5461-331 - 34-channel MicroNet Low-Level Analog Input Module

TECHNICAL SPECIFICATIONS:

Part Number: 5461-331
Manufacturer: Woodward
Series: MicroNet / MicroNet Plus
Module Type: Low-Level Analog Input (LLAI)
Number of Channels: 34 Channels
Input Range: -16 to +100 mV
Resolution: 16-Bit
Accuracy: 0.1% of full scale at 25°C
Scan Rate: 5 ms (for all 34 channels)
Isolation: 500 Vdc
Operating Temp: -30 °C to +65 °C
Availability: In Stock
Origin: United States

FUNCTIONAL DESCRIPTION:

The 5461-331 is a high-density 34-Channel Low-Level Analog Input Module designed specifically for the Woodward MicroNet control platform. It serves as a precision interface for low-voltage transducers, primarily monitoring millivolt signals from thermocouples. By translating these sensitive analog inputs into digital data, the module enables the MicroNet system to manage critical temperature-sensitive processes, such as turbine exhaust gas temperature (EGT) analysis, combustion monitoring, and overall thermal protection.

HIGH-DENSITY PRECISION MONITORING

With 34 independent channels, this module provides exceptional input density, allowing the control system to track a vast array of temperature points while occupying only a single chassis slot. It supports a wide range of thermocouple types (J, K, T, E, R, S, B, and N) and other millivolt-range signals. The 16-bit resolution ensures that even minute thermal fluctuations are captured with the precision required for high-performance industrial governors.

SIGNAL INTEGRITY AND PROTECTION

To ensure reliable operation in electrically noisy industrial environments, the 5461-331 features 500 Vdc of galvanic isolation. This protective barrier shields the internal MicroNet backplane from potential ground loops and electrical transients originating at the sensor location. Additionally, the rapid 5 ms scan rate ensures that all 34 channels are updated frequently, providing real-time data for fast-acting control loops and safety interlocks.

SYSTEM DIAGNOSTICS AND COLD JUNCTION COMPENSATION

The module is fully integrated into the MicroNet system’s diagnostic architecture, continuously monitoring the health of its internal circuitry and analog-to-digital converters (ADCs). When paired with the appropriate Field Terminal Block (FTB), the module utilizes Cold Junction Compensation (CJC) to maintain measurement accuracy across varying ambient temperatures at the termination point. This self-monitoring capability is vital for the high-integrity standards of power generation and mechanical drive applications.

WHY BUY FROM WOC:

World of Controls supports the continuous reliability of your Woodward infrastructure by providing the 5461-331 in both UNUSED and REBUILT conditions. Every module undergoes comprehensive loop testing on specialized MicroNet test benches to verify the calibration and isolation performance of all 34 channels. Backed by our global inventory and 24/7 technical support, WOC is your trusted partner for maintaining high-integrity Woodward hardware during plant upgrades or emergency outages.

FREQUENTLY ASKED QUESTIONS:

What is the Woodward 5461-331?

The 5461-331 is a 34-channel Low-Level Analog Input (LLAI) module for the MicroNet and MicroNet Plus systems. It is primarily used to monitor thermocouples and other sensors that output low-voltage millivolt signals.

What types of sensors are compatible with this module?

It is designed to interface with standard thermocouples (including Types J, K, T, E, R, S, B, and N) and other millivolt-range DC sources within the -16 to +100 mV range.

How does the module ensure accurate temperature readings?

The module uses 16-bit resolution for high precision and relies on Cold Junction Compensation (CJC) provided by the associated Field Terminal Block to account for temperature variations at the wiring terminals.