SIMARINE SCQ25T Digital Shunt and Tank Module - Technical Guide for Customer Service and Technical Staff

Introduction

The SIMARINE SCQ25T is a highly versatile digital shunt module designed for measuring voltage, current, liquid level, and temperature. It features four integrated 25 A shunts for measuring up to 35 V DC and continuous current up to 25 A on each shunt. Additionally, it can measure temperature or liquid levels (water, fuel, or any other liquid) with its four integrated resistance inputs (0 ohm - 65 kohm) and three voltage inputs (0 V - 32 V). The module also includes a configurable alarm contact for specific alarms, handling a maximum current of 1A at 30 V DC.

Safety Precautions

• Installation should be performed by electrical specialists with appropriate safety gear.
• Wear protective clothing and eye protection when working with batteries.
• Avoid contact with battery acid; in case of contact, wash immediately with soap and water for 15 minutes and seek medical attention.
• Do not connect anything to a damaged battery to prevent fire or explosion.
• Lead-acid batteries can generate explosive gases; ensure no smoking, flames, or sparks near the battery and maintain adequate ventilation.
• Remove personal metal items like watches and jewelry when working with batteries to prevent short circuits and severe burns.

Overview

The SCQ25T module includes:
- 4x shunt input/output
- 4x resistance sensing input
- 3x voltage sensing input
- 1x configurable alarm contact
- 2x SiCOM port for data connection

Installation

Mounting

• Install the module in a clean, dry place, away from potential liquid spills.
• Use the supplied screws to fix the module through the four holes on its sides.

Cables and Connections

SiCOM Data Cable: Use the supplied cable for SiCOM connections. For lengths >= 5m, use a 2x2x0.25 mm2 twisted pair cable.
Connecting: Connect the SCQ25T to Simarine PICO via the SiCOM port, connect consumers/generators through the SCQ25T shunt, and connect any compatible tank or temperature sensors to the module. Configure each connection via PICO.

Technical Specifications

• Voltage Range: 6 - 35 V
• Temperature Range: -20 – 70 °C (-4 – 158 °F)
• Power Consumption at 12V: 2.5 mA
• Current Measuring (per channel): 0.01 – 25 A, accuracy 0.6%, resolution 0.01 A, sampling rate 100 ms
• Voltage Inputs: 3, range 0 – 35 V, resolution 1 mV, accuracy ± 0.2%, sampling rate 10 ms
• Resistance Inputs: 4, range 10 ohm – 65 kohm, accuracy ± 0.1%
• Dimensions: 183x91x34 mm
• Connectivity: Up to 7 tank level sensors or 4 temperature sensors, 2 SICOM ports, 1 alarm contact

Troubleshooting

• Negative Current Values: Check shunt installation; the consumers/generators terminal should be connected to the IN terminal on the shunt. Adjust via PICO if necessary.
• Shunt/Tank Sensor Not Visible on PICO: Ensure proper connection via SiCOM port and correct cable specifications.
• Tank Sensor Showing Same Liquid Level: Verify sensor compatibility, installation, connection, and calibration via PICO.
• Tank Sensor Showing Empty Tank: Ensure the sensor covers the entire tank level and consider recalibration.

Appendix

Diagrams and examples provided in the original document illustrate typical connections and setups for the SCQ25T module, including connections to solar panels, wind generators, refrigerators, nautical instruments, and various sensors for comprehensive monitoring and control solutions.

This guide serves as a comprehensive reference for customer service and technical staff, providing essential information on installation, specifications, safety precautions, and troubleshooting for the SIMARINE SCQ25T module.