GE 8920-PS-DC PAC8000 IS DC Power Supply Module

Description

Key Technical Specifications

These specifications are based on the manufacturer’s published documentation for the PAC8000 IS power supply family.

Product Introduction & Supply Chain Strategy

The GE 8920-PS-DC is an intrinsically safe DC power supply module developed for the PAC8000 SafetyNet distributed I/O platform. It converts a nominal 24 VDC input into a regulated 12 VDC output, supplying power to intrinsically safe controllers and I/O modules installed in hazardous process environments such as oil & gas, chemical processing, petrochemical plants, and offshore facilities. It supports redundant load sharing, allowing two power supplies to operate in parallel for increased system availability.

Because PAC8000 SafetyNet is a mature platform with declining OEM production, maintaining New Surplus inventory is an effective lifecycle strategy. Keeping qualified spare power supplies minimizes downtime, reduces procurement risk, and avoids the uncertainty associated with refurbished hardware. For SIL-rated systems, maintaining 1–2 spare power modules per installation is generally recommended.

Installation & Configuration Guide

Stage 1 – Pre-Installation (Preparation & Safety)

1. Perform Lock-Out/Tag-Out (LOTO).
2. Isolate all incoming 24 VDC power.
3. Wear a grounded ESD wrist strap.
4. Record wiring, redundancy configuration, and power distribution settings.
5. Verify hazardous-area work permits where applicable.

Stage 2 – Removal

1. Confirm all power sources are isolated.
2. Disconnect input and output terminals.
3. Release the carrier locking mechanism.
4. Remove the power supply from the carrier.
5. Inspect connectors and wiring for overheating or corrosion.

Stage 3 – Installation

1. Verify the replacement model is 8920-PS-DC.
2. Install the module onto the approved carrier.
3. Reconnect all DC wiring.
4. If redundant supplies are installed, verify load-sharing connections.
5. Confirm correct polarity before energizing.

Stage 4 – Power-On & Testing

1. Restore 24 VDC input power.
2. Verify stable 12 VDC output.
3. Confirm redundant operation if applicable.
4. Check controller and I/O module diagnostics.
5. Perform a complete system functional test before returning the process to operation.

8920-PS-DC

8920-PS-DC

Firmware / Software Versions & Upgrade Notes

• The 8920-PS-DC is a hardware power supply and does not require firmware updates.
• Verify compatibility with the installed PAC8000 carrier and I/O modules.
• Confirm proper redundancy configuration before commissioning.
• Replace both redundant power supplies only when required by maintenance procedures.
• After installation, verify output voltage, current sharing, and diagnostic status.

Frequently Asked Questions (FAQ)

Q1. Is this a New Original product?

Yes. This module is typically supplied as New Original / New Surplus. It is not used, repaired, or refurbished. Each unit should undergo serial number verification, visual inspection, and electrical testing before shipment.

Q2. What is the primary function of the 8920-PS-DC?

It provides isolated 12 VDC power from a 24 VDC input for PAC8000 intrinsically safe controllers and I/O modules operating in hazardous environments.

Q3. Does the module support redundancy?

Yes. The 8920-PS-DC supports load sharing, allowing multiple power supplies to operate in parallel for redundant, high-availability power systems.

Q4. Can the module be replaced while energized?

Replacement practices depend on the system architecture and site procedures. For most installations, GE/MTL recommends isolating DC power before replacing the module to maintain personnel safety and system integrity.

Q5. Why choose New Surplus instead of refurbished?

New Surplus modules retain original OEM manufacturing quality and have not been subjected to field aging. They generally provide higher reliability, longer expected service life, and lower operational risk than refurbished power supplies.

Q6. What warranty is appropriate for New Surplus inventory?

Professional industrial automation suppliers typically provide a 12 month warranty, including incoming inspection, electrical verification, serial number validation, anti-static packaging, and export-grade shipping protection.

Q7. What inventory strategy is recommended?

For facilities operating hazardous-area control systems, maintain 1–2 New Surplus 8920-PS-DC power supply modules as critical spare inventory. Because this platform is in the mature stage of its lifecycle, organizations should monitor component availability, qualify multiple suppliers, and implement last-time-buy planning to ensure long-term system support.