EMERSON 9199-00002 A6120

Description

Product Description

The EMERSON 9199-00002 A6120 is a high-reliability, modular DC power supply module designed for industrial control and automation systems, most notably within Emerson’s own control platforms such as the PACSystems™ RX3i. This component functions as a critical subsystem, converting an input AC line voltage into one or more stabilized, isolated, and filtered DC output voltages to power the central processor, I/O modules, and other electronics within a PLC rack or control chassis. The primary function of the EMERSON 9199-00002 A6120 is to ensure the integrity and availability of the entire control system by providing clean, regulated, and protected power, immune to fluctuations and transients from the plant mains. Its modular and often hot-swappable design emphasizes system uptime. Integrating this power supply is a foundational step in building a robust control station where consistent performance is non-negotiable.

Technical Parameters and Features

• Device Type: Modular AC-to-DC Power Supply Module for control systems.
• Input Voltage Range: Typically accepts a wide-range input, such as 85-264 VAC (47-63 Hz) or a high-voltage DC input, allowing for global use without manual taps.
• Output Specifications:
  • Output Voltage: Commonly provides a primary +5 VDC logic rail and often auxiliary rails like ±12 VDC or +24 VDC for bus communication and field I/O power.
  • Output Current/Power: The “A6120” suffix likely denotes a specific current rating (e.g., 12A on the 5V rail) or total power output (e.g., 60W). The exact capacity is crucial for system sizing.
• Protection & Safety Features:
  • Overcurrent/Short-Circuit Protection: Electronic current limiting with auto-recovery or latch-off.
  • Overvoltage Protection (OVP): On critical outputs to protect downstream modules.
  • Thermal Protection: Automatic shutdown in case of overtemperature.
• Efficiency: High switching-mode efficiency, reducing heat generation and energy loss.
• Cooling: May include an internal fan or rely on conductive cooling via a heatsink, depending on the power rating.
• Form Factor & Mounting: Designed as a plug-in module for a specific backplane or chassis slot (e.g., in an RX3i Universal Backplane).
• Hot-Swap Capability: Often designed for hot-swapping in redundant configurations, allowing replacement without system shutdown.
• Status Indication: LED indicators for AC Power OK, DC Output OK, and Fault conditions.

Advantages and Key Features

• System-Optimized Design: The EMERSON 9199-00002 A6120 is engineered to meet the specific voltage, current, and timing requirements of its companion control modules, ensuring compatibility and stable operation under all load conditions.
• High Availability Features: Designed with features like hot-swap support and N+1 redundancy capability, this power supply module directly contributes to maximizing the mean time between failures (MTBF) and minimizing the mean time to repair (MTTR) of the control system.
• Superior Noise Immunity and Regulation: Provides excellent line and load regulation along with high noise rejection, creating a stable “quiet island” of power for sensitive digital and analog circuits, which is essential in electrically noisy industrial environments.
• Compact and Integrated: Consolidates the power conversion for an entire rack of modules into a single, serviceable unit, saving panel space and simplifying the overall system architecture compared to using multiple external supplies.
• Proven Reliability from an Automation Leader: As an Emerson OEM component, it benefits from rigorous design validation and testing for 24/7 industrial operation, offering peace of mind for critical applications.

Application Case Studies in Various Fields

• Water/Wastewater Treatment SCADA: Powers an Emerson RX3i PLC rack in a remote pumping station. The wide input range of the 9199-00002 A6120 tolerates unstable grid power, and its clean output ensures reliable operation of analog input modules measuring flow and pressure.
• Factory Automation Cell: Serves as the primary power source for a machine controller managing robotic welders. Its robust design withstands the electrical noise generated by large servo drives and welding transformers on the same AC branch.
• Oil & Gas Compressor Control Skid: Installed in a hardened enclosure on a pipeline, the power supply must operate reliably across a wide temperature range and provide stable power to the control system that manages anti-surge and safety shutdown logic.
• Power Generation Turbine Auxiliary Control: Used in a backup or BOP (Balance of Plant) control system where high availability is required. In a redundant configuration, a failed A6120 module can be replaced without interrupting control functions.

Comparison with Competing Products

When compared to generic DIN-rail power supplies or power modules from other PLC vendors, the EMERSON 9199-00002 A6120 is distinguished by its system integration:

1. Guaranteed Compatibility vs. Generic Parts: A generic 24V/5V supply may physically fit and work initially, but it lacks the specific sequencing, monitoring, and backplane interfacing designed for the host system. The OEM 9199-00002 A6120 guarantees correct start-up behavior and diagnostic reporting.
2. Diagnostic Integration: The status of this power supply is typically monitored by the controller via the backplane. A fault can generate a specific system alarm. A generic supply offers only a local LED, requiring manual inspection.
3. Redundancy Management: In systems designed for N+1 redundancy, the EMERSON power supplies include circuitry for current sharing and fault isolation. Achieving true hot-swap redundancy with generic supplies requires additional, complex external circuitry.

Selection Advice and Important Notes

• Perform a Detailed Load Calculation: Before selection, calculate the total current/power consumption of all modules intended for the rack (CPU, I/O, communication). Ensure the A6120‘s rated capacity exceeds this total with a safety margin (typically 20-30%) to ensure longevity and handle future expansion.
• Verify Exact System Compatibility: This part number is specific to certain Emerson control chassis. Crucially confirm that the 9199-00002 A6120 is listed as compatible with your exact chassis model (e.g., IC693CHSxxx) and can physically and electrically interface with its backplane.
• Plan for Redundancy if Critical: For applications where a power supply failure would cause an unacceptable process interruption, design the system with N+1 redundant power supplies from the start.
• Ensure Adequate Cooling and Derating: Adhere to the specified installation orientation and clearances. Power supplies derate at high ambient temperatures; ensure the cabinet temperature is within the module’s specified operating range.
• Source from Authorized Channels: To avoid counterfeit or refurbished parts that may not meet original specifications, procure the EMERSON 9199-00002 A6120 module from Emerson or authorized distributors.

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