Callenberg SYMAP ECG-8549

Core Technical Specifications

• Operating Supply Voltage: 24 VDC marine standard battery supply, operating range 18–32 VDC
• Generator Voltage Monitoring Input: PT400 three-phase AC voltage measurement, 0–480 VAC RMS
• Current Transformer Input Range: 0–5 A secondary CT input for generator load current sampling
• Speed Sensing Interface: Magnetic pickup sensor input 0–10,000 Hz engine RPM signal
• Digital Relay Outputs: 8 isolated relay contact outputs, rated 5 A / 250 VAC each for alarm and shutdown actuation
• Digital Input Channels: 12 opto-isolated DC fault signal inputs (oil pressure switch, temperature sensor, emergency stop)
• Communication Interface: RS485 Modbus RTU for remote SCADA monitoring, marine ship automation system integration
• Operating Temperature Range: -10 °C to +65 °C marine rated; storage -30 °C to +75 °C
• Vibration Resistance Compliance: IEC 60068-2-6 marine vibration standard 10–2000 Hz continuous shock resistance
• Salt Fog Corrosion Grade: ISO 9227 500-hour salt spray certified
• Panel Display: 2-line 16-character backlit LCD screen with marine low-light adjustable brightness
• Physical Size: 180 mm width × 110 mm height × 62 mm depth
• Net Weight: 1.2 kg

Key Functional Features

1. Closed-loop electronic engine speed governor with adjustable PID droop control for parallel generator set load sharing
2. Full electrical generator protection suite: overvoltage, undervoltage, overfrequency, underfrequency, reverse power, overcurrent short-circuit trip
3. Mechanical engine safety protection: low lubricating oil pressure hard shutdown, high coolant temperature alarm/trip, overspeed emergency fuel cut-off
4. Automatic generator parallel synchronization logic with configurable soft load transfer ramping
5. Real-time data logging of all fault events with timestamp recording, 500-event non-volatile memory storage
6. Configurable alarm delay timers to eliminate false shutdown triggered by transient engine startup fluctuations
7. Password protected parameter access to prevent unauthorized engine control setting modification
8. Built-in battery voltage monitoring with low battery pre-alarm for marine vessel power management
9. Remote start/stop contact input interface compatible with ship bridge control panels

Working Principle

1. Magnetic pickup sensor continuously captures engine crankshaft rotational frequency signal, converted by internal circuit to real-time RPM value
2. Three-phase generator voltage and CT current signals are sampled to calculate electrical output power, frequency and load balance
3. Internal microcontroller compares measured operating parameters against user-configured safety threshold values
4. If parameter exceeds safe operating window, corresponding isolated relay output activates to trigger audible/visual alarm or immediate engine fuel shutdown interlock
5. Speed control loop generates adjustable analog output signal to drive engine fuel actuator, maintaining stable rated RPM under variable generator load
6. Modbus RTU communication transmits all real-time operating data to vessel central automation SCADA system for remote monitoring and historical data archiving

Material & Structural Composition

• Front Panel Housing: ABS flame-retardant marine plastic with UV and salt fog resistant coating
• Main Chassis Frame: Galvanized cold rolled steel anti-corrosion support frame
• Internal Circuit Board: Conformal coated FR4 PCB to resist condensation and salt crystal deposition in marine environments
• Terminal Block Connectors: Nickel-plated copper screw terminals to avoid oxidation in high-humidity coastal atmosphere
• LCD Window: Scratch-resistant tempered polycarbonate transparent cover

Installation Mandatory Requirements

1. DIN rail cabinet mounting inside sealed marine electrical control room, protected from direct seawater splash
2. Magnetic pickup speed sensor wiring must be shielded twisted pair, separate routing away from high-current generator power cables
3. All DC input signal wiring must use marine grade insulated cable rated for -40 °C low temperature operation
4. CT secondary current input terminals must never be opened while generator set is running to avoid dangerous high voltage generation
5. Mount unit vertically only; horizontal installation voids marine vibration resistance certification
6. Maintain minimum 30 mm clearance on all sides for passive heat dissipation inside control cabinet

Application Scenarios

Operation & Maintenance Precautions

1. Conduct monthly salt residue cleaning of front panel LCD and terminal blocks with deionized water cloth for offshore vessel deployment
2. Calibrate engine speed PID parameters after fuel injector overhaul or engine mechanical component replacement
3. Verify CT wiring polarity quarterly to prevent reverse power protection misoperation
4. Avoid power cycling module repeatedly within short intervals to protect non-volatile fault log memory
5. Replace magnetic pickup sensor wiring every 2 years in coastal marine environments to prevent signal cable corrosion failure
6. Do not modify internal conformal coating layer; coating damage accelerates circuit board corrosion under salt fog conditions