1. Product Overview

2. Key Features

• 12 Digital I/O Channels: Configurable as input or output (24 VDC).

• 4 Analog Inputs: 0–10 VDC or 4–20 mA selectable range.

• High‑Speed Operation: Digital I/O response time <1 ms.

• Wide Supply Voltage: 12–24 VDC ±20%.

• Industrial Grade: Operating temperature –40 °C to +70 °C.

• Vibration & Shock Resistant: 2.1 g vibration, 50 g shock.

• Communication Interface: RS‑485 (Modbus RTU) for easy integration.

• LED Status Indicators: Per‑channel diagnostics for quick troubleshooting.

• Compact Design: DIN‑rail mountable for space‑saving installation.

• Galvanic Isolation: 2 kV isolation between I/O and power supply.

3. Technical Specifications

3.1 General

3.2 Digital I/O

3.3 Analog Inputs

3.4 Environmental & Mechanical

4. Application Scope

• Power Generation: Genset control, grid monitoring, and protection systems.

• Marine Systems: Engine room automation, alarm monitoring, and safety systems.

• Renewable Energy: Wind turbine control, solar plant monitoring, and energy storage systems.

• Industrial Automation: Factory I/O expansion, machine control, and process monitoring.

• Building Automation: HVAC control, lighting management, and security systems.

5. Installation & Wiring

5.1 Installation Requirements

1. Mounting: Install on a standard 35 mm DIN‑rail or panel using 2 × M4 screws.

2. Clearance: Allow ≥20 mm clearance on all sides for ventilation.

3. Environment: Avoid direct sunlight, dust, moisture, and corrosive gases.

4. ESD Protection: Discharge static electricity before handling (PCB is ESD‑sensitive).

5.2 Terminal Wiring

5.2.1 Power & Communication

5.2.2 Digital I/O (CH1–CH12)

5.2.3 Analog Inputs (AI1–AI4)

5.3 Wiring Notes

• Power Cables: Use 1.5 mm² copper wires for power circuits; tighten terminals to 0.8–1.0 Nm.

• Communication: Use shielded twisted‑pair cable for RS‑485; ground shield at one end only.

• Analog Inputs: Use shielded cable for analog signals to reduce noise.

• Digital Outputs: Do not exceed 0.5 A per channel; use freewheeling diodes for inductive loads.

6. Operation & Configuration

6.1 Front Panel Indicators

• PWR: Solid green = power supply OK.

• RUN: Flashing green (1 Hz) = normal operation.

• FAULT: Solid red = communication error or overvoltage.

• CH1–CH12: Yellow LEDs = digital I/O status (on = active).

• AI1–AI4: Green LEDs = analog input activity.

6.2 Configuration Steps (DEIF PC Tool)

1. Connect: Use RS‑485 cable to connect the module to a PC.

2. Install: Download and install DEIF LSU‑112DG Configuration Tool (free from www.deif.com).

3. Connect to Device: Select the module from the device list (default Modbus address: 1).

4. Set Parameters:

   • Digital I/O Mode: Configure CH1–CH12 as input or output.

   • Analog Input Range: Select 0–10 VDC or 4–20 mA for each AI channel.

   • Modbus Settings: Set baud rate (9600–115200 bps), address, and parity.

   • Filter Settings: Enable digital filtering for analog inputs (0–10 s).

5. Write Config: Download settings to the module.

6. Verify: Check RUN LED and communication status.

6.3 Normal Operation

1. Power‑Up: The module initializes; PWR and RUN LEDs illuminate.

2. I/O Monitoring: Digital inputs/outputs and analog inputs are continuously monitored.

3. Communication: The module exchanges I/O data with the master controller via Modbus RTU.

4. Fault Handling: On fault (e.g., communication loss, overvoltage), FAULT LED illuminates; the module enters safe state.

7. Safety Precautions

• Electrical Hazard: Only qualified electricians may install or service the module.

• Overvoltage Protection: Do not exceed 30 VDC on power terminals.

• Short‑Circuit Risk: Avoid short‑circuiting digital output terminals.

• Environmental Limits: Operate only within –40 °C to +70 °C.

• No Unauthorised Modification: Do not open the enclosure; voids warranty and risks electric shock.

8. Maintenance

8.1 Regular Maintenance (Every 12 Months)

1. Visual Inspection: Check for loose terminals, damaged wiring, or discolouration.

2. Cleaning: Remove dust from vents with low‑pressure compressed air.

3. Terminal Tightness: Retorque terminals to 0.8–1.0 Nm.

4. I/O Test: Verify digital I/O and analog input functionality.

5. Communication Test: Verify RS‑485 communication and data exchange.

9. Troubleshooting

10. Warranty & Disclaimer

• Model: 100031593.1 (LSU‑112DG) Direct I/O Module.

• Warranty Period: 24 months from delivery (normal installation/use per manual).

• Warranty Exclusions: Misuse, overvoltage, lightning, water ingress, unauthorised modification, or operation outside environmental limits.

• Specifications Subject to Change: Manufacturer reserves the right to update specifications without notice.

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