Supplied via VME Backplane)
Form Factor Frame Type: Single-Slot Chassis Plug-in Card
Mounting Type: Standard VME / Chassis Backplane Slot Mount
Front Panel Interface: Channel Activity & Status LED Indicators
Operating Temperature Limits: -40°C to +70°C (-40°F to +158°F)
Relative Humidity Threshold: 5% to 95% (Non-condensing)
Vibration & Shock Standard: MIL-STD-810 & IEC 60068-2-6 Compliant
Repair Time: 3–7 Days
Availability: In Stock
Weight: Approximately 1.20 kg (2.65 lbs)
Country of Origin: United States
The 5461-892 is a Dual High-Speed Counter Module designed and manufactured by Woodward. Engineered for high-accuracy rotational velocity and pulse-counting operations within NetCon and MicroNet digital control systems, it processes rapid frequency signals generated by turbine speed sensors, flowmeters, and shaft encoders. By converting high-frequency pulse trains directly into precise 32-bit digital velocity and count values before transmitting them across the VME backplane, the 5461-892 delivers sub-millisecond updates required for turbine speed governing, acceleration rate calculations, and overspeed trip logic.
HIGH-FREQUENCY SIGNAL DISCRIMINATION & PULSE FILTERING:
Equipped with two independent counter channels capable of reading frequencies up to 100 kHz, the High-Speed Counter Module evaluates low-amplitude pulse streams directly from magnetic pickups or proximity probes. Advanced signal conditioning circuitry dynamically adjusts input thresholds to filter out electrical noise, mechanical tooth ripple, and high-frequency EMI generated in harsh turbine hall environments. The optocouplers isolate external transducer wiring up to 500 VDC from core backplane logic, shielding the central processor from ground potential spikes and lightning surges.
TRANSDUCTION HEALTH AUDITING & ACCELERATION TRACKING:
The High-Speed Counter Module incorporates real-time signal validation routines that continuously monitor incoming pulse amplitude and frequency rates of change. Local front-panel indicators provide immediate channel status during loop checks and initial shaft speed calibration. If an MPU cable breaks, a sensor magnet degrades, or a signal drops out of specification during operation, the module instantly asserts a sensor fault flag across the backplane, allowing the CPU to automatically switch to a secondary speed sensor or execute a safe, controlled shutdown routine.
WHY BUY FROM WOC
World of Controls specializes in the supply, repair, and lifecycle support of critical Woodward governor and turbine control hardware worldwide. Every Woodward 5461-892 High-Speed Counter Module undergoes rigorous multi-stage bench testing, including high-frequency signal generator simulation, amplitude sensitivity checks, noise rejection filter testing, and full-load thermal burn-in on Woodward test rigs. We maintain extensive stock of UNUSED surplus and professionally REBUILT units to ensure rapid dispatch and minimize unexpected plant downtime. Backed by full warranty coverage, global express shipping, and deep technical expertise in NetCon and MicroNet architectures, WOC is your dependable partner for industrial automation spares.
What is Woodward 5461-892?
The Woodward 5461-892 is a Dual High-Speed Counter Module used in Woodward NetCon and MicroNet control systems. It reads high-frequency pulse and frequency inputs from turbine speed sensors or pulse transmitters (up to 100 kHz) and delivers accurate speed telemetry to the main governor CPU.
What types of speed sensors can be wired to the module?
The module directly supports Passive Magnetic Pickups (MPUs), active proximity probes, optical encoders, and pulse-output flowmeters.
How does the High-Speed Counter Module handle electrical noise on speed sensor lines?
It features dynamic input sensitivity hysteresis and active RC filtering designed to eliminate contact chatter, electromagnetic interference (EMI), and gear tooth harmonic distortion, ensuring clean pulse counting.
What causes a speed signal fault on the High-Speed Counter Module?
Speed signal faults are generally caused by incorrect MPU gap clearance, damaged sensor wiring, open-circuit coils, excessive electrical noise, or a drop in signal amplitude below the minimum 100 mVrms threshold.
