Part Number: 5461-117
Product type: Power Supply - 301
Repair: 3-7 Day
Availability: In Stock
Country of Manufacture: United States (USA)
5461-117 is a Power Supply - 301 developed by Woodward. The power supply chassis employs redundant power supplies. A motherboard located on the back of the power supply chassis allows the two power supplies to form a redundant power system, providing six separately regulated 24 Vdc, 6 A outputs to the control. Power supplies play a critical role in ensuring the reliable operation of various electronic and electrical systems. However, to ensure safety during installation and servicing, it's essential to provide a means for disconnecting input power to each main power supply. This precautionary measure is particularly important because power supplies are typically not equipped with input power switches.
Safety and Maintenance Considerations
- Absence of Input Power Switches: Power supplies are designed primarily to provide a stable and consistent source of electrical power to the devices they serve. Consequently, they often lack built-in input power switches. This absence is deliberate, as it prevents accidental power interruptions that could disrupt sensitive equipment.
- The Need for Disconnecting Means: In situations where maintenance, repair, or installation work is required on the power supply unit or the equipment it powers, a reliable means of disconnecting input power is essential. This ensures the safety of personnel working on the system.
Options for Disconnecting Input Power
- Circuit Breaker: One commonly used option for disconnecting input power is the installation of a circuit breaker that meets the specified requirements. Circuit breakers are designed to interrupt electrical currents when necessary, acting as a protective switch. They are a dependable choice for disconnecting power safely during maintenance or emergencies.
- Separate Disconnect Switch: Another viable option is to install a separate disconnect switch. This switch allows for the manual interruption of input power to the main power supply. It provides a straightforward and direct method for isolating the power supply from the electrical source.
Ensuring Compliance and Safety
- Compliance with Electrical Codes: When implementing a means of disconnecting input power, it is crucial to adhere to electrical codes and regulations relevant to your jurisdiction. These codes often specify the type, rating, and installation requirements for disconnecting devices.
- Labeling and Documentation: Properly labeling and documenting the location and function of the disconnecting means is essential for safety and maintenance. This ensures that personnel can quickly and easily identify and operate the disconnecting device when needed.
- Training and Procedures: Ensure that personnel responsible for maintenance and servicing are trained on the proper procedures for disconnecting input power safely. Emphasize the importance of following established safety protocols to minimize risks.
- When redundant power supplies are in use, current sharing circuitry balances the load to reduce heat and improve power supply reliability. If one of the power supplies fails, this feature allows for the power supplies to be replaced while the control is still running. Each main power supply has four LEDs that indicate the health of the power supply (OK, Input Fault, Overtemperature, and Power Supply Fault). Connections to the main power supply are made via terminals on the front of the power supplies. The power supply chassis is linked to the control chassis via a 50-pin ribbon cable.
- The ribbon cable connects to a connector on the TMR Main Chassis's back underside. There are connectors beneath the A and C Kernels that can be used in either direction.
- The cable connects to the Power Supply Chassis near the back of the upper side of the Chassis. Because the Power Supply Ribbon cable is only one foot long, the TMR PS Chassis must be placed directly beneath the A or C Kernels of the TMR Main Chassis.
- This equipment has been specifically designed and certified for operation exclusively in non-hazardous locations or in Class I, Division 2 environments where there is a potential presence of flammable gases, vapors, liquids, or combustible dust.
- To ensure safety and compliance, it is imperative that all wiring is installed in strict accordance with the wiring methods defined for Class I, Division 2 locations. Additionally, all wiring and installation procedures must align with the directives and regulations established by the authority having jurisdiction over the specific location or facility.
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Frequently Asked Questions
What is 5461-117?
It is Power Supply - 301 developed by Woodward.
What are the output specifications?
The power supply chassis provides six separately regulated 24 Vdc outputs. Each output can deliver up to 6 A of current, ensuring sufficient power for the connected control system.
How can a failed power supply be replaced without interrupting the control system?
In the event of a power supply failure, the redundant design allows for easy replacement without interrupting the control system's operation. The functioning power supply continues to power the system while the faulty one is being replaced.
How are the power supplies connected in the chassis?
The connections to the main power supplies are made via terminals located on the front of the power supply units. These terminals provide a convenient interface for connecting power input and output cables.
How is the ps chassis linked to the control chassis?
The power supply chassis is connected to the control chassis through a 50-pin ribbon cable. The ribbon cable is connected to a specific connector on the TMR (Triple Modular Redundant) Main Chassis's back underside. The cable can be attached to connectors beneath the A and C Kernels in either direction.