Siemens FDHM228 Fire Hydrant Alarm Button

I. Overview of FDHM228 Fire Hydrant Alarm Button (Glass Break Type):

l FDHM228-CN Fire Hydrant Alarm Button (Glass Break Type). Used in public places, when a fire occurs, the glass is broken, the start lamp lights up, and the fire pump is linked through the controller. It consists of two parts: the housing and electronic components. The alarm is activated directly after the glass is broken. It complies with the standard GB16806-2006 “Fire Linkage Control System” and is equipped with two light-emitting diodes (LEDs): one for displaying the start status and the other for displaying the fire pump start response status. A dual-color LED can display alarms, positioning, and test statuses.

l Installed near indoor fire hydrants, it is waterproof and can be used in humid environments. Internally, it integrates a short-circuit isolator. It communicates with the controller through the FDnet loop—soft address coding mode.

II. Features of FDHM228 Fire Hydrant Alarm Button (Glass Break Type):

A. Used in public places, when a fire occurs, the glass is broken, the start lamp lights up, and the fire pump is linked through the controller. It consists of two parts: the housing and electronic components.

B. The alarm is activated directly after the glass is broken.

C. Complies with the standard GB16806-2006 “Fire Linkage Control System.”

D. Equipped with two light-emitting diodes (LEDs): one for displaying the start status and the other for displaying the fire pump start response status.

E. A dual-color LED can display alarms, positioning, and test statuses.

F. Installed near indoor fire hydrants, it has waterproof features and can be used in humid environments.

G. Integrates a short-circuit isolator internally.

H. Communicates with the controller through the FDnet loop.

I. Soft address coding mode.

J. The location should be convenient for connection to surface-mounted and pre-embedded installation methods.

III. Main Technical Specifications:

l Operating voltage: 12...33VDC

l Operating current (static): 200μA

l Operating temperature: –25...+70°C

l Storage temperature: –30...+75°C

l Relative humidity: ≤95% rel.

l Communication protocol: FDnet

l Terminal wire size: 0.28...1.5mm2

l Dimensions (mm): 90.5x91.3

l Weight (Kg): 0.16

l Color: Red, RAL3000

l Protection rating: EN60529/IEC529

For the previous part, please refer to the link: Siemens FDM228