Hochiki ESP Addressable Heat Detector (Ivory Case) (ATJ-EN)

The Hochiki ATJ-EN is an intelligent multi-heat sensor in an ivory case for the Hochiki ESP (Enhanced Systems Protocol) analogue addressable fire detection system. It combines a variable fixed-temperature heat element with a rate-of-rise heat element. Both are controlled from the fire alarm control panel, so either element, or both together, can be used to make the fire decision.

Key features

• User-selectable detection modes, set from the control panel
• Fixed-temperature and rate-of-rise heat elements
• Twin LEDs give 360° viewing: green when polling, red in fire
• Polling LEDs can be set to pulsing or non-pulsing from the panel (control panel compatibility required)
• Electronically addressed with the Hochiki TCH-B200 hand-held programmer
• LPCB and VdS approved to classes A1, B and C
• SIL Level 2 approved variants available

Technical specifications

• Ordering code: ATJ-EN (ivory)
• Operating voltage: 17 to 41 VDC
• Low power mode: 110 µA (typical)
• Quiescent current: 350 µA (typical) at 24 VDC
• Maximum current consumption: 30 mA
• Alarm current (controlled by the panel): 9.1 mA, excluding remote indicator
• Transmission method: digital communications using ESP
• Operating temperature: -10 °C to +50 °C
• Operating humidity: 95% RH non-condensing (at 40 °C)
• Storage temperature: -30 °C to +60 °C
• Case material: polycarbonate
• Weight: 90 g
• Dimensions: Ø100 x 45 mm (H)
• Compatible bases: YBN-R/3, YBO-R/SCI, YBO-BS, YBO-BSB, YBN-R/3(SCI)
• Base fixing centres: 48 to 74 mm
• Approvals: classes A1R, BR, CR, A1S, BS and CS
• Ingress protection: IP42