The Hochiki ATJ-EN(SCI) is an intelligent multi-heat sensor with a built-in short-circuit isolator (SCI), in an ivory case, for the Hochiki ESP 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
- Integral short-circuit isolator (YBV-R/4 base keeps the SCI function)
- 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, amber when isolating, red in fire
- Polling LEDs can be set to pulsing or non-pulsing from the panel (control panel compatibility required)
- Electronically addressed
- LPCB and VdS approved to classes A1, B and C (ivory and white versions)
Technical specifications
- Ordering code: ATJ-EN(SCI) (ivory)
- Operating voltage: 17 to 41 VDC
- Low power mode: 110 µA (typical)
- Quiescent current: 410 µA (typical) at 24 VDC
- Maximum current consumption: 30 mA
- Alarm current (controlled by the panel): 9.1 mA, excluding remote indicator
- Current in short circuit: 13.5 mA
- 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: 95 g
- Dimensions: Ø100 x 45 mm (H)
- Compatible base: YBV-R/4
- Base fixing centres: 48 to 74 mm
- Approvals: classes A1R, BR, CR, A1S, BS and CS
- Ingress protection: IP42
