Product Description

Overview

The GE Wesdac D20 S Input Module 820-0154 is a high-density logic and status input panel designed for modern substation automation systems. It gathers digital signals from relays, switches, and sensors, then delivers accurate and time-stamped data to the D20 controller. Moreover, its modular architecture supports flexible integration and provides utilities with a reliable way to modernize long-running supervisory systems. Engineers value this module because it offers stable performance, wide environmental tolerance, and strong isolation between input groups.

Technical Specifications

General Information

• Manufacturer: GE (GE Vernova / GE Grid Solutions)

• Model Number: 820-0154 WESDAC D20 S

• Series: D20 Substation Automation System

• Product Type: Digital Status Input Module

Input Capacity

• 64 digital inputs total

• Organized into 8 groups of 8 channels

• Each group fully isolated with its own common return

Input Requirements

• Supports 12 VDC and higher input levels

• Designed for negative-ground field systems

Terminations

• All field terminations located on the bottom module

• Compression-type terminals ensure secure connections

Communication

• Communicates processed data to D20 main processor

• Supports Modbus TCP/IP and other SCADA protocols

Environmental Ratings

• Operating temperature: –40 °C to +70 °C

• Suitable for harsh substation and industrial sites

Physical Characteristics

• Dimensions: 100 × 80 × 20 mm

• Weight: 0.55 kg

• Mounting: Panel or rack installation

FAQ

Q1: What systems does the D20 S 820-0154 module support?
It integrates directly with GE D20 controllers used in substation automation and SCADA systems.

Q2: How many inputs does the module handle?
It supports up to 64 digital inputs arranged in eight isolated groups.

Q3: Can it operate in extreme environmental conditions?
Yes. It functions reliably from –40 °C to +70 °C, covering typical utility requirements.

Q4: What type of grounding does it support?
It is designed for negative-ground systems commonly found in substations.

Q5: Does the module support industry-standard protocols?
Yes. It communicates with the D20 processor using Modbus TCP/IP and related industrial protocols.