The ANWETECH AT-S234 AC 120V is a non-addressable photoelectric smoke detector designed for indoor smoke monitoring in areas where an AC 120V power supply is available.
This version uses an AC 110V power design that permits AC 120V input. It is a separate voltage version and must be specified as AC 120V when ordering.
The detector uses an infrared photoelectric sensing chamber to detect visible smoke particles generated by smoldering fires and open flaming fires. It operates directly from the specified AC supply without requiring an addressable fire alarm loop.
A built-in audible alarm is included in the standard configuration. The detector also provides one voltage-free relay output with selectable normally open or normally closed operation. The NO/NC mode is selected using an onboard selector switch.
Smoke sensitivity can be adjusted using an internal switch. The standard factory setting is 1 dB/m.
Alarm and detector fault conditions share the same relay output group. The product does not provide a separate fault relay output.
The detector connects directly to an AC 120V power source. It does not require a separate 24VDC power supply or an addressable detection loop.
The AC 120V and AC 220V products are separate versions and must not be treated as a universal wide-voltage detector.
The infrared photoelectric sensing chamber responds to visible smoke particles produced by both slow smoldering fires and open flaming fires.
An internal selector allows the smoke sensitivity to be adjusted according to the application environment. The standard factory setting is 1 dB/m.
The detector provides one voltage-free relay output:
The required contact mode is selected using the internal selector or DIP switch.
The default product configuration includes an audible alarm with a stated sound level of at least 80 dB.
Smoke alarm and product fault conditions share the same relay output group. There is no separate dedicated fault contact.
The detector can be configured for automatic reset or power-off reset.
The detector includes design features intended to improve resistance to:
| Parameter | Specification |
|---|---|
| Brand | ANWETECH |
| Model | AT-S234 |
| Product Type | Non-addressable AC-powered photoelectric smoke detector |
| Voltage Version | AC 120V, 50/60Hz |
| Voltage Configuration | AC 110V design permitting AC 120V input |
| Ordering Requirement | AC 120V and AC 220V versions must be ordered separately |
| Sensor Type | Infrared photoelectric sensor |
| Smoke Sensitivity | Adjustable by onboard switch |
| Factory Sensitivity Setting | 1 dB/m |
| Standby Current | ≤50 mA |
| Alarm Current | ≤60 mA |
| Normal Indication | Green LED flashes |
| Alarm Indication | Red LED remains illuminated |
| Audible Alarm | Included in the standard configuration |
| Sound Level | ≥80 dB |
| Relay Output | One voltage-free COM + selectable NO/NC contact |
| NO/NC Selection | Internal selector or DIP switch |
| Maximum Switching Voltage | AC 220V or DC 220V |
| Maximum Contact Current | 5A |
| Fault Output | Shared with alarm output; no independent fault output |
| Reset Mode | Automatic reset or power-off reset selectable |
| Operating Temperature | -40°C to +80°C |
| Relative Humidity | Up to 95% RH, non-condensing |
| RF Immunity | 10 MHz to 1 GHz, 20 V/m |
| Dielectric Withstand | AC 3.5 kV |
| Dimensions | Ø104 × 53 mm |
| Maximum Installation Altitude | 5,000 m |
| Default Connection Version | Type B terminal-base connection |
A fixed detection distance is not specified for this point-type smoke detector.
Detection performance is determined by the smoke entering the photoelectric sensing chamber and by the selected sensitivity setting.
Detector quantity and spacing must also follow the applicable project design requirements and local fire alarm installation rules.
Type B is the standard connection arrangement.
The internal selector switch determines whether terminal 4 operates as normally open or normally closed.
The dry contact can be connected to compatible external monitoring or control equipment such as:
For motors, fans, solenoid valves or other high-inrush and inductive loads, use an appropriately rated intermediate relay or contactor. Do not connect a high-power load directly without confirming its electrical characteristics.
Alarm and detector fault conditions use the same relay output. The detector does not provide a separate fault terminal.
