WOODWARD 5501-367

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WOODWARD 5501-367: MicroNet Simplex LV Discrete Field Termination Module (FTM)

The WOODWARD 5501-367 isn’t a control module itself, but it’s a vital piece of the puzzle for any Woodward MicroNet system. Think of it as the robust bridge that connects your plant’s field wiring—sensors, switches, solenoids—to the sensitive electronics of the main MicroNet control modules.

Product Overview

This module is a Field Termination Module (FTM) specifically designed for low voltage (LV) discrete (on/off) signals within simplex (non-redundant) Woodward MicroNet systems. It provides a secure, organized, and protected interface for both digital inputs and outputs.

• Product Type: Field Termination Module (FTM)
• Manufacturer: Woodward
• Series: MicroNet Simplex LV Discrete
• Function: Connects field wiring for discrete (digital) inputs and outputs to the MicroNet control modules.

Detailed Description

In an industrial environment, the raw signals from the field can be noisy and carry electrical disturbances. The 5501-367 is built to handle this. It typically features robust screw terminals where technicians can directly connect field cables for devices like limit switches, pressure switches, operator buttons, and control solenoids or relays. This eliminates the need to wire directly into the more delicate control module, simplifying installation and maintenance.

Key benefits of using this FTM include:

• Secure & Organized Wiring: The screw terminals provide a solid connection point, and the FTM helps keep field wiring neat and clearly labeled, which is a huge time-saver during troubleshooting.
• Signal Protection: While the primary processing happens on the paired MicroNet I/O module, the FTM often includes passive components like fuses or transient voltage suppressors. These offer a first line of defense against electrical surges and noise, protecting your control system.
• Electrical Isolation: Crucially, FTMs typically provide electrical isolation. This means they prevent ground loops and protect the sensitive internal components of the MicroNet system from electrical faults originating in the field.
• Simplex Design: The “Simplex” designation indicates it’s for standard, single-channel control applications, not for Triple Modular Redundancy (TMR) systems that require highly redundant hardware.
• Low Voltage Discrete: The “LV Discrete” part means it handles lower voltage on/off signals, typically up to 24 VDC.

The 5501-367 typically connects to a corresponding MicroNet digital I/O module (such as the 5501-365 or similar) via a high-density cable. This pairing allows the control system to accurately read the status of field devices and send precise on/off commands to actuators. Depending on the specific MicroNet discrete module it pairs with, this FTM can accommodate a varying number of channels, with common configurations offering either 16 digital inputs and 16 digital outputs or 4 digital inputs and 4 digital outputs, often with capabilities to handle up to 2A at 24VDC per output channel.

Technical Specifications (General)

Typical Applications

The WOODWARD 5501-367 is indispensable for reliable digital I/O in a wide array of industrial applications using Woodward MicroNet control systems, including:

• Turbine & Engine Control: Interfacing with permissive signals, safety limits, and control solenoids for functions like fuel shutoff or start-up sequencing.
• Compressor Control: Connecting to valve position switches, motor running status, and controlling auxiliary functions.
• General Process Control: Providing reliable field connections for monitoring the status of pumps, fans, and safety interlocks.