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GE WESDAC D20 C (820-0221) Analog Digital I/O Combination Module--KIMI
- Warehouse: Spot
- Warranty： 365 days
- Quality: Original module
- Condition： New
- Shipping method: Courier delivery
- Contact person: LI MING
- Contact number: +86 18059884790
- WeChat：18059884790
- E-mail: plc66@qq.com
Product Description
GE WESDAC D20 C (820-0221) Analog Digital I/O Combination Module
Data Acquisition, Control Output & Communication for GE D20 Industrial Control Systems
1. Product Overview
The GE WESDAC D20 C (Part No.: 820-0221) is a detachable top-module of the D20 Combination Module, paired with the WESTERM D20 C (field wiring termination module) for GE D20 industrial control systems, widely used in power generation, chemical, oil & gas, and other industrial sectors. As a core I/O processing component, it integrates digital status monitoring, analog signal acquisition, control output execution, and data communication with the main D20 processor, designed for small point-count applications requiring integrated I/O capabilities. The module features a dedicated 8-bit microprocessor, expandable analog I/O, and reliable relay outputs, ensuring stable data processing and seamless system integration, making it an ideal choice for precise industrial process control and real-time monitoring.
2. Key Technical Specifications
• Brand & Model: GE WESDAC D20 C (Part No.: 820-0221)
• Product Type: Analog Digital I/O Combination Module (Top Module of D20 Combo)
• Core Function: Digital/Analog Signal Processing, Control Output Execution, D20 System Communication
• Microprocessor: Freescale 68HC11 8-bit MPU (2 MHz Clock Speed)
• Memory: 24 KB EPROM, 32 KB Static RAM, 512 B EEPROM
• Digital Inputs: 16 Optically Isolated Status Inputs (2 Groups of 8), ±12/±24/±48/±125 VDC
• Control Outputs: 8 Relay Outputs + 2 Master Trip/Close Relays (Programmable Contact Duration: 1 ms - 215 s)
• Analog I/O (Optional): Plug-in Daughter Cards for 16 AI or 8 AI/8 AO (14-bit Resolution)
• Analog Accuracy: ±0.05% (Voltage), ±0.1% (Current)
• Communication Interface: D20 Link (2 DB9 Connectors), WESMAINT RS-232 (9600 Baud)
• Power Supply: 20-60 VDC (Typical 5 W, Max 11 W)
• Protection Class: IP20 (Rack Mount in D20 Cabinet)
• Operating Temperature: -40°C to +70°C (-40°F to +158°F)
• Storage Temperature: -40°C to +85°C (-40°F to +185°F)
• Dimensions (W×H×D): 178 × 229 × 76 mm (7.0 × 9.0 × 3.0 in)
• Weight: Approx. 0.9 kg (2.0 lbs)
• Certification: CE, UL, IEC 61010-1
3. Core Features
• Detachable Design: Paired with WESTERM D20 C for Field Wiring Termination & Data Processing Separation.
• Versatile I/O: Supports Digital Status Monitoring, Relay Control, and Expandable Analog Acquisition.
• High Accuracy: 14-bit Analog Resolution & Precision Calibration Ensure Reliable Signal Measurement.
• Flexible Expansion: Multiple LV/HV Daughter Cards for Custom AI/AO Configurations (16 AI or 8 AI/8 AO).
• Robust Communication: D20 Link for System Networking, WESMAINT for Maintenance & Diagnostics.
• Programmable Outputs: Master Trip/Close Relays & Adjustable Contact Duration for Control Flexibility.
• Optically Isolated I/O: Prevents Cross-Interference & Enhances System Anti-Interference Ability.
• Hot-Swappable: Detachable Modules Enable Online Replacement Without System Shutdown.
3. Typical Applications
• Power Generation: Substation Equipment Monitoring, Generator Auxiliary Control, Switchgear Status Check.
• Chemical Industry: Reactor Temperature/Pressure Control, Valve Actuator Operation, Pump Status Monitoring.
• Oil & Gas: Pipeline Flow Control, Compressor Auxiliary Systems, Offshore Platform Process Monitoring.
• Petrochemical: Refinery Furnace Control, Tank Level Monitoring, Safety Interlock Systems.
• Metallurgy: Rolling Mill Auxiliary Control, Furnace Temperature Regulation, Conveyor System Monitoring.
• Water Treatment: Pump Station Control, Chemical Dosing System, Flow/Media Quality Monitoring.
4. Installation & Maintenance
• Mounting: Rack Mount in GE D20 Standard Chassis (Pairs with WESTERM D20 C Bottom Module).
• Wiring: Field Wiring Terminated on WESTERM D20 C; Connect D20 Link & Power to Top Module.
• Configuration: Set I/O Parameters, Relay Logic via WESMAINT Software or D20 Processor.
• Calibration: Auto-Calibration for Analog Channels; Regular Verification with Standard Signal Sources.
• Diagnostics: LED Indicators for Power, Communication, I/O Status; WESMAINT for Remote Troubleshooting.
• Maintenance: Detachable Modules for Easy Replacement; Inspect Relays & Terminals Periodically.
Technical Document | GE WESDAC D20 C | Analog Digital I/O Module | Industrial Process Control
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