Email: sales@slxytech.com
WhatsApp / Wechat：8617062388866
Phone：+86 17062388866Description
The WESDAC D20 C 504-0002-13 is a legacy Communication Interface Module from Westinghouse’s WesDac™ D20 Distributed Control System (DCS), designed to enable data exchange between D20 controller clusters and supervisory systems. This module facilitates deterministic communication across proprietary WesDac networks (e.g., WDPF/WDCN) using serial protocols, integrating real-time process data for operator consoles and historians in power generation and heavy industrial applications. Engineered for reliability in harsh environments, the D20 C 504-0002-13 supports dual-redundant RS-422/485 ports with error-correcting algorithms to maintain data integrity during network disturbances. Its ruggedized steel enclosure and conformally coated circuitry resist vibration, temperature fluctuations (0–60°C), and electrical noise, ensuring continuous operation in coal-fired plants, steel mills, and water treatment facilities where system downtime incurs significant losses.
WESDAC D20 C 504-0002-13
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | WESDAC D20 C 504-0002-13 |
| Manufacturer | Westinghouse (now Emerson Process Management) |
| Product Type | DCS Communication Interface Module |
| Bus Compatibility | WesDac WDPF/WDCN |
| Ports | 2x RS-422/485 (redundant) |
| Data Rate | 19.2 kbps (max) |
| Protocol | Westinghouse proprietary (HDLC-based) |
| Isolation | 1,500 VAC port-to-logic |
| Power Supply | 24 VDC ±10% (via backplane) |
| Power Consumption | 1.8 W (typical) |
| Operating Temperature | 0°C to +60°C (32°F to 140°F) |
| Dimensions | 200 × 60 × 120 mm (W×H×D) |
| Mounting | D20 Series Rack Slot |
| Certifications | UL 508, CSA C22.2 No. 142 |
Main Features and Advantages
Deterministic Data Routing: Implements hardware-level CRC checks and automatic retransmission for packet loss recovery, ensuring >99.9% data integrity in electrically noisy substations or turbine halls. Dual-port redundancy switches traffic within 50 ms during line faults.
Legacy System Integration: Bridges WesDac D20 controllers (e.g., D20 P 501-xxxx) to WDPF peer-to-peer networks, enabling plant-wide data sharing for load balancing and alarm management. Compatible with Westinghouse OIS™ operator stations.
Maintenance-Friendly Design: Front-accessible status LEDs (network activity/fault) simplify diagnostics. Hot-swappable when used in redundant pairs. Slide-lock mechanism secures module during vibration (tested to IEC 60068-2-6).
Application Field
The WESDAC D20 C 504-0002-13 was deployed in:
Power Generation: Synchronizing turbine control data between D20 controllers and WDPF historian in coal/gas plants.
Water Treatment: Transmitting pump station statuses to central SCADA via WDCN networks.
Steel Production: Integrating blast furnace temperature controllers with supervisory systems.
Pulp & Paper: Relaying digester pressure/temperature data to mill-wide DCS.
WESDAC D20 C 504-0002-13
Related Products
WESDAC D20 P 501-0001: Processor module requiring C 504-0002-13 for network access.
WESDAC D20 AI 511-xxxx: Analog input module for process signals.
WESDAC WDPF II Peer-to-Peer Network: Legacy network backbone.
Emerson Ovation DCS: Modern migration platform for WesDac systems.
WESDAC D20 PS 550-0003: Power supply module for D20 racks.
