Fisher 57C493 ES371AMB – Regulated DC Power Supply Module | DCS Process Control Platform
Engineering Background
The Fisher 57C493 ES371AMB is a regulated DC power supply module engineered for deployment within Emerson Fisher distributed control system (DCS) architectures. Designed to deliver stable, conditioned power to field I/O modules, controllers, and communication backplanes, this unit is a critical infrastructure component in continuous process industries including oil & gas, petrochemical, pulp & paper, and power generation.
Product Positioning
As a procurement engineer sourcing replacement or spare power supply modules for an existing Fisher DCS installation, the 57C493 ES371AMB offers a direct form-fit-function replacement path. Konmask.com maintains verified inventory of this module to support both planned maintenance windows and emergency unplanned outages, minimizing process downtime.
Complete Technical Specifications
- Part Number: 57C493
- Assembly / Sub-Model: ES371AMB
- Manufacturer: Fisher Controls International (Emerson Process Management)
- Module Type: Regulated DC Power Supply
- Platform Compatibility: Fisher DCS / Emerson Process Control Systems
- Weight: 210 g (approx.)
- Condition: New surplus / Refurbished – tested and verified
- Warranty: 12-month Konmask operational warranty
- Country of Origin: USA
Proven Application Environments
- Oil & Gas upstream / midstream / downstream process control
- Petrochemical and refinery DCS power distribution racks
- Pulp & paper mill automation backplane power
- Power generation plant control room infrastructure
- Water treatment and municipal utility SCADA/DCS hybrid systems
- Pharmaceutical batch process control cabinets
Engineering Advantages
- Drop-in Replacement: Identical form factor and connector pinout to OEM specification — no rewiring or reconfiguration required.
- Stable Output Regulation: Maintains conditioned DC output under variable load conditions, protecting downstream I/O and controller modules.
- Thermal Design: Engineered for continuous duty in industrial cabinet environments with passive or forced-air cooling.
- EMI/RFI Hardening: Designed to operate in electrically noisy industrial environments without output ripple degradation.
- Long Service Life: Component-grade selection aligned with Fisher’s industrial reliability standards for 24/7 process environments.
System Architecture & Signal Flow
Within a Fisher DCS power distribution architecture, the 57C493 ES371AMB typically occupies a dedicated power supply slot in the I/O chassis or controller rack. AC mains input is rectified and regulated to the required DC bus voltage, which is then distributed via the backplane to all installed I/O modules and field termination assemblies. Redundant power supply configurations (1+1) are supported in most Fisher chassis designs — consult your system documentation for slot assignment and redundancy wiring.
Sourcing & Quality Verification
- All units sourced through authorized industrial surplus and OEM-certified channels.
- Pre-shipment functional test: DC output voltage, load regulation, ripple, and thermal performance.
- Visual inspection: PCB integrity, connector condition, label legibility, and housing integrity.
- Anti-counterfeit verification: component markings, date codes, and board revision cross-referenced against known-good references.
- Packaging: ESD-safe anti-static bag, foam-lined carton, with serialized inspection tag.
Procurement Process
- Confirm Part Number: Verify 57C493 and ES371AMB against your system BOM or existing installed unit label.
- Request Quote: Contact support@konmask.com with quantity, required delivery date, and destination port.
- Order Confirmation: Pro-forma invoice issued within 1 business day; payment via T/T, PayPal, or trade credit.
- Shipment: DHL / FedEx express worldwide; EXW Xiamen or CIF available. Lead time: 3–7 business days for in-stock units.
- Documentation: Commercial invoice, packing list, test report, and certificate of conformance provided on request.
Technical FAQ
Q: Is the 57C493 ES371AMB compatible with all Fisher DCS chassis generations?
A: Compatibility depends on your specific chassis model and firmware revision. Please provide your system model number when inquiring so our engineers can confirm interoperability.
Q: Can this module be used in a redundant power supply configuration?
A: Yes, provided your chassis supports 1+1 redundancy. Consult your Fisher system hardware manual for slot assignment and load-sharing specifications.
Q: What is the lead time for out-of-stock units?
A: Typical lead time for sourced units is 2–4 weeks. Contact us for real-time availability.
Q: Do you provide a test report with shipment?
A: Yes. A functional test report is included with every unit shipped from Konmask.com.
Q: What warranty is provided?
A: All units carry a 12-month operational warranty from date of shipment. DOA units are replaced at no charge.
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