1. Product Overview

2. Main Features

• Dual-Board Architecture: Combines a synchronisation/measurement board (compatible with SCM4.1) and a dedicated Engine Module (EM) for enhanced engine control.

• Precision Synchronisation: Programmable Δf, ΔV, Δθ thresholds with adaptive logic for fast, safe generator-to-busbar connection.

• Multi-Parameter Measurement: 3-phase voltage/current, frequency, power factor, active/reactive power, and harmonics (up to 15th) monitoring.

• Integrated Protection Suite: Overcurrent, short-circuit, reverse power, overpower, over/undervoltage, over/underfrequency, and earth fault protection.

• Dual-Loop Regulation: PID-based voltage/VAr and frequency/kW control; supports both electronic and mechanical governors/AVRs (via optional OPR-1 relay boards).

• Flexible Communication: Modbus TCP/RTU, CANopen, and Ethernet interfaces for PLC/SCADA integration.

• Marine & Industrial Compliance: Rugged design for harsh environments; wide-temperature operation, EMC compliance, and vibration resistance.

• Local HMI: Backlit LCD and keypad for real-time data display and on-site parameter configuration.

• Fault Data Logging: Non-volatile memory stores up to 200 fault events with timestamps and event codes.

• Hot-Swappable Design: Supports online replacement without system shutdown (DM-4 platform).

3. Technical Specifications

3.1 Power Supply

• Rated Voltage: 24 VDC (18–30 VDC operating range)

• Power Source: Backplane-fed (DM-4 rack) or external terminal

• Power Consumption: ≤18 W

• Isolation: 2500 VAC between power and measurement circuits

3.2 Measurement Inputs

• Generator Voltage: 0–690 VAC (PT selectable: 100/110/400/690 V)

• Generator Current: CT secondary 1A or 5A (jumper-selectable)

• Busbar Voltage: 0–690 VAC (PT selectable, same as generator)

• Frequency: 45–65 Hz (50/60 Hz auto-detect)

• Accuracy: Class 0.2 (V/I); Class 0.5 (power/frequency)

• Sampling Rate: 1 kHz/channel (simultaneous sampling)

• Harmonic Measurement: Up to 15th harmonic (THD monitoring)

3.3 Synchronisation Parameters

• ΔFrequency Range: ±0.05–±1.0 Hz (default ±0.2 Hz)

• ΔVoltage Range: ±1–±10% of rated voltage (default ±5%)

• ΔAngle Range: 0–30° (default 10°)

• Synchronisation Time: ≤8 seconds (adaptive)

• Modes: Dynamic (auto-adaptive) / Static / Manual synchronisation

3.4 Protection Functions (Adjustable Thresholds)

• Overcurrent (I>): 100–200% In (1–30 s delay)

• Short-Circuit (I>>): 200–500% In (instantaneous, <50 ms)

• Reverse Power (–P>): 2–20% Pn (1–10 s delay)

• Overpower (P>): 100–150% Pn (5–60 s delay)

• Overvoltage (V>): 105–120% Vn (1–10 s delay)

• Undervoltage (V<): 80–95% Vn (1–10 s delay)

• Overfrequency (f>): 51–55 Hz (50 Hz) / 61–65 Hz (60 Hz)

• Underfrequency (f<): 45–49 Hz (50 Hz) / 55–59 Hz (60 Hz)

• Earth Fault: 5–20% In (1–5 s delay)

3.5 Communication Interfaces

• Ethernet: Modbus TCP (10/100 Mbps, RJ45)

• Serial: RS485 (Modbus RTU, 9.6 kbps–1 Mbps)

• Fieldbus: CANopen (250 kbps–1 Mbps)

• Protocol Support: Modbus RTU/TCP, CANopen, DNP3 (optional)

3.6 Environmental Conditions

• Operating Temperature: -25°C to +70°C

• Storage Temperature: -40°C to +85°C

• Relative Humidity: 5–95% RH, non-condensing

• Vibration: 5–150 Hz, 0.1 mm amplitude (IEC 60068-2-6)

• Protection Class: IP20 (terminals); IP40 (housing)

3.7 Mechanical Parameters

• Mounting: DM-4 19-inch rack (3U: 130 × 90 × 45 mm)

• Housing: Flame-retardant engineering plastic + metal reinforcement

• Weight: ~1.5 kg

• Compatibility: DM-4 Land / DM-4 Marine racks

4. Application Scope

• Marine Power Plants: Main/auxiliary generator control, synchronisation, and load sharing in vessels (compliant with SOLAS).

• Offshore Platforms: Isolated grid generator control and fault monitoring.

• Industrial Standby Power: Backup generator control for factories, data centers, and hospitals.

• Distributed Power Stations: Grid-tied/off-grid generator parallel operation and load management.

• Hybrid Energy Systems: Generator integration with solar/wind for grid stability.

