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3A58945H01

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3A58945H01
June 05, 2026

3A58945H01

Model: 3A58945H01, H01 denotes hardware revision H01; it is a dedicated CRT display interface & power auxiliary board for legacy WDPF / early Ovation DCS Sun-based MMI operator station, designed for original SUN CRT monitor drive circuit of control room console. Original OEM production has been discontinued; available stock includes new surplus original parts and factory-tested refurbished modules for thermal power, petrochemical old DCS system spare replacement and console LCD retrofitting (replaces aging original SUN CRT screen driver).

Description

1. Product Overview

Manufacturer: Westinghouse (later acquired by Emerson Process Management, USA)
Model: 3A58945H01, H01 denotes hardware revision H01; it is a dedicated CRT display interface & power auxiliary board for legacy WDPF / early Ovation DCS Sun-based MMI operator station, designed for original SUN CRT monitor drive circuit of control room console.
Original OEM production has been discontinued; available stock includes new surplus original parts and factory-tested refurbished modules for thermal power, petrochemical old DCS system spare replacement and console LCD retrofitting (replaces aging original SUN CRT screen driver).

2. Electrical & Mechanical Specifications

  • Power Input: Backplane-fed +5VDC, ±12VDC from MMI rack; onboard isolated DC-DC converter for CRT screen auxiliary power output, total rated power consumption: ~15.8W

  • Interface Definition: Exclusive dedicated serial/video port matching original Sun 19-inch CRT monitor signal protocol, backplane connected to WESTBUS bus for HMI video data transmission, compatible with former 3A58939G series keyboard/mouse communication card to form complete operator station peripheral loop

  • Dimension: Standard Eurocard form factor: 235×162×28mm, net weight:1.42kg

  • Ambient Rating: Operating temp:0℃~+55℃ in sealed control cabinet; storage temp:-40℃~+85℃; PCB full conformal three-proof coating, anti-vibration component soldering, compliant with UL & CE industrial EMC certification for power plant automation equipment

3. Core Functions

  1. Video Signal Conversion: Receives screen display data from DPU controller via WESTBUS backplane, converts digital bus signal into analog video signal to drive original SUN CRT monitor; supports aftermarket 19.1-inch industrial LCD conversion adapter for obsolete CRT upgrade.

  2. Auxiliary Power Regulation: Supplies stabilized operating voltage for console display peripheral circuits, overvoltage/short-circuit hardware protection to avoid monitor burnout caused by rack power fluctuation.

  3. Onboard Self-Diagnosis: Front panel multi-color LED indicators for power status, backplane communication fault, display output abnormal; fault logs uploaded to upper DCS system for alarm record via rack bus.

  4. Hot-swap Compatible: Supports cold plug replacement after corresponding slot power cut without full MMI rack shutdown, minimizes maintenance downtime for field overhaul.

4. Typical Application

Mainly deployed in legacy WDPF/Ovation DCS control room operator consoles of coal-fired power plants, petrochemical refining unit central control cabinet; used as spare part replacement for failed CRT drive board and old monitor-to-LCD renovation project of metallurgy, municipal heating outdated DCS stations.

5. Installation & Maintenance Instruction

  1. Cut off target slot rack power before module installation, align card guide with cabinet slot and insert vertically then lock front fastener; verify backplane voltage specification consistency before power restoration.

  2. Wire original SUN CRT or retrofit LCD converter to dedicated board port per official pin definition, test screen display and data refresh after power-on.

  3. Regular half-year dust cleaning on PCB surface and terminal; spare modules stored in dry non-corrosive warehouse with quarterly short power-on inspection to prevent component aging from long-term idle storage.

6. Supply Status

Emerson ceased formal production of this model; commercial supply channels: certified refurbished tested modules or alternative updated Ovation display interface board for system modification.


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