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
