Scope of application 
 ■ Suitable for Zone 1, Zone 2 hazardous site. 
 ■ Ⅱ A, Ⅱ B, Ⅱ C class, temperature group T1-T6 explosive gas environment 
 Features 
 ■ explosion-proof telephone outdoor installation, with the chassis; 
 ■ explosion-proof telephone must be equipped with couplers to the normal use of the phone to use the-way switch system. 

 Technical parameters 
 Ex - Type Voltage the anticorrosive rating Inlet thread the cable diameter continuous power-on time 
 DC AC 
 Of BDD-□ □ □ 24 
 36 24,36,220 Exd Ⅱ BT6 
 Exd Ⅱ CT6. IP65 W, WF1 3/4 "Φ10-Φ14, ≤, min,