BUS combined optical smoke and heat detector JA-111ST-A with built-in siren and LED indication. Operates as a system device on 12 V BUS (EN 54‑7; EN 54‑5) and, if BUS power or communication is lost, continues as an autonomous unit on 3×AA batteries (EN 14604). Suited for residential and commercial interiors.
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Smoke and heat detector JA-111ST-A
BUS combined optical smoke and heat detector JA-111ST-A with built-in siren and LED indication. Operates as a system device on 12 V BUS (EN 54‑7; EN 54‑5) and, if BUS power or communication is lost, continues as an autonomous unit on 3×AA batteries (EN 14604). Suited for residential and commercial interiors.
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| Connection method | BUS |
JA-111ST-A is a BUS combined smoke and heat detector with an integrated siren and LED status indicator. It contains two independent sensors: an optical (light scattering) smoke sensor for detecting dense smoke and a heat sensor (class A1) for fires that develop heat rapidly with little visible smoke.
The detector is designed to operate as a system device when powered by the control panel BUS (12 V DC, 9–15 V). If 3×AA batteries are inserted (alkaline LR6 or lithium FR6 recommended for low-temperature installations) and BUS power or communication is lost, the unit can continue operating autonomously in accordance with EN 14604.
The device provides optical and acoustic alarm signalling and is capable of distinguishing its own alarm, alarms reported by the system (triggered by other fire detectors) and other alarm types (e.g. intruder alarm). System parameters allow configuration of acoustic indication length and behaviour (including muting the device by pressing it against its base under defined conditions).
Key technical data (manufacturer datasheet):
JA-111ST-A is intended for indoor residential and commercial installation and is not suitable for industrial environments or spaces with heavy dust, cigarette smoke or continuous steam. Installation and commissioning should be performed by a trained installer holding a valid Jablotron certificate.
Note: batteries are not normally supplied. Use high-quality AA batteries of the same type and manufacturer; lithium FR6 cells are recommended where ambient temperatures fall below +5 °C.
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