5. Installation and Wiring

5.1 Installation Requirements

1. Install in a standard DM-4 19-inch rack (3U slot) with proper grounding.

2. Maintain ≥20 mm clearance around the module for heat dissipation.

3. Mount away from frequency converters, large contactors, and high-power electromagnetic devices.

4. Use anti-static precautions during installation.

5. Do not install in corrosive, dusty, or condensing environments.

5.2 Wiring Rules

1. Perform all wiring with the system power off; only qualified electrical personnel should install or maintain the module.

2. Measurement wiring (V/I): 1.5–2.5 mm² shielded copper wire; separate from high-voltage cables.

3. Power wiring: 1.0–1.5 mm² copper wire (backplane-fed preferred).

4. Communication wiring: CAT5e/CAT6 (Ethernet); 0.8–1.0 mm² twisted pair (RS485/CAN).

5. Tighten terminal screws to 0.8–1.0 Nm.

6. Never open CT secondary circuits during operation—this induces lethal high voltage.

5.3 Terminal Definition (External)

• Power: +24 VDC, 0 VDC, PE

• Generator Voltage: G_L1, G_L2, G_L3, G_N

• Generator Current: CT_L1, CT_L2, CT_L3, CT_Common

• Busbar Voltage: B_L1, B_L2, B_L3, B_N

• Breaker Control: BRK_ON, BRK_OFF, BRK_STATUS (NO/COM/NC)

• Relay Outputs: ALARM, TRIP, AUX (NO/COM/NC, 250 VAC 8A / 24 VDC 8A)

• Communication: ETH (RJ45), RS485 (A/B), CAN (H/L)

• Digital Inputs: START, STOP, RESET, SYNC_ENABLE, GOVERNOR_AVR

5.4 OPR-1 Relay Board Installation (Optional)

• Speed Governor: Mount one OPR-1 board for mechanical speed governor outputs.

• Voltage Regulator: Mount a second OPR-1 board for mechanical AVR outputs.

• Analogue Interface: Remove OPR-1 boards if using electronic governors/AVRs.

6. Operation and Configuration

6.1 Indicator & Display Description

• PWR: Steady on = power normal; Off = no power/fault.

• RUN: Flashing = normal operation; Steady on = fault.

• SYNC: Flashing = synchronising; Steady on = synchronised.

• COM: Flashing = communication active; Off = no communication.

• ALARM: On = alarm triggered; Flashing = latched alarm.

• TRIP: On = trip output activated (breaker open).

• LCD Display: Real-time V/I/f/power, fault messages, and menu navigation.

6.2 Parameter Configuration (Local/Remote)

1. Local Configuration (LCD/Keypad):

   • Navigate menus with arrow keys; confirm with ENTER.

   • Set PT/CT ratios, rated V/f, and synchronisation thresholds.

   • Configure protection thresholds, time delays, and PID parameters.

   • Set communication parameters (IP, baud rate, protocol).

   • Save settings to non-volatile memory.

2. Remote Configuration (DEIF Utility Software):

   • Connect via Ethernet/RS485; compatible with Windows 10/11.

   • Detect module, configure parameters, and download settings.

   • Monitor real-time data, view fault logs, and update firmware.

6.3 Normal Operation

7. Safety Precautions

1. High voltage exists on V/I input terminals; wiring/maintenance must be done with power off.

2. Never open CT secondary circuits during operation—risk of lethal high voltage.

3. Do not disassemble the module without authorisation; voids warranty and risks electric shock.

4. Do not operate beyond specified V/f/temperature/vibration limits.

5. After protection tripping, eliminate the fault and reset the module before re-closing the breaker.

6. Keep the module away from water, moisture, and corrosive substances.

8. Maintenance

1. Monthly: Check terminal tightness, wire condition, and LED/LCD status.

2. Quarterly: Clean dust with a dry soft cloth; do not use liquid cleaners.

3. Annually: Verify measurement accuracy, synchronisation performance, and protection threshold calibration.

4. As Needed: Update firmware via DEIF Utility Software.

5. Replacement: Hot-swap the module (DM-4 rack) and reload configuration.

9. Troubleshooting

• PWR Off: No 24 VDC, reverse wiring, or internal fuse blown.

• RUN Fault: Self-test failure, configuration error, or hardware fault.

• SYNC Failure: Incorrect Δf/ΔV/Δθ settings, wiring error, or parameter mismatch.

• Measurement Inaccuracy: PT/CT ratio misconfiguration, wiring error, or interference.

• False Alarm/Trip: Thresholds set too low, interference, or ground loop.

• Communication Failure: Incorrect settings, cable fault, or network error.

• OPR-1 Output Fault: Loose board mounting or wiring error.

10. Warranty and Disclaimer

• Model: SCM4.2 Synchronising, Control & Measuring Module.

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

• Warranty Exclusions: Damage from wrong wiring, overvoltage, lightning, water ingress, unauthorised disassembly, or operation beyond environmental specs.

• Modifications: Manufacturer reserves the right to update specs and this manual without prior notice.

•