YBN-R4IS

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YBN-R4IS:

4-terminal detector base (aluminium or ABS depending on version) for Hochiki ATEX detector – model YBN-R/4(IS)

1 . Designation

4-terminal intrinsically safe detector base (ATEX) – Hochiki YBN-R/4(IS)

2 . General Description

The YBN-R/4(IS) is an intrinsically safe (IS) conventional detector base designed for use with compatible Hochiki fire detectors in hazardous (ATEX) environments.

It provides both mechanical mounting and electrical connection while ensuring compliance with intrinsic safety requirements for explosive atmospheres (gas or dust zones).

3 . Key Features

✔️ Type: Intrinsically safe (ATEX) conventional base
✔️ Terminals: 4 wiring terminals (zone connection + continuity)
✔️ Compatibility: Hochiki intrinsically safe detectors (CDX / IS range)
✔️ Wiring: Screw terminals for 1 to 2.5 mm² cables
✔️ Material: High-quality ABS (often mistakenly specified as aluminum)
✔️ Design: Low-profile (approx. 8 mm height)
✔️ Earth terminal: Available for cable screen grounding
✔️ Electronics: None (enhanced reliability and safety)

4 . Technical Specifications

🔸 Diameter: 100 mm
🔸 Height: 8 mm
🔸 Weight: Approx. 51 g
🔸 Fixing centers: 48 to 74 mm
🔸 Humidity tolerance: Up to 95% RH (non-condensing at 40°C)

5 . Important Notes

⚠️ No automatic line continuity when the detector is removed
→ Requires specific wiring configuration
⚠️ Must be used only with certified intrinsically safe Hochiki detectors
✔️ Installation must comply with ATEX regulations and be carried out by qualified personnel