HDB-1(2,3) Explosion proof Telephone (Intrinsic Safety IIc Class)Detailed product description：

HDB-1 (2, 3) Explosion proof Telephone (Intrinsic Safety Class IIc)
Scope of application
Hazardous areas for explosive gas mixtures: Zone O, Zone 1, Zone 2
Explosive gas mixture: IIA, IIB, IIC
Temperature group: T1-T6
Indoor and outdoor

Product Features
This phone is an inherently safe type, which not only has the functions of a regular telephone, but also has full electronic and contactless sensing functions, and the circuit adopts special technology. The telephone is paired with the BOH-1 explosion-proof coupler and connected to the switch to form an explosion-proof communication system.

Main Technical Parameters of HDB-1 (2,3) Explosion proof Telephone (Intrinsic Safety Class IIc)

Model Type	Ringing voltage Bell-vibration voltage (DC)	Ringing current Bell-vibration current(mA)	Explosion-proof marking Ex-marking	Protection Rating Protected class	Overall dimensions Dimensions(mm)	Linked device Associate dequipment
HDB-1	≤48V	≤25	ExiaIICT6	IP54	220×150×75	HOB-1 explosion-proof coupler
HDB-2	≤48V	≤25	ExiaIICT6	IP65	410×260×185
HDB-3	≤48V	≤25	ExiaIICT6	IP54、 IP65	220×150×75

Model implication