Cooper CSI350 Intelligent Addressable Spur Isolator Unit

The Cooper (Eaton) CSI350 is a specialized interface module that simplifies the expansion of fire alarm systems by enabling “T-tapping” or spurring off the main addressable loop. This is particularly useful for extending detection into remote parts of a building or adding devices to an existing system without rerouting the entire loop. The unit automatically manages the digital addressing sequence via soft addressing, ensuring that the control panel identifies all devices in the correct order. It features an integral short-circuit isolator that protects the main loop from faults on the spur, and vice-versa. Housed in a durable ABS casing and designed to fit a standard double-gang backbox, the CSI350 is a “plug and play” solution that reduces installation costs while maintaining the high system integrity required by EN54-17 standards. Technical Specifications ? Brand: Cooper (Eaton) ? Model/Part No: CSI350 ? Operating Voltage: 17 V DC to 32 V DC ? Standby Current: < 200 ?A ? Maximum Loop Current: 1 A ? Addressing Mode: Soft Addressing ? Terminals: Loop In, Loop Out, and Spur Output ? IP Rating: IP30 ? Mounting: Standard Surface or Flush Wall Box ? Dimensions: 88 mm x 147 mm x 38 mm (3.46 inch x 5.79 inch x 1.50 inch) ? Weight: 0.22 kg Key Features ? Spur Protection: Enables a single spur of addressable devices to be connected to the main loop while providing isolation for that specific branch. ? Automatic Fault Isolation: Detects a short circuit on the spur or loop and immediately isolates the affected section to ensure the rest of the system remains operational. ? Intelligent Soft Addressing: Automatically recognized and addressed by the control panel during initialization, simplifying the system setup and configuration. ? Seamless Loop Integration: Transparently communicates with the control panel to report the exact location of a fault for rapid maintenance and repair. ? Compact Design: Features a low-profile housing that fits onto a standard backbox, allowing for discreet installation in any commercial or industrial environment.