DK7338.321 Rittal DET-AC III SLAVE EXTINGUISHING SYSTEM SLAVE UNIT

Why Choose the Rittal DK 7338.321 DET-AC III Slave Extinguishing System?

The Rittal DK 7338.321 DET-AC III Slave is a compact fire extinguishing add-on unit for protected IT and server enclosures. Designed to operate with a compatible DET-AC III Master or EFD III system, the slave unit provides an additional supply of extinguishing agent for an individual bayed enclosure while detection and activation are controlled by the master system.

For multi-enclosure installations, a DET-AC III Slave can be installed in additional bayed cabinets to extend fire protection across the enclosure suite. Communication between master and slave units is provided through CAN bus networking. When the master system detects a main alarm condition, extinguishing can be activated simultaneously across the connected systems.

The DK 7338.321 occupies just 1 U in a standard 482.6 mm (19-inch) rack and contains a 2 l aluminium tank with approximately 1.8 l of FK 5-1-12 extinguishing agent. The agent is discharged using a propellant cartridge with an integral electrical activation unit, while integrated monitoring indicates an extinguishing-agent loss greater than 15%.

Key Advantages

• Extends a compatible DET-AC III fire extinguishing system across multiple bayed enclosures.
• Compact 482.6 mm (19-inch), 1 U rack-mount design.
• Uses FK 5-1-12 extinguishing agent, suitable for protecting sensitive IT equipment.
• Integrated CAN bus networking for communication between master and slave systems.
• Supports integration with the Rittal CMC III monitoring system.
• Integrated extinguishing-agent monitoring indicates a loss of more than 15%.

Key Features

• Rittal DET-AC III Slave extinguishing system.
• Add-on extinguishing unit for compatible DET-AC III Master and EFD III systems.
• 1 U, 482.6 mm (19-inch) rack mounting.
• 24 V DC rated operating voltage.
• 2 l aluminium extinguishing-agent tank.
• Approximately 1.8 l FK 5-1-12 extinguishing-agent fill.
• Propellant cartridge with integral electrical activation unit.
• Integral extinguishing-agent loss and fill-level monitoring.
• CAN connections for master-slave networking.
• CAN bus interfaces for CMC III integration.
• Tested by VdS Schadenverhütung GmbH.

Scalable Fire Suppression for Server Enclosures

The Rittal DET-AC III Slave enables fire suppression to be extended beyond a single protected cabinet. Each additional slave provides extinguishing agent for its associated enclosure, while detection and control remain centralised through the compatible master system. This architecture provides coordinated fire protection for bayed server and IT cabinets without requiring a completely independent detection system in every enclosure.

The slave unit communicates with the master through CAN networking and incorporates interfaces for alarms, faults, door monitoring and external signalling. In conjunction with a compatible DET-AC III Master, the system can provide coordinated extinguishing for up to five racks in an enclosure suite, making it suitable for critical IT environments requiring scalable enclosure-level fire protection.

Typical Applications

• Bayed server enclosure systems.
• Data centre server and network cabinets.
• Critical IT infrastructure.
• Telecommunications enclosure systems.
• Industrial IT and communications cabinets.
• Multi-rack DET-AC III fire protection installations.