1. Product Overview

2. Electrical Specification Parameters

• Input Power: Dual redundant input design, 85~264VAC universal industrial alternating current mains input + auxiliary WESTBUS backplane pre-regulated DC backup input

• Multi-channel Stabilized DC Output: +5V, +12V, -12V regulated DC, total rated continuous output power 38W, for power supply of VME bus communication boards, SCSI storage modules and front-end peripheral circuit inside workstation rack

• Power Consumption: No-load standby power ≤3.2W, full-load rated operating consumption ≤41W

• Built-in full protection circuits: Overvoltage protection (OVP), foldback overcurrent limiting (OCP), short-circuit auto-cutoff, over-temperature thermal shutdown protection for all output channels

• Front panel LED indicators: AC input status, each DC channel output running signal, overheat/fault alarm indicator separately configured

Environmental Specifications

• Operating ambient temperature inside sealed control cabinet: 0℃ ~ +55℃

• Storage temperature: -40℃ ~ +85℃

• Working relative humidity: 5%~95% non-condensing, no dew formation allowed

• Compliance standard: UL industrial safety certification, CE EMC electromagnetic compatibility standard for power plant DCS cabinet application

3. Core Product Features

1. Dual redundant power input improves system uninterrupted operation reliability; automatically switches to backplane DC backup supply upon AC mains failure to avoid workstation sudden shutdown and historical data loss.

2. Independent channel fault isolation design: Single output channel failure will not interfere with other power rails and adjacent plug-in boards operation.

3. Fault diagnostic signal upload via VME/WESTBUS bus to host CPU, system HMI pops up fault alert and stores event log for maintenance traceability.

4. Standard single-width VME card structure supports cold slot replacement after independent slot power cut, no need to power off the whole workstation rack to reduce maintenance downtime.

5. Full PCB conformal three-proof coating (moisture-proof, dust-proof, anti-corrosion), adaptable to high-dust, high-humidity harsh industrial cabinet environment of power & chemical plants.

4. H02 Version Upgrade Improvement Details vs H01 Revision

1. Full-circuit high-temperature industrial grade electrolytic capacitors upgraded to reduce capacitance ageing failure rate under long-term continuous full-load operation.

2. Input EMI filter circuit optimized to enhance anti-interference performance against power grid harmonic and nearby frequency converter electromagnetic interference.

3. Internal PCB layout and heat dissipation layout revised to lower internal component working temperature and extend module service life.

4. Output voltage feedback loop optimized for tighter output precision and superior transient load stability during sudden load fluctuation.

5. Typical Application Scope

6. Installation & Maintenance Instructions

1. Strict ESD anti-static grounding specification must be followed during plug/unplug operation; cut off target slot power supply before module replacement work.

2. After installation and power restoration, measure all DC output voltage to confirm within rated tolerance before installing peripheral communication and storage boards.

3. Regular PCB surface and ventilation gap dust removal every six months to guarantee effective heat dissipation and stable long-term running.

4. Spare modules need storage in constant-temperature dry ESD controlled warehouse; quarterly short-time powered aging test is recommended to prevent component degradation caused by long idle storage.

7. Market Supply Status