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3A99141G01

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3A99141G01
June 05, 2026

3A99141G01

3A99141G01 (alias code:6PCQL2) is a Local I/O Bus Interface Module of Emerson Ovation DCS (origin Westinghouse USA), belonging to Q-series I/O rack communication card. It serves as the bridge between DPU main controller backplane and local I/O terminal rack, realizing high-speed data exchange between master control unit and on-site AI/DI/AO/DO field modules, widely used in thermal power, petrochemical DCS control cabinets.

Description

1. Product Overview

3A99141G01 (alias code:6PCQL2) is a Local I/O Bus Interface Module of Emerson Ovation DCS (origin Westinghouse USA), belonging to Q-series I/O rack communication card. It serves as the bridge between DPU main controller backplane and local I/O terminal rack, realizing high-speed data exchange between master control unit and on-site AI/DI/AO/DO field modules, widely used in thermal power, petrochemical DCS control cabinets.

2. Core Technical Specifications

Electrical Parameter

  • Working Power: +5VDC / ±12VDC powered by rack backplane, rated power consumption ≤28W

  • Bus Protocol: Ovation proprietary high-speed local I/O field bus, redundant bus channel design

  • Communication Rate: Max 2Mbps real-time synchronous data transmission

  • Drive Capacity: Single card supports up to 32pcs standard Ovation I/O cards cascading in local rack

  • Built-in circuit protection: Overvoltage, overcurrent, reverse polarity, EMC surge protection

Mechanical & Environmental

  • Structure: Standard plug-in European card for Ovation Q-type I/O rack, front panel with blue lock buckles

  • Net Weight: ~1.42kg; Dimension: standard Ovation module outline size

  • Operating Temp: -30℃ ~ +72℃; Storage Temp: -45℃ ~ +85℃

  • Humidity: 5%~95%RH non-condensing; comply with CE & IEC industrial anti-interference standard

3. Key Product Features

  1. Hot-swap Support: Online plug and replacement without cabinet power-off, no system outage during maintenance

  2. Redundancy Compatibility: Supports dual-card redundant parallel running; standby module automatically takes over communication upon primary failure

  3. Front Panel Status LED: Power OK, BUS RUN, Fault, Channel Alarm indicator for quick on-site troubleshooting

  4. Self-diagnosis Function: Onboard MCU real-time detects bus short-circuit, I/O rack offline, communication abnormal, and upload fault code to DPU controller

  5. Backplane gold finger connection: Directly plug into I/O rack backplane for power supply and bus wiring, no extra external wiring required

4. Main Application Scenarios

Thermal power plant boiler/turbine DCS local I/O cabinet; chemical production process control system; municipal sewage treatment DCS; metallurgy continuous rolling line distributed control, matches Ovation DPU and full series 1C31xxx I/O modules.

5. Installation & Maintenance Guidance

  1. Install into specified interface slot of Ovation standard Q-type I/O rack, fix front lock buckle to avoid loose contact from equipment vibration

  2. Critical control cabinet recommends redundant configuration (2pcs 3A99141G01 per I/O rack) to improve system reliability

  3. Annual maintenance: Clean PCB surface dust, inspect backplane golden finger oxidation condition, check rack cooling fan operating status

  4. Prohibit plugging/unplugging module under live power when field bus is loaded with full I/O points to avoid instantaneous bus surge damage


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