NS4-220 HOCHIKI

Product Overview

The NS4 is a 4-inch, electronics-free conventional detector base designed for secure and reliable installation in fire alarm systems. It features a plastic tamper-lock lug and is factory-equipped with a resistor for proper circuit supervision.

The HSC-220R, HSC-221R, and HSC-224R models are specifically designed for use with Hochiki conventional detectors including SLR-24H, SLR-24V, SLV-24 series, SLR-835 series, DCD-135/190, and legacy DFE 135/190 models. The HSC-(X)R series utilizes a 6-inch base configuration and incorporates two sets of Form “C” relay contacts, providing expanded signaling and control capabilities.

Key Features

• 4-inch electronics-free base (NS4)
• 6-inch base configuration (HSC-(X)R models)
• Current-limiting resistor for circuit protection
• Latching annunciator output
• Latching circuit maintains alarm condition until reset
• Alarm LED support
• Plastic tamper-lock lug for added security
• Two sets of Form “C” relay contacts (HSC-(X)R models)
• Rugged construction