Harland Simon H4890P1296 24V DC Industrial Power Module

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The Harland Simon H4890P1296 is a ruggedized 24V DC rectifier module specifically engineered for mission-critical Uninterruptible Power Supply (UPS) environments. Found extensively in offshore platforms, railway signaling centers, and power utility control rooms, this module provides the clean, ripple-free DC bus voltage required to both power sensitive electronic controls and maintain battery bank health. Its modular “plug-in” design allows for N+1 redundancy configurations, ensuring continuous system operation even during a single-unit failure.

From a strategic procurement perspective, the H4890P1296 is a “Life-Extension” component. As Harland Simon systems age, original factory support for the H4890 series can be limited, often leading to suggestions for expensive, full-system upgrades. Sourcing this module as New Surplus is a sophisticated supply-chain tactic; it secures an unused, factory-spec unit that has not suffered the electrolytic capacitor aging common in refurbished electronics. This “insurance policy” stock prevents the massive Total Cost of Ownership (TCO) spikes associated with emergency system-wide overhauls forced by a single failed power module.

H4890P1296

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

• Verify Rating: Confirm the 24V DC output matches your specific battery float or load requirements.
• Safety: Isolate the AC input feed to the shelf and ensure the DC bus is in a safe maintenance state.
• ESD Protocol: Use a grounded anti-static wrist strap to protect the module’s internal control logic.

Stage 2: Removal

• Isolation: Power down the specific slot if the rack does not support live-swapping.
• Visual Audit: Inspect the rear backplane connectors for any signs of arcing or carbon deposits from the previous failed unit.
• Extraction: Carefully slide the H4890P1296 out of its guide rails, supporting the weight to prevent connector pin damage.

Stage 3: Installation (Clone & Seat)

• Configuration Check: Inspect the H4890P1296 for any internal jumpers or DIP switches (e.g., for 110V vs 230V AC input) and match them exactly to the unit being replaced.
• Seating: Align the module with the chassis guides and press firmly until the rear DIN connectors are fully mated.
• Securing: Tighten the front-panel retention screws to ensure a solid mechanical and electrical ground.

Stage 4: Power-On & Testing

• Initial Start: Apply AC power and verify the “DC OK” or status LEDs illuminate according to the H4890 system manual.
• Voltage Audit: Measure the output at the system test points to ensure the 24V DC is within the \pm 1\% tolerance.
• Load Sharing: If operating in parallel with other modules, verify the current is being shared correctly via the system controller.

Firmware/Software Versions & Upgrade Notes

The H4890P1296 is a hardware-driven rectifier; however, its alarm and monitoring signals interface with a centralized H4890 System Controller.

Compatibility Note: When installing a New Surplus module, verify that any analog signaling (such as “Power Fail” or “Low Voltage” alarms) correctly interfaces with your existing supervisory system. If the module uses a specific communication bus for telemetry, ensure the address jumpers (if present) are mirrored from the old unit. No software drivers are required, but a full system re-test of the alarm thresholds is recommended following hardware replacement to ensure the new module is correctly polled by the controller.

Frequently Asked Questions (FAQ)

• Is this compatible with UPSL (Uninterruptible Power Supplies Ltd) hardware?

  Yes, Harland Simon and UPSL hardware share significant design overlaps in the H4890 series. The H4890P1296 is a standard replacement for many of these legacy industrial systems.

• Why should I choose New Surplus over a refurbished unit?

  Power electronics rely on electrolytic capacitors which have a finite shelf life. A New Surplus unit has zero operational hours, meaning the internal components haven’t been subjected to the heat of 24/7 service, providing a much higher MTBF (Mean Time Between Failures) than refurbished alternatives.

• Does this unit support battery charging?

  Yes, the H4890P1296 is designed to operate as a float charger and power supply, maintaining lead-acid or NiCad battery banks while simultaneously powering the DC load.

• What is the difference between this and other H4890 modules?

  The P1296 suffix often denotes a specific revision or output current capability. Always cross-reference the physical dimensions and connector pinouts with your existing inventory to ensure a 1:1 match.

• What is the warranty period?

  We offer a 1-year replacement warranty on this New Surplus module, ensuring it performs to original Harland Simon factory specifications.