| Operating voltage | 
            230 V, 50-60 Hz AC (+15%,-15% tolerance) | 
        
        
            | Max PSU rating | 
            2 A  / 24 V DC | 
        
        
            | Auxiliary output | 
            24 V DC / 250 mA | 
        
        
            | Loop load | 
            500 mA | 
        
        
            | Ambient temperature | 
            0°C ... 40°C | 
        
        
            | Humidity | 
            5% ... 95% non-condensing | 
        
        
            | Batteries | 
            2 x 12 V / 7 Ah  | 
        
        
            | Dimension | 
            H: 260 mm W: 390 mm D: 147 mm | 
        
        
            | Weight | 
            4 kg | 
        
        
            | Color | 
            gray white, similar to RAL 9002 | 
        
        
            | Ingress protection | 
            IP30 | 
        
        
            | Cable entry | 
            25 x 20 mm knock-outs at the top and 2 x 20 mm knock-outs at the bottom | 
        
        
            | Sounder ckt Rating | 
            1 A | 
        
        
            | Housing material | 
            Mild Steel (rear enclosure), ABS plastic front cover complying BS EN60950 |