Redarc SPMB0002 Instruction Manual

The Redarc SPMB0002 is a high-performance dual battery isolator designed for 4WD, marine, and caravan applications. It features smart voltage sensing technology, automatic charging management, and robust construction for harsh environments. Below are key sections covering safety, installation, operation, specifications, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Operation Modes 8. Safety Features 9. Care & Maintenance 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Smart voltage sensing circuit, LED status indicators, heavy-duty terminals, thermal protection, and waterproof housing.

Feature	Description
Smart Voltage Sensing	Automatically connects/disconnects auxiliary battery based on voltage
LED Status Indicators	Shows charging status and fault conditions
Heavy-Duty Terminals	For secure battery and alternator connections
Thermal Protection	Prevents overheating during high current operation
Waterproof Housing	IP67 rated for protection against dust and water immersion
Reverse Polarity Protection	Safeguards against incorrect battery connections
Low Voltage Disconnect	Protects starter battery from excessive discharge
High Current Capacity	Rated for continuous 120A operation
Compact Design	Space-saving mounting for various applications
Automatic Operation	Requires no manual switching or adjustment

Installation

Unpack and inspect contents. Ensure proper mounting location.

Mounting: Choose dry, well-ventilated location away from heat sources.
Battery Connections: Connect main battery (BATT1) and auxiliary battery (BATT2) using appropriate cable sizes.
Alternator Connection: Connect to vehicle alternator output.
Ground Connection: Ensure solid ground connection to chassis.
Final Check: Verify all connections are tight and correct before powering.

WARNING! Disconnect all power sources before installation. Use appropriate personal protective equipment.

First-Time Setup

After installation, verify proper operation.

Initial Power Up: Reconnect main battery and observe LED indicators.
LED Verification: Green LED should illuminate indicating normal operation.
Voltage Check: Use multimeter to verify charging voltages at both batteries.
Load Test: Apply moderate load to auxiliary battery to test disconnect function.
Final Inspection: Ensure all connections remain secure after initial operation.

CAUTION! Do not reverse battery connections. Ensure proper fuse protection is installed.

Specifications

Model: SPMB0002
Continuous Current: 120A
Peak Current: 200A (5 seconds)
Voltage Sensing Range: 12V to 15V
Connect Voltage: 13.3V ± 0.2V
Disconnect Voltage: 12.7V ± 0.2V
Low Voltage Disconnect: 11.8V ± 0.2V
Operating Temperature: -40°C to +85°C
Storage Temperature: -40°C to +105°C
Protection Rating: IP67
Dimensions: 150mm x 100mm x 50mm
Weight: 850g

Controls and Settings

Automatic operation with visual status indicators.

LED Indicators:

Green Solid: Normal operation, batteries connected
Green Flashing: Charging in progress
Red Solid: Fault condition detected
Red Flashing: Over-temperature protection active
Off: No power or sleep mode

Voltage Settings: Factory preset; no user adjustment required.

Reset Function: Automatically resets after fault condition clears.

Connecting Devices

Compatible with various battery types and charging systems.

Battery Types: AGM, Gel, Calcium, Lithium (with appropriate settings)
Alternator Compatibility: Works with standard and smart alternators
Auxiliary Devices: Connect through appropriate circuit protection
Monitoring Systems: Can interface with battery monitors via voltage sense

Tip: Use minimum 6mm² cable for main connections. Install fuses within 300mm of battery positive terminals.

Operation Modes

Automatic switching between different operational states.

Charging Mode: When alternator voltage exceeds connect threshold
Isolation Mode: When voltage drops below disconnect threshold
Sleep Mode: Low current draw when vehicle is off
Protection Mode: Activated during fault conditions
Recovery Mode: Automatic restart after fault clearance

WARNING! Do not attempt to bypass the isolator. Ensure proper ventilation during operation.

Safety Features

Multiple protection mechanisms for safe operation.

Over-temperature Protection: Reduces current or disconnects at high temperatures
Short Circuit Protection: Instantaneous disconnect on fault detection
Reverse Polarity Protection: Prevents damage from incorrect connections
Voltage Spike Protection: Withstands automotive electrical transients
Thermal Management: Efficient heat dissipation design

Care & Maintenance

Regular inspection ensures optimal performance.

Monthly: Check terminal tightness and cable condition
Quarterly: Clean terminals and inspect for corrosion
Annually: Verify operation with voltage tests
As Needed: Clean exterior with damp cloth; avoid chemical cleaners

CAUTION! Disconnect power before cleaning. Do not use high-pressure water spray.

Regulatory Information

Complies with Australian Standards AS/NZS 3001.2. EMC compliant to CISPR 25. Manufactured under ISO 9001 quality system. Copyright © Redarc Electronics Pty Ltd. For support, visit www.redarc.com.au or contact customer service at 1300 733 272.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Red LED illuminated	Fault condition	Check connections; verify battery voltages; allow cool-down if overheated
No green LED	No power	Check main battery connection; verify fuse condition
Auxiliary battery not charging	Low alternator output	Test alternator voltage; check cable resistance
Excessive voltage drop	Undersized cables	Upgrade to recommended cable size; check connections
Intermittent operation	Loose connections	Tighten all terminals; inspect for corrosion
Overheating	High ambient temperature	Improve ventilation; reduce continuous load

Reset: Disconnect power for 30 seconds to reset unit.

Service: 1300 733 272; www.redarc.com.au