Contact Info

4D33755G01 Standard 12-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS

Home / Product/ Emerson
4D33755G01 Standard 12-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS
June 10, 2026

4D33755G01 Standard 12-Channel Isolated Discrete Output Terminal Daughter Card for Common Q Class 1E Nuclear Safety DCS

NRC Class 1E nuclear safety certified, the 4D33755G01 is a standard isolated discrete output terminal subboard tailored for Emerson Westinghouse Common Q nuclear safety I&C platform. It converts digital logic commands from master control boards into isolated switching signals to drive on-site solenoid valves, alarm beacons, small contactors and low-power safety actuators. Each channel is equipped with independent 1500V galvanic isolation and multi-stage LC EMI filters to suppress mains frequency interference, ground potential drift and lightning transient surges. Adopting standard hard gold-plated backplane connectors and anti-corrosion nickel screw terminals, the board integrates complete per-loop protection, open/short-circuit fault diagnosis and hot-swap capability, delivering steady switching drive for conventional auxiliary safety equipment under high-temperature, high-humidity and dusty nuclear plant environments.

Description

Parameter Specifications

  1. Part Number: 4D33755G01

  2. Manufacturer: Emerson Westinghouse

  3. Compatible System: Common Q Class 1E Safety Instrument & Control DCS System

  4. Matching Accessories: Discrete output logic master boards, 49E-3649 rack backplane, 475HP1ENA9GMT redundant rack power supply

  5. PCB Material: Multi-layer isolated V-0 flame-retardant high-Tg FR-4

  6. Dimension & Weight: 120mm × 66mm × 20.6mm; Net weight: 58g

  7. Ambient Conditions: Operating temperature -25℃ ~ +70℃; Storage temperature -50℃ ~ +125℃; Humidity 5%–95% RH, non-condensing

  8. Power Supply: DC 12V / DC 24V dual adaptive input

  9. Output Channels: 12 fully independent galvanic isolated discrete output channels

  10. Drive Type: Isolated transistor switching output for low-power field safety loads

  11. Per-channel Continuous Rated Current: 0.7A

  12. Isolation Performance: 1500V AC isolation voltage per channel; 2000V AC dielectric withstand for 60s; Insulation resistance ≥1200MΩ @ 500VDC

  13. EMC Index: Power frequency interference attenuation ≥40dB, compliant with IEC 61000-6-2 industrial EMC standard

  14. Protection & Diagnosis: Per-channel current-limiting protection, bidirectional surge absorption, reverse polarity protection, open-circuit/short-circuit fault detection, real-time fault status upload to main controller

  15. Mechanical Performance: Continuous vibration resistance 8g (10–150Hz); Shock resistance 25g pulse, duration 11ms

  16. Core Feature: Single-module hot swappable under energized rack

  17. Certifications: CE, UL508, IEC60204-1, NRC Class 1E nuclear safety certification

  18. Aging Test Standard: 72-hour full-load high-low temperature cyclic aging test

  19. Design Service Life: ≥100,000 hours of 24/7 uninterrupted continuous operation

  20. Warranty: 12-month global unified warranty

Application Fields

  1. Nuclear power plant Common Q Class 1E safety I&C racks: Standard switching drive terminal for auxiliary cabinet solenoid valves, local alarm lights and auxiliary control contactors

  2. AP1000 nuclear Post-Accident Monitoring System (PAMS): Isolated switching output board for containment auxiliary vent valves and accident alarm annunciators

  3. Thermal & hydropower station control systems: Discrete output module for boiler drain solenoids, flue gas dampers and unit fault buzzers

  4. Explosion-proof petrochemical DCS: Drive wiring card for reactor shut-off solenoids, tank over-limit alarms and pump auxiliary contactors

  5. Offshore oil & gas explosion-proof automation racks: Isolation drive interface for wellhead ESD solenoids, platform warning lights and heating device contactors

  6. Large diesel generator safety sequential control cabinets: Discrete output subcard for emergency stop solenoids, critical fault alarms and cooling pump contactors

  7. Municipal large-scale water treatment safety interlock DCS: Switch drive terminal for pipeline cut-off solenoids, chemical dosing contactors and overflow alarm devices

  8. Metallurgy and cement kiln production lines: Discrete drive module for kiln isolation solenoids, dust removal fan contactors and high-temperature alarm horns


Get a Quote

Search

Categories

pages