Hochiki ACC-EN ESP Analogue Addressable Multi-Sensor | User Selectable Sensing Modes, Easy Maintenance Chamber
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Key features
- Three user-selectable sensing modes
- Removable chamber for easy maintenance
- Panel-controlled LED pulsing and sensitivity
Downloads
Summary
The Hochiki ACC-EN is an analogue addressable multi-sensor that lets you choose whether the optical element, the heat element, or both work together to make the fire decision, all set remotely from the control and indicating equipment (CIE) rather than fixed at the factory.
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That flexibility means you can specify one detector for a job and adjust its fire logic later if the risk assessment changes, without swapping devices or booking another site visit. It cuts down the number of detector variants you need to stock and carry on the van.
On site, the ACC-EN’s smoke chamber unclips for cleaning or replacement without disturbing the base or wiring, and twin LEDs give 360° visibility of its polling and alarm state from any approach angle. It communicates over Hochiki’s ESP analogue addressable protocol, so it drops straight onto compatible loops alongside other ESP devices.
Specifications
| Ordering Code | ACC-EN (Ivory), ACC-EN(WHT) (White), ACC-EN(BLK) (Black) |
|---|---|
| Operating Voltage | 17 to 41 VDC |
| Low Power Mode | 120 µA (typ.) |
| Quiescent Mode Current | 400 µA (typ.) at 24 VDC |
| Maximum Current Consumption | 45.5 mA |
| Alarm Current | 9.1 mA (controlled by CIE, excluding remote indicator) |
| Transmission Method | Digital communications using ESP |
| Operating Temperature Range | -10°C to +50°C |
| Operating Humidity | 95% RH, non-condensing (at 40°C) |
| Storage Temperature Range | -30°C to +60°C |
| Storage Humidity | Less than 80% RH at 60°C |
| Colour / Case Material | Ivory, white or black / polycarbonate |
| Weight | 95 g |
| Diameter / Height | 100 mm / 45 mm |
| Compatible Bases | YBN-R/3, YBO-R/SCI, YBN-R/3(SCI), YBO-BS, YBO-BS2, YBO-BS2(SCI), YBO-BSB, YBO-BSB2 |
| Base Fixing Centres | 48 to 74 mm |
| Wind Exposure | 1 ± 0.2 m/s (Ref EN54-7) |
| IP Rating | IP42 |
| Approvals | EN54-5, EN54-7 and EN54-29; LPCB and VdS approved to categories A1 and C; SIL2 |
Features
- User-selectable detection modes – switch between optical, heat or combined logic from the panel to match the risk in each area
- Removable high-performance chamber – unclip and replace the sensing element for cleaning or repair without changing the whole detector
- Twin 360° status LEDs – green polling and red alarm indication visible from any angle of approach
- Panel-controlled LED pulsing – set pulsing or non-pulsing indication to suit the panel’s monitoring regime
- Variable sensitivity – tune alarm thresholds on site to help manage false alarms in demanding environments
- Electronically addressed via ESP – digital communication supports individual polling and diagnostics on the loop
- Low standby draw – 120 µA typical in low power mode helps with loop power budgeting on larger systems
- Approved to EN54-5, EN54-7 and EN54-29, with LPCB and VdS approval to categories A1 and C, and SIL2-capable variants available – compliance covered for commercial fire installations
FAQ
Mode selection is configured from the control panel rather than on the device itself, so you’ll need a CIE (control and indicating equipment) that supports this function. Check your panel’s compatibility before specifying the ACC-EN if mode switching is important to the design. Yes, the ACC-EN’s high-performance chamber is designed to be unclipped and replaced independently, which speeds up routine maintenance and cuts the time spent at height. You don’t need to disturb the base or re-terminate wiring to do this. It’s compatible with a range of Hochiki bases including standard, sounder and SCI (short circuit isolator) variants, with base fixing centres from 48 to 74 mm. Confirm the exact base code against your project spec, as SCI functionality is built into specific base variants rather than the detector itself. Maximum current consumption is 45.5 mA, with alarm current controlled by the CIE at 9.1 mA excluding any remote indicator, and quiescent current around 400 µA at 24 VDC. Use these figures alongside your panel’s loop budget calculations rather than assuming a single fixed draw. It’s rated for operation up to 95% RH non-condensing at 40°C and an operating temperature range of -10°C to +50°C, which covers most unheated commercial spaces. For genuinely wet or washdown areas, check the IP42 rating against the environment before specifying.How do I switch between optical, heat and combined detection modes?
Can I service the smoke chamber without removing the whole detector?
Which bases does the ACC-EN fit?
What current should I allow for when designing the loop?
Is the ACC-EN suitable for humid or unheated spaces?
Downloads
- Datasheet (Adobe PDF)
Additional information
| Weight | 0.1 kg |
|---|---|
| Detection Type | |
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| Hazardous Applications | |
| Marine Applications |
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