Modicon AS-P890-000R 800 Series Power Supply Module

Description

3. Key Technical Specifications

4. Product Introduction & Supply Chain Strategy

The Modicon AS-P890-000R is a heavy-duty sub-rack power supply module designed to convert line-level AC power into regulated +5.1 V DC backplane logic power for 800 Series PLC processors and I/O modules. It features integrated isolation, surge protection, and parallel-redundancy capability to maintain system stability across continuous process industries, water utility stations, and heavy manufacturing lines.

Supplied strictly as Brand New Surplus, this module gives plant maintenance teams and procurement managers an essential insurance policy against total rack failure. Since a power supply failure drops the entire I/O rack instantly, sourcing New Surplus eliminates the elevated risks of used or refurbished power modules—such as dried-out primary filter capacitors, degraded transformers, or thermal fatigue—ensuring long Total Cost of Ownership (TCO) efficiency and zero unscheduled shutdown losses.

AS-P890-000R

AS-P890-000R

5. Installation & Configuration Guide

1.Stage 1: Pre-Installation (Prep & Safety):Safety Lockout & Site Prep.

Isolate the incoming AC power source feeding the PLC power terminal block using standard lock-out/tag-out (LOTO) safety procedures. Wear a grounded wrist strap before touching cabinet components. Check the line voltage select switch on the AS-P890-000R faceplate/side panel to verify it matches your field input supply (115 V AC or 230 V AC) before sliding the card into the chassis.

Verification: Test incoming supply leads with a calibrated multimeter to confirm zero AC potential.

2.Stage 2: Removal:Safe Card Extraction.

Loosen top and bottom mounting screws securing the failed power module to the rack chassis. Unplug the AC power input wiring harness from the front terminal block. Carefully pull the module straight out along its metal chassis guide rails to prevent twisting or stressing the heavy backplane connector assembly.

Verification: Inspect the backplane pin assembly and chassis grounding spring contacts for corrosion or heat degradation.

3.Stage 3: Installation (Clone & Seat):Voltage Verification & Insertion.

Re-confirm the voltage selector switch setting on the new AS-P890-000R module. Align the supply unit with the dedicated power slot card guides and slide it in smoothly until the rear connectors lock firmly into the backplane bus. Tighten top and bottom retaining screws to ensure proper earth grounding connection, then plug in the AC input terminal block.

Verification: Ensure the ground screw connection is securely bonded to the main enclosure chassis backplate.

4.Stage 4: Power-On & Testing:Cold Checks & Boot Sequence.

Remove LOTO devices and apply AC line power to the module input. Observe the front panel diagnostic status lamps. The “POWER” or “5V DC OK” LED should illuminate solid green instantly, indicating stable logic bus power. Verify that all adjacent CPU and I/O cards in the rack boot up correctly into their operational modes.

Verification: Measure +5.1 V DC across backplane test points (if accessible) to confirm output voltage stability under load.

6. Firmware/Software Versions & Upgrade Notes

• Hardware Compatibility: Fully compatible with all standard Modicon 800 Series sub-racks (e.g., B800 series chassis) and primary/secondary redundant power configurations.
• Voltage Select Warning: The AS-P890-000R includes a manual voltage selection bridge or switch. Applying 230 V AC power while the unit is configured for 115 V AC input will instantly destroy the internal MOV surge suppressor and primary switching transistors. Always verify line voltage before energizing.
• Redundancy Configuration: When operating dual AS-P890-000R supplies in a redundant sub-rack, ensure both units share equal incoming AC feed phase alignment and line filtering to prevent uneven load sharing and thermal stress on a single unit.

7. Frequently Asked Questions (FAQ)

Q: Is this Modicon AS- module original factory new, or refurbished?

A: This unit is 100% Brand New Surplus. It has never been deployed in an active plant rack, never pulled from scrapped machinery, and has zero circuit-level component repairs or replaced capacitors. It ships in ESD packaging with clean, untouched edge contacts.

Q: Why should we buy New Surplus power supplies instead of lower-cost refurbished units?

A: Power supplies suffer higher thermal stress than standard logic cards. Refurbished power units usually contain aging electrolytic capacitors that lose capacitance, leading to excessive ripple voltage, backplane instability, or sudden collapse under full I/O load. Paying a minor premium for New Surplus guarantees fresh internal components, maximum hold-up time, and full operational life.

Q: Can I hot-swap the AS- while the rest of the rack is powered?

A: If your sub-rack is configured with a single power supply, pulling the module will instantly shut down the entire rack. In dual-redundant power rack configurations, hot-swapping a single faulted supply is permissible provided all LOTO safety guidelines and AC terminal isolation protocols are strictly followed.

Q: Does this power supply unit require software configuration or DIP switch addressing?

A: No. The AS- is a pure power conversion hardware module. It does not require firmware flashing, parameter downloads, or software addressing. Operation is governed entirely by physical installation and input AC power connections.

Q: What is the warranty policy on this New Surplus board?

A: We back this AS- power module with a comprehensive 1-year functional replacement warranty from the delivery date. Every unit undergoes strict physical and electrical power verification prior to dispatch.