Overview

The DL-3100 Digital Output (DO) Module is an 8-channel relay output module designed for industrial automation systems. It features RS-485 MODBUS RTU communication, supporting remote operation and monitoring. Each output channel is electrically isolated, making it ideal for various control and signaling applications.

1. Safety Information (p.3-4)

• Electrical Hazards:
  • Ensure power isolation before installation or maintenance.
  • High voltage risks present; handle with care.
• Electrostatic Discharge (ESD) Precautions:
  • Avoid static electricity discharges.
  • Store and handle electronic components properly.

2. Storage Before Installation (p.5)

• Store in a dry, sheltered area to prevent environmental damage.
• Inspect all components for physical damage before installation.

3. System Description & Pin Assignments (p.6-7)

• Functionality:
  • Provides 8 relay output channels (NC or NO configuration).
  • Supports MODBUS RTU for seamless integration into industrial control systems.
  • Features LED indicators for Power & Communication status.
• Pin Assignments:
  • CH1 - CH8: Individual relay outputs with common (C) and output (O) terminals.
  • RS-485 Communication Ports: Primary and auxiliary connections.
  • 24V DC Power Input.

4. Installation & Wiring (p.8)

• Dry Contact Output Connection:
  • Supports Normally Open (NO) and Normally Closed (NC) relay contacts.
• Power & Communication Connections:
  • 24V DC power supply.
  • RS-485 MODBUS RTU communication interface.

5. Communication & Data Handling (p.9-10)

• Supported Baud Rates:
  • 1200, 2400, 4800, 9600, 38400, 57600, 115200.
• MODBUS Data Registers:
  • Output Control: Enables remote switching of relay channels.
  • Output Status Read: Retrieves the current state of relay outputs.
  • Relay Contact Configuration: Allows customization of NO/NC operation per channel.

6. Technical Specifications (p.6)

• Power Supply: 24V DC, 3VA consumption.
• Output Channels: 8 relay contacts (NO or NC).
• Max Switching Capacity:
  • 125VAC, 0.5A
  • 24VDC, 1A
• Communication Interfaces:
  • 2 x RS-485 MODBUS RTU.
• Environmental Conditions:
  • Operating Temperature: 0°C to 70°C.
  • Storage Temperature: -20°C to 70°C.
• Mechanical Data:
  • Material: Aluminum, Chromate Coating.
  • Dimensions: 105 × 27 × 74 mm.
  • Protection Class: IP20.

7. Revision History (p.11-12)

• Version R2 (2025.03.01) – Second revision of the technical manual.