The ANWETECH AT-S234 AC 220V is a standalone, non-addressable photoelectric smoke detector for indoor locations using a nominal AC 220V power supply.
The confirmed operating voltage range for this version is AC 187–245V, 50/60Hz. The AC 220V version must be ordered separately from the AC 120V version and is not part of a universal wide-voltage product.
The detector uses an infrared photoelectric sensing chamber to monitor visible smoke produced by smoldering and open flaming fires. Intelligent signal processing and a protected sensing structure help improve operating stability in indoor equipment environments.
The standard configuration includes an audible alarm, LED indication and one voltage-free relay contact output. An internal switch allows the installer to select normally open or normally closed operation.
The smoke sensitivity can also be adjusted using an onboard selector. The standard factory setting is 1 dB/m.
Alarm and product fault conditions share one output group. A separate fault relay is not provided.
The AC 220V version operates from an AC 187–245V, 50/60Hz power supply.
It is supplied as a dedicated AC 220V product and must not be connected based on assumptions of universal AC input.
The detector operates independently from an addressable loop and monitors visible smoke using an infrared photoelectric sensing chamber.
The standard configuration includes an audible alarm rated at a stated sound level of at least 80 dB.
The sensitivity can be adjusted through an internal switch. The regular factory setting is 1 dB/m.
The detector provides one voltage-free relay output for connection to compatible monitoring or control equipment.
An onboard switch allows the installer to select either normally open or normally closed relay operation.
Alarm and fault conditions operate the same shared relay output group. There is no separate fault contact.
Automatic reset or power-off reset can be selected according to the required operating logic.
The detector structure includes resistance to dust, insects, external white light and radio-frequency interference.
| Parameter | Specification |
|---|---|
| Brand | ANWETECH |
| Model | AT-S234 |
| Product Type | Non-addressable AC-powered photoelectric smoke detector |
| Voltage Version | AC 220V, 50/60Hz |
| Operating Voltage Range | AC 187–245V |
| Ordering Requirement | AC 220V and AC 120V versions must be ordered separately |
| Detection Principle | Infrared photoelectric smoke sensing |
| Sensitivity Adjustment | Adjustable through onboard switch |
| Standard Factory Sensitivity | 1 dB/m |
| Standby Current | ≤50 mA |
| Alarm Current | ≤60 mA |
| Normal Status | Green LED flashes |
| Alarm Status | Red LED remains illuminated |
| Audible Alarm | Included as standard |
| Alarm Sound Level | ≥80 dB |
| Relay Type | Voltage-free dry contact |
| Contact Configuration | COM + selectable NO/NC |
| NO/NC Selection | Internal selector or DIP switch |
| Maximum Switching Voltage | AC 220V or DC 220V |
| Maximum Contact Current | 5A |
| Alarm/Fault Output | Shared output group |
| Separate Fault Output | Not provided |
| Reset Selection | Automatic reset or power-off reset |
| Operating Temperature | -40°C to +80°C |
| Maximum Relative Humidity | 95% RH, non-condensing |
| RF Immunity | 10 MHz to 1 GHz, 20 V/m |
| Dielectric Withstand | AC 3.5 kV |
| Detector Dimensions | Ø104 × 53 mm |
| Maximum Installation Altitude | 5,000 m |
| Standard Base Version | Type B terminal base |
The source manual does not specify a fixed smoke detection distance because the AT-S234 is a point-type smoke detector.
The detector responds when smoke reaches the internal photoelectric sensing chamber.
Confirmed performance and placement information includes:
Final detector spacing must be determined according to the protected area, ceiling conditions and applicable local design requirements.
Type B is the normal default connection version.
The AC 220V supply must be connected only to the power terminals. The relay terminals are voltage-free contacts and do not supply output voltage.
The internal DIP switch is used to select normally open or normally closed operation.
The output contact may be connected to a compatible:
For equipment with high starting current or inductive characteristics, use an external interface relay or contactor.
The alarm and detector fault signal share the same output contact. No independent trouble or fault output is available.